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# File pp/examples/auto_diff.py

-#!/usr/bin/env python
-# File: auto_diff.py
-# Author: Vitalii Vanovschi
-# Desc: This program demonstrates parallel computations with pp module
-# using class methods as parallel functions (available since pp 1.4).
-# Program calculates the partial sums of f(x) = x-x**2/2+x**3/3-x**4/4+...
-# and first derivatives f'(x) using automatic differentiation technique.
-# In the limit f(x) = ln(x+1) and f'(x) = 1/(x+1).
-# Parallel Python Software: http://www.parallelpython.com
-
-import math
-import sys
-import pp
-
-
-# Partial implemenmtation of automatic differentiation class
-
-
-
-    def __init__(self, x, dx=0.0):
-        self.x = float(x)
-        self.dx = float(dx)
-
-    def __pow__(self, val):
-        if isinstance(val, int):
-            p = self.x**val
-        else:
-            raise TypeError("Second argumnet must be an integer")
-
-        else:
-
-        return self+val
-
-    def __mul__(self, val):
-        else:
-
-    def __rmul__(self, val):
-        return self*val
-
-    def __div__(self, val):
-        else:
-            return self*(1/float(val))
-
-    def __rdiv__(self, val):
-
-    def __sub__(self, val):
-        else:
-
-    def __repr__(self):
-        return str((self.x, self.dx))
-
-
-class PartialSum(object):
-
-    def __init__(self, n):
-        """
-        This class contains methods which will be executed in parallel
-        """
-
-        self.n = n
-
-    def t_log(self, x):
-        """
-        truncated natural logarithm
-        """
-        return self.partial_sum(x-1)
-
-    def partial_sum(self, x):
-        """
-        partial sum for truncated natural logarithm
-        """
-        return sum([float(i%2 and 1 or -1)*x**i/i for i in xrange(1, self.n)])
-
-
-print """Usage: python auto_diff.py [ncpus]
-    [ncpus] - the number of workers to run in parallel,
-    if omitted it will be set to the number of processors in the system
-"""
-
-# tuple of all parallel python servers to connect with
-#ppservers = ("*",) # auto-discover
-#ppservers = ("10.0.0.1","10.0.0.2") # list of static IPs
-ppservers = ()
-
-if len(sys.argv) > 1:
-    ncpus = int(sys.argv[1])
-    # Creates jobserver with ncpus workers
-    job_server = pp.Server(ncpus, ppservers=ppservers)
-else:
-    # Creates jobserver with automatically detected number of workers
-    job_server = pp.Server(ppservers=ppservers)
-
-print "Starting pp with", job_server.get_ncpus(), "workers"
-
-proc = PartialSum(20000)
-
-results = []
-for i in range(32):
-    # Creates an object with x = float(i)/32+1 and dx = 1.0
-    # Submits a job of calulating proc.t_log(x).
-    f = job_server.submit(proc.t_log, (ad_x, ))
-
-for x, f in results:
-    # Retrieves the result of the calculation
-    val = f()
-    print "t_log(%lf) = %lf, t_log'(%lf) = %lf" % (x, val.x, x, val.dx)
-
-# Print execution statistics
-job_server.print_stats()
-
-# Parallel Python Software: http://www.parallelpython.com

# File pp/examples/callback.py

-#!/usr/bin/env python
-# File: callback.py
-# Author: Vitalii Vanovschi
-# Desc: This program demonstrates parallel computations with pp module
-# using callbacks (available since pp 1.3).
-# Program calculates the partial sum 1-1/2+1/3-1/4+1/5-1/6+...
-# (in the limit it is ln(2))
-# Parallel Python Software: http://www.parallelpython.com
-
-import math
-import time
-import sys
-import pp
-
-
-class Sum(object):
-    """Class for callbacks
-    """
-
-    def __init__(self):
-        self.value = 0.0
-        self.count = 0
-
-        """
-        the callback function
-        """
-        # we must use lock here because += is not atomic
-        self.count += 1
-        self.lock.acquire()
-        self.value += value
-        self.lock.release()
-
-
-def part_sum(start, end):
-    """Calculates partial sum"""
-    sum = 0
-    for x in xrange(start, end):
-        if x % 2 == 0:
-            sum -= 1.0 / x
-        else:
-            sum += 1.0 / x
-    return sum
-
-
-print """Usage: python callback.py [ncpus]
-    [ncpus] - the number of workers to run in parallel,
-    if omitted it will be set to the number of processors in the system
-"""
-
-start = 1
-end = 20000000
-
-parts = 128
-step = (end - start) / parts + 1
-
-# tuple of all parallel python servers to connect with
-#ppservers = ("*",) # auto-discover
-#ppservers = ("10.0.0.1","10.0.0.2") # list of static IPs
-ppservers = ()
-
-if len(sys.argv) > 1:
-    ncpus = int(sys.argv[1])
-    # Creates jobserver with ncpus workers
-    job_server = pp.Server(ncpus, ppservers=ppservers)
-else:
-    # Creates jobserver with automatically detected number of workers
-    job_server = pp.Server(ppservers=ppservers)
-
-print "Starting pp with", job_server.get_ncpus(), "workers"
-
-# Create anm instance of callback class
-sum = Sum()
-
-# Execute the same task with different number
-# of active workers and measure the time
-
-start_time = time.time()
-for index in xrange(parts):
-    starti = start+index*step
-    endi = min(start+(index+1)*step, end)
-    # Submit a job which will calculate partial sum
-    # part_sum - the function
-    # (starti, endi) - tuple with arguments for part_sum
-    # callback=sum.add - callback function
-
-#wait for jobs in all groups to finish
-job_server.wait()
-
-# Print the partial sum
-print "Partial sum is", sum.value, "| diff =", math.log(2) - sum.value
-
-job_server.print_stats()
-
-# Parallel Python Software: http://www.parallelpython.com

# File pp/examples/dynamic_ncpus.py

-#!/usr/bin/env python
-# File: dynamic_ncpus.py
-# Author: Vitalii Vanovschi
-# Desc: This program demonstrates parallel computations with pp module
-# and dynamic cpu allocation feature.
-# Program calculates the partial sum 1-1/2+1/3-1/4+1/5-1/6+...
-# (in the limit it is ln(2))
-# Parallel Python Software: http://www.parallelpython.com
-
-import math
-import sys
-import time
-import pp
-
-
-def part_sum(start, end):
-    """Calculates partial sum"""
-    sum = 0
-    for x in xrange(start, end):
-        if x % 2 == 0:
-            sum -= 1.0 / x
-        else:
-            sum += 1.0 / x
-    return sum
-
-print """Usage: python dynamic_ncpus.py"""
-print
-
-start = 1
-end = 20000000
-
-parts = 64
-step = (end - start) / parts + 1
-
-# Create jobserver
-job_server = pp.Server()
-
-# Execute the same task with different amount of active workers
-# and measure the time
-for ncpus in (1, 2, 4, 8, 16, 1):
-    job_server.set_ncpus(ncpus)
-    jobs = []
-    start_time = time.time()
-    print "Starting ", job_server.get_ncpus(), " workers"
-    for index in xrange(parts):
-        starti = start+index*step
-        endi = min(start+(index+1)*step, end)
-        # Submit a job which will calculate partial sum
-        # part_sum - the function
-        # (starti, endi) - tuple with arguments for part_sum
-        # () - tuple with functions on which function part_sum depends
-        # () - tuple with module names which must be
-        #      imported before part_sum execution
-        jobs.append(job_server.submit(part_sum, (starti, endi)))
-
-    # Retrieve all the results and calculate their sum
-    part_sum1 = sum([job() for job in jobs])
-    # Print the partial sum
-    print "Partial sum is", part_sum1, "| diff =", math.log(2) - part_sum1
-
-    print "Time elapsed: ", time.time() - start_time, "s"
-    print
-job_server.print_stats()
-
-# Parallel Python Software: http://www.parallelpython.com

# File pp/examples/quicksort.py

-#!/usr/bin/env python
-# File: sum_primes.py
-# Author: Vitalii Vanovschi
-# Desc: This program demonstrates parallel version of quicksort algorithm
-# implemented using pp module
-# Parallel Python Software: http://www.parallelpython.com
-
-import sys, random
-import pp
-
-
-def quicksort(a, n=-1, srv=None):
-    if len(a) <= 1:
-        return a
-    if n:
-        return quicksort([x for x in a if x < a[0]], n-1, srv) \
-                + [a[0]] + quicksort([x for x in a[1:] if x >= a[0]], n-1, srv)
-    else:
-        return [srv.submit(quicksort, (a,))]
-
-
-print """Usage: python quicksort.py [ncpus]
-    [ncpus] - the number of workers to run in parallel,
-    if omitted it will be set to the number of processors in the system
-"""
-
-# tuple of all parallel python servers to connect with
-#ppservers = ("*",)
-#ppservers = ("10.0.0.1",)
-ppservers = ()
-
-if len(sys.argv) > 1:
-    ncpus = int(sys.argv[1])
-    # Creates jobserver with ncpus workers
-    job_server = pp.Server(ncpus, ppservers=ppservers)
-else:
-    # Creates jobserver with automatically detected number of workers
-    job_server = pp.Server(ppservers=ppservers)
-
-print "Starting pp with", job_server.get_ncpus(), "workers"
-
-n = 1000000
-input = []
-for i in xrange(n):
-    input.append(random.randint(0,100000))
-
-# set n to a positive integer to create 2^n PP jobs
-# or to -1 to avoid using PP
-
-# 32 PP jobs
-n = 5
-
-# no PP
-#n = -1
-
-outputraw = quicksort(input, n, job_server)
-
-output = []
-for x in outputraw:
-    if callable(x):
-        output.extend(x())
-    else:
-        output.append(x)
-
-print "first 30 numbers in increasing order:", output[:30]
-
-job_server.print_stats()
-
-# Parallel Python Software: http://www.parallelpython.com

# File pp/examples/reverse_md5.py

-#!/usr/bin/env python
-# File: reverse_md5.py
-# Author: Vitalii Vanovschi
-# Desc: This program demonstrates parallel computations with pp module
-# It tries to reverse an md5 hash in parallel
-# Parallel Python Software: http://www.parallelpython.com
-
-import math
-import sys
-import md5
-import pp
-
-
-def md5test(hash, start, end):
-    """Calculates md5 of the integerss between 'start' and 'end' and
-       compares it with 'hash'"""
-    for x in xrange(start, end):
-        if md5.new(str(x)).hexdigest() == hash:
-            return x
-
-
-print """Usage: python reverse_md5.py [ncpus]
-    [ncpus] - the number of workers to run in parallel,
-    if omitted it will be set to the number of processors in the system
-"""
-
-# tuple of all parallel python servers to connect with
-#ppservers = ("*",) # auto-discover
-#ppservers = ("10.0.0.1","10.0.0.2") # list of static IPs
-ppservers = ()
-
-if len(sys.argv) > 1:
-    ncpus = int(sys.argv[1])
-    # Creates jobserver with ncpus workers
-    job_server = pp.Server(ncpus, ppservers=ppservers)
-else:
-    # Creates jobserver with automatically detected number of workers
-    job_server = pp.Server(ppservers=ppservers)
-
-print "Starting pp with", job_server.get_ncpus(), "workers"
-
-#Calculates md5 hash from the given number
-hash = md5.new("1829182").hexdigest()
-print "hash =", hash
-#Now we will try to find the number with this hash value
-
-start = 1
-end = 2000000
-
-# Since jobs are not equal in the execution time, division of the problem
-# into a 128 of small subproblems leads to a better load balancing
-parts = 128
-
-step = (end - start) / parts + 1
-jobs = []
-
-for index in xrange(parts):
-    starti = start+index*step
-    endi = min(start+(index+1)*step, end)
-    # Submit a job which will test if a number in the range starti-endi
-    # has given md5 hash
-    # md5test - the function
-    # (hash, starti, endi) - tuple with arguments for md5test
-    # () - tuple with functions on which function md5test depends
-    # ("md5",) - tuple with module names which must be imported before
-    # md5test execution
-    # jobs.append(job_server.submit(md5test, (hash, starti, endi),
-    # globals=globals()))
-    jobs.append(job_server.submit(md5test, (hash, starti, endi),
-            (), ("md5", )))
-
-# Retrieve results of all submited jobs
-for job in jobs:
-    result = job()
-    if result:
-        break
-
-# Print the results
-if result:
-    print "Reverse md5 for", hash, "is", result
-else:
-    print "Reverse md5 for", hash, "has not been found"
-
-job_server.print_stats()
-
-# Properly finalize all tasks (not necessary)
-job_server.wait()
-
-# Parallel Python Software: http://www.parallelpython.com

# File pp/examples/sum_primes.py

-#!/usr/bin/env python
-# File: sum_primes.py
-# Author: Vitalii Vanovschi
-# Desc: This program demonstrates parallel computations with pp module
-# It calculates the sum of prime numbers below a given integer in parallel
-# Parallel Python Software: http://www.parallelpython.com
-
-import math
-import sys
-import pp
-
-
-def isprime(n):
-    """Returns True if n is prime and False otherwise"""
-    if not isinstance(n, int):
-        raise TypeError("argument passed to is_prime is not of 'int' type")
-    if n < 2:
-        return False
-    if n == 2:
-        return True
-    max = int(math.ceil(math.sqrt(n)))
-    i = 2
-    while i <= max:
-        if n % i == 0:
-            return False
-        i += 1
-    return True
-
-
-def sum_primes(n):
-    """Calculates sum of all primes below given integer n"""
-    return sum([x for x in xrange(2, n) if isprime(x)])
-
-
-print """Usage: python sum_primes.py [ncpus]
-    [ncpus] - the number of workers to run in parallel,
-    if omitted it will be set to the number of processors in the system"""
-
-# tuple of all parallel python servers to connect with
-ppservers = ()
-#ppservers = ("127.0.0.1:60000", )
-
-if len(sys.argv) > 1:
-    ncpus = int(sys.argv[1])
-    # Creates jobserver with ncpus workers
-    job_server = pp.Server(ncpus, ppservers=ppservers)
-else:
-    # Creates jobserver with automatically detected number of workers
-    job_server = pp.Server(ppservers=ppservers)
-
-print "Starting pp with", job_server.get_ncpus(), "workers"
-
-# Submit a job of calulating sum_primes(100) for execution.
-# sum_primes - the function
-# (100,) - tuple with arguments for sum_primes
-# (isprime,) - tuple with functions on which function sum_primes depends
-# ("math",) - tuple with module names which must be imported before
-#             sum_primes execution
-# Execution starts as soon as one of the workers will become available
-job1 = job_server.submit(sum_primes, (100, ), (isprime, ), ("math", ))
-
-# Retrieves the result calculated by job1
-# The value of job1() is the same as sum_primes(100)
-# If the job has not been finished yet, execution will
-# wait here until result is available
-result = job1()
-
-print "Sum of primes below 100 is", result
-
-
-# The following submits 8 jobs and then retrieves the results
-inputs = (100000, 100100, 100200, 100300, 100400, 100500, 100600, 100700)
-jobs = [(input, job_server.submit(sum_primes, (input, ), (isprime, ),
-        ("math", ))) for input in inputs]
-
-for input, job in jobs:
-    print "Sum of primes below", input, "is", job()
-
-job_server.print_stats()
-
-# Parallel Python Software: http://www.parallelpython.com

# File pp/examples/sum_primes_functor.py

-#!/usr/bin/env python
-# File: sum_primes_template.py
-# Author: Vitalii Vanovschi
-# Desc: This program demonstrates using pp template class
-# It calculates the sum of prime numbers below a given integer in parallel
-# Parallel Python Software: http://www.parallelpython.com
-
-import math, sys
-import pp
-
-
-def isprime(n):
-    """Returns True if n is prime and False otherwise"""
-    if not isinstance(n, int):
-        raise TypeError("argument passed to is_prime is not of 'int' type")
-    if n < 2:
-        return False
-    if n == 2:
-        return True
-    max = int(math.ceil(math.sqrt(n)))
-    i = 2
-    while i <= max:
-        if n % i == 0:
-            return False
-        i += 1
-    return True
-
-
-def sum_primes(n):
-    """Calculates sum of all primes below given integer n"""
-    return sum([x for x in xrange(2,n) if isprime(x)])
-
-
-print """Usage: python sum_primes.py [ncpus]
-    [ncpus] - the number of workers to run in parallel,
-    if omitted it will be set to the number of processors in the system
-"""
-
-# tuple of all parallel python servers to connect with
-#ppservers = ("*",) # auto-discover
-#ppservers = ("10.0.0.1","10.0.0.2") # list of static IPs
-ppservers = ()
-
-if len(sys.argv) > 1:
-    ncpus = int(sys.argv[1])
-    # Creates jobserver with ncpus workers
-    job_server = pp.Server(ncpus, ppservers=ppservers)
-else:
-    # Creates jobserver with automatically detected number of workers
-    job_server = pp.Server(ppservers=ppservers)
-
-print "Starting pp with", job_server.get_ncpus(), "workers"
-
-# Creates a template
-# Template is created using all the parameters of the jobs except
-# the arguments of the function
-# sum_primes - the function
-# (isprime,) - tuple with functions on which function sum_primes depends
-# ("math",) - tuple with module names which must be imported
-#             before sum_primes execution
-fn = pp.Template(job_server, sum_primes, (isprime,), ("math",))
-
-# Submit a job of calulating sum_primes(100) for execution using
-# previously created template
-# Execution starts as soon as one of the workers will become available
-job1 = fn.submit(100)
-
-# Retrieves the result calculated by job1
-# The value of job1() is the same as sum_primes(100)
-# If the job has not been finished yet,
-# execution will wait here until result is available
-result = job1()
-
-print "Sum of primes below 100 is", result
-
-# The following submits 8 jobs and then retrieves the results
-inputs = (100000, 100100, 100200, 100300, 100400, 100500, 100600, 100700)
-jobs = [(input, fn.submit(input)) for input in inputs]
-
-for input, job in jobs:
-    print "Sum of primes below", input, "is", job()
-
-job_server.print_stats()
-
-# Parallel Python Software: http://www.parallelpython.com

# File pp_examples/auto_diff.py

+#!/usr/bin/env python
+# File: auto_diff.py
+# Author: Vitalii Vanovschi
+# Desc: This program demonstrates parallel computations with pp module
+# using class methods as parallel functions (available since pp 1.4).
+# Program calculates the partial sums of f(x) = x-x**2/2+x**3/3-x**4/4+...
+# and first derivatives f'(x) using automatic differentiation technique.
+# In the limit f(x) = ln(x+1) and f'(x) = 1/(x+1).
+# Parallel Python Software: http://www.parallelpython.com
+
+import math
+import sys
+import pp
+
+
+# Partial implemenmtation of automatic differentiation class
+
+
+
+    def __init__(self, x, dx=0.0):
+        self.x = float(x)
+        self.dx = float(dx)
+
+    def __pow__(self, val):
+        if isinstance(val, int):
+            p = self.x**val
+        else:
+            raise TypeError("Second argumnet must be an integer")
+
+        else:
+
+        return self+val
+
+    def __mul__(self, val):
+        else:
+
+    def __rmul__(self, val):
+        return self*val
+
+    def __div__(self, val):
+        else:
+            return self*(1/float(val))
+
+    def __rdiv__(self, val):
+
+    def __sub__(self, val):
+        else:
+
+    def __repr__(self):
+        return str((self.x, self.dx))
+
+
+class PartialSum(object):
+
+    def __init__(self, n):
+        """
+        This class contains methods which will be executed in parallel
+        """
+
+        self.n = n
+
+    def t_log(self, x):
+        """
+        truncated natural logarithm
+        """
+        return self.partial_sum(x-1)
+
+    def partial_sum(self, x):
+        """
+        partial sum for truncated natural logarithm
+        """
+        return sum([float(i%2 and 1 or -1)*x**i/i for i in xrange(1, self.n)])
+
+
+print """Usage: python auto_diff.py [ncpus]
+    [ncpus] - the number of workers to run in parallel,
+    if omitted it will be set to the number of processors in the system
+"""
+
+# tuple of all parallel python servers to connect with
+#ppservers = ("*",) # auto-discover
+#ppservers = ("10.0.0.1","10.0.0.2") # list of static IPs
+ppservers = ()
+
+if len(sys.argv) > 1:
+    ncpus = int(sys.argv[1])
+    # Creates jobserver with ncpus workers
+    job_server = pp.Server(ncpus, ppservers=ppservers)
+else:
+    # Creates jobserver with automatically detected number of workers
+    job_server = pp.Server(ppservers=ppservers)
+
+print "Starting pp with", job_server.get_ncpus(), "workers"
+
+proc = PartialSum(20000)
+
+results = []
+for i in range(32):
+    # Creates an object with x = float(i)/32+1 and dx = 1.0
+    # Submits a job of calulating proc.t_log(x).
+    f = job_server.submit(proc.t_log, (ad_x, ))
+
+for x, f in results:
+    # Retrieves the result of the calculation
+    val = f()
+    print "t_log(%lf) = %lf, t_log'(%lf) = %lf" % (x, val.x, x, val.dx)
+
+# Print execution statistics
+job_server.print_stats()
+
+# Parallel Python Software: http://www.parallelpython.com

# File pp_examples/callback.py

+#!/usr/bin/env python
+# File: callback.py
+# Author: Vitalii Vanovschi
+# Desc: This program demonstrates parallel computations with pp module
+# using callbacks (available since pp 1.3).
+# Program calculates the partial sum 1-1/2+1/3-1/4+1/5-1/6+...
+# (in the limit it is ln(2))
+# Parallel Python Software: http://www.parallelpython.com
+
+import math
+import time
+import sys
+import pp
+
+
+class Sum(object):
+    """Class for callbacks
+    """
+
+    def __init__(self):
+        self.value = 0.0
+        self.count = 0
+
+        """
+        the callback function
+        """
+        # we must use lock here because += is not atomic
+        self.count += 1
+        self.lock.acquire()
+        self.value += value
+        self.lock.release()
+
+
+def part_sum(start, end):
+    """Calculates partial sum"""
+    sum = 0
+    for x in xrange(start, end):
+        if x % 2 == 0:
+            sum -= 1.0 / x
+        else:
+            sum += 1.0 / x
+    return sum
+
+
+print """Usage: python callback.py [ncpus]
+    [ncpus] - the number of workers to run in parallel,
+    if omitted it will be set to the number of processors in the system
+"""
+
+start = 1
+end = 20000000
+
+parts = 128
+step = (end - start) / parts + 1
+
+# tuple of all parallel python servers to connect with
+#ppservers = ("*",) # auto-discover
+#ppservers = ("10.0.0.1","10.0.0.2") # list of static IPs
+ppservers = ()
+
+if len(sys.argv) > 1:
+    ncpus = int(sys.argv[1])
+    # Creates jobserver with ncpus workers
+    job_server = pp.Server(ncpus, ppservers=ppservers)
+else:
+    # Creates jobserver with automatically detected number of workers
+    job_server = pp.Server(ppservers=ppservers)
+
+print "Starting pp with", job_server.get_ncpus(), "workers"
+
+# Create anm instance of callback class
+sum = Sum()
+
+# Execute the same task with different number
+# of active workers and measure the time
+
+start_time = time.time()
+for index in xrange(parts):
+    starti = start+index*step
+    endi = min(start+(index+1)*step, end)
+    # Submit a job which will calculate partial sum
+    # part_sum - the function
+    # (starti, endi) - tuple with arguments for part_sum
+    # callback=sum.add - callback function
+
+#wait for jobs in all groups to finish
+job_server.wait()
+
+# Print the partial sum
+print "Partial sum is", sum.value, "| diff =", math.log(2) - sum.value
+
+job_server.print_stats()
+
+# Parallel Python Software: http://www.parallelpython.com

# File pp_examples/dynamic_ncpus.py

+#!/usr/bin/env python
+# File: dynamic_ncpus.py
+# Author: Vitalii Vanovschi
+# Desc: This program demonstrates parallel computations with pp module
+# and dynamic cpu allocation feature.
+# Program calculates the partial sum 1-1/2+1/3-1/4+1/5-1/6+...
+# (in the limit it is ln(2))
+# Parallel Python Software: http://www.parallelpython.com
+
+import math
+import sys
+import time
+import pp
+
+
+def part_sum(start, end):
+    """Calculates partial sum"""
+    sum = 0
+    for x in xrange(start, end):
+        if x % 2 == 0:
+            sum -= 1.0 / x
+        else:
+            sum += 1.0 / x
+    return sum
+
+print """Usage: python dynamic_ncpus.py"""
+print
+
+start = 1
+end = 20000000
+
+parts = 64
+step = (end - start) / parts + 1
+
+# Create jobserver
+job_server = pp.Server()
+
+# Execute the same task with different amount of active workers
+# and measure the time
+for ncpus in (1, 2, 4, 8, 16, 1):
+    job_server.set_ncpus(ncpus)
+    jobs = []
+    start_time = time.time()
+    print "Starting ", job_server.get_ncpus(), " workers"
+    for index in xrange(parts):
+        starti = start+index*step
+        endi = min(start+(index+1)*step, end)
+        # Submit a job which will calculate partial sum
+        # part_sum - the function
+        # (starti, endi) - tuple with arguments for part_sum
+        # () - tuple with functions on which function part_sum depends
+        # () - tuple with module names which must be
+        #      imported before part_sum execution
+        jobs.append(job_server.submit(part_sum, (starti, endi)))
+
+    # Retrieve all the results and calculate their sum
+    part_sum1 = sum([job() for job in jobs])
+    # Print the partial sum
+    print "Partial sum is", part_sum1, "| diff =", math.log(2) - part_sum1
+
+    print "Time elapsed: ", time.time() - start_time, "s"
+    print
+job_server.print_stats()
+
+# Parallel Python Software: http://www.parallelpython.com

# File pp_examples/quicksort.py

+#!/usr/bin/env python
+# File: sum_primes.py
+# Author: Vitalii Vanovschi
+# Desc: This program demonstrates parallel version of quicksort algorithm
+# implemented using pp module
+# Parallel Python Software: http://www.parallelpython.com
+
+import sys, random
+import pp
+
+
+def quicksort(a, n=-1, srv=None):
+    if len(a) <= 1:
+        return a
+    if n:
+        return quicksort([x for x in a if x < a[0]], n-1, srv) \
+                + [a[0]] + quicksort([x for x in a[1:] if x >= a[0]], n-1, srv)
+    else:
+        return [srv.submit(quicksort, (a,))]
+
+
+print """Usage: python quicksort.py [ncpus]
+    [ncpus] - the number of workers to run in parallel,
+    if omitted it will be set to the number of processors in the system
+"""
+
+# tuple of all parallel python servers to connect with
+#ppservers = ("*",)
+#ppservers = ("10.0.0.1",)
+ppservers = ()
+
+if len(sys.argv) > 1:
+    ncpus = int(sys.argv[1])
+    # Creates jobserver with ncpus workers
+    job_server = pp.Server(ncpus, ppservers=ppservers)
+else:
+    # Creates jobserver with automatically detected number of workers
+    job_server = pp.Server(ppservers=ppservers)
+
+print "Starting pp with", job_server.get_ncpus(), "workers"
+
+n = 1000000
+input = []
+for i in xrange(n):
+    input.append(random.randint(0,100000))
+
+# set n to a positive integer to create 2^n PP jobs
+# or to -1 to avoid using PP
+
+# 32 PP jobs
+n = 5
+
+# no PP
+#n = -1
+
+outputraw = quicksort(input, n, job_server)
+
+output = []
+for x in outputraw:
+    if callable(x):
+        output.extend(x())
+    else:
+        output.append(x)
+
+print "first 30 numbers in increasing order:", output[:30]
+
+job_server.print_stats()
+
+# Parallel Python Software: http://www.parallelpython.com

# File pp_examples/reverse_md5.py

+#!/usr/bin/env python
+# File: reverse_md5.py
+# Author: Vitalii Vanovschi
+# Desc: This program demonstrates parallel computations with pp module
+# It tries to reverse an md5 hash in parallel
+# Parallel Python Software: http://www.parallelpython.com
+
+import math
+import sys
+import md5
+import pp
+
+
+def md5test(hash, start, end):
+    """Calculates md5 of the integerss between 'start' and 'end' and
+       compares it with 'hash'"""
+    for x in xrange(start, end):
+        if md5.new(str(x)).hexdigest() == hash:
+            return x
+
+
+print """Usage: python reverse_md5.py [ncpus]
+    [ncpus] - the number of workers to run in parallel,
+    if omitted it will be set to the number of processors in the system
+"""
+
+# tuple of all parallel python servers to connect with
+#ppservers = ("*",) # auto-discover
+#ppservers = ("10.0.0.1","10.0.0.2") # list of static IPs
+ppservers = ()
+
+if len(sys.argv) > 1:
+    ncpus = int(sys.argv[1])
+    # Creates jobserver with ncpus workers
+    job_server = pp.Server(ncpus, ppservers=ppservers)
+else:
+    # Creates jobserver with automatically detected number of workers
+    job_server = pp.Server(ppservers=ppservers)
+
+print "Starting pp with", job_server.get_ncpus(), "workers"
+
+#Calculates md5 hash from the given number
+hash = md5.new("1829182").hexdigest()
+print "hash =", hash
+#Now we will try to find the number with this hash value
+
+start = 1
+end = 2000000
+
+# Since jobs are not equal in the execution time, division of the problem
+# into a 128 of small subproblems leads to a better load balancing
+parts = 128
+
+step = (end - start) / parts + 1
+jobs = []
+
+for index in xrange(parts):
+    starti = start+index*step
+    endi = min(start+(index+1)*step, end)
+    # Submit a job which will test if a number in the range starti-endi
+    # has given md5 hash
+    # md5test - the function
+    # (hash, starti, endi) - tuple with arguments for md5test
+    # () - tuple with functions on which function md5test depends
+    # ("md5",) - tuple with module names which must be imported before
+    # md5test execution
+    # jobs.append(job_server.submit(md5test, (hash, starti, endi),
+    # globals=globals()))
+    jobs.append(job_server.submit(md5test, (hash, starti, endi),
+            (), ("md5", )))
+
+# Retrieve results of all submited jobs
+for job in jobs:
+    result = job()
+    if result:
+        break
+
+# Print the results
+if result:
+    print "Reverse md5 for", hash, "is", result
+else:
+    print "Reverse md5 for", hash, "has not been found"
+
+job_server.print_stats()
+
+# Properly finalize all tasks (not necessary)
+job_server.wait()
+
+# Parallel Python Software: http://www.parallelpython.com

# File pp_examples/sum_primes.py

+#!/usr/bin/env python
+# File: sum_primes.py
+# Author: Vitalii Vanovschi
+# Desc: This program demonstrates parallel computations with pp module
+# It calculates the sum of prime numbers below a given integer in parallel
+# Parallel Python Software: http://www.parallelpython.com
+
+import math
+import sys
+from pp import pp
+
+
+def isprime(n):
+    """Returns True if n is prime and False otherwise"""
+    if not isinstance(n, int):
+        raise TypeError("argument passed to is_prime is not of 'int' type")
+    if n < 2:
+        return False
+    if n == 2:
+        return True
+    max = int(math.ceil(math.sqrt(n)))
+    i = 2
+    while i <= max:
+        if n % i == 0:
+            return False
+        i += 1
+    return True
+
+
+def sum_primes(n):
+    """Calculates sum of all primes below given integer n"""
+    return sum([x for x in xrange(2, n) if isprime(x)])
+
+
+print """Usage: python sum_primes.py [ncpus]
+    [ncpus] - the number of workers to run in parallel,
+    if omitted it will be set to the number of processors in the system"""
+
+# tuple of all parallel python servers to connect with
+ppservers = ()
+#ppservers = ("127.0.0.1:60000", )
+
+if len(sys.argv) > 1:
+    ncpus = int(sys.argv[1])
+    # Creates jobserver with ncpus workers
+    job_server = pp.Server(ncpus, ppservers=ppservers)
+else:
+    # Creates jobserver with automatically detected number of workers
+    job_server = pp.Server(ppservers=ppservers)
+
+print "Starting pp with", job_server.get_ncpus(), "workers"
+
+# Submit a job of calulating sum_primes(100) for execution.
+# sum_primes - the function
+# (100,) - tuple with arguments for sum_primes
+# (isprime,) - tuple with functions on which function sum_primes depends
+# ("math",) - tuple with module names which must be imported before
+#             sum_primes execution
+# Execution starts as soon as one of the workers will become available
+job1 = job_server.submit(sum_primes, (100, ), (isprime, ), ("math", ))
+
+# Retrieves the result calculated by job1
+# The value of job1() is the same as sum_primes(100)
+# If the job has not been finished yet, execution will
+# wait here until result is available
+result = job1()
+
+print "Sum of primes below 100 is", result
+
+
+# The following submits 8 jobs and then retrieves the results
+inputs = (100000, 100100, 100200, 100300, 100400, 100500, 100600, 100700)
+jobs = [(input, job_server.submit(sum_primes, (input, ), (isprime, ),
+        ("math", ))) for input in inputs]
+
+for input, job in jobs:
+    print "Sum of primes below", input, "is", job()
+
+job_server.print_stats()
+
+# Parallel Python Software: http://www.parallelpython.com

# File pp_examples/sum_primes_functor.py

+#!/usr/bin/env python
+# File: sum_primes_template.py
+# Author: Vitalii Vanovschi
+# Desc: This program demonstrates using pp template class
+# It calculates the sum of prime numbers below a given integer in parallel
+# Parallel Python Software: http://www.parallelpython.com
+
+import math, sys
+import pp
+
+
+def isprime(n):
+    """Returns True if n is prime and False otherwise"""
+    if not isinstance(n, int):
+        raise TypeError("argument passed to is_prime is not of 'int' type")
+    if n < 2:
+        return False
+    if n == 2:
+        return True
+    max = int(math.ceil(math.sqrt(n)))
+    i = 2
+    while i <= max:
+        if n % i == 0:
+            return False
+        i += 1
+    return True
+
+
+def sum_primes(n):
+    """Calculates sum of all primes below given integer n"""
+    return sum([x for x in xrange(2,n) if isprime(x)])
+
+
+print """Usage: python sum_primes.py [ncpus]
+    [ncpus] - the number of workers to run in parallel,
+    if omitted it will be set to the number of processors in the system
+"""
+
+# tuple of all parallel python servers to connect with
+#ppservers = ("*",) # auto-discover
+#ppservers = ("10.0.0.1","10.0.0.2") # list of static IPs
+ppservers = ()
+
+if len(sys.argv) > 1:
+    ncpus = int(sys.argv[1])
+    # Creates jobserver with ncpus workers
+    job_server = pp.Server(ncpus, ppservers=ppservers)
+else:
+    # Creates jobserver with automatically detected number of workers
+    job_server = pp.Server(ppservers=ppservers)
+
+print "Starting pp with", job_server.get_ncpus(), "workers"
+
+# Creates a template
+# Template is created using all the parameters of the jobs except
+# the arguments of the function
+# sum_primes - the function
+# (isprime,) - tuple with functions on which function sum_primes depends
+# ("math",) - tuple with module names which must be imported
+#             before sum_primes execution
+fn = pp.Template(job_server, sum_primes, (isprime,), ("math",))
+
+# Submit a job of calulating sum_primes(100) for execution using
+# previously created template
+# Execution starts as soon as one of the workers will become available
+job1 = fn.submit(100)
+
+# Retrieves the result calculated by job1
+# The value of job1() is the same as sum_primes(100)
+# If the job has not been finished yet,
+# execution will wait here until result is available
+result = job1()
+
+print "Sum of primes below 100 is", result
+
+# The following submits 8 jobs and then retrieves the results
+inputs = (100000, 100100, 100200, 100300, 100400, 100500, 100600, 100700)
+jobs = [(input, fn.submit(input)) for input in inputs]
+
+for input, job in jobs:
+    print "Sum of primes below", input, "is", job()
+
+job_server.print_stats()
+
+# Parallel Python Software: http://www.parallelpython.com

# File start.py

-//web.py based dashboard application
+#!/usr/bin/env python
+# File: sum_primes.py
+# Author: Vitalii Vanovschi
+# Desc: This program demonstrates parallel computations with pp module
+# It calculates the sum of prime numbers below a given integer in parallel
+# Parallel Python Software: http://www.parallelpython.com
+
+import math
+import sys
+from pp import pp
+sys.path.append("~/Documents/code/pp-web")
+
+
+def isprime(n):
+    """Returns True if n is prime and False otherwise"""
+    if not isinstance(n, int):
+        raise TypeError("argument passed to is_prime is not of 'int' type")
+    if n < 2:
+        return False
+    if n == 2:
+        return True
+    max = int(math.ceil(math.sqrt(n)))
+    i = 2
+    while i <= max:
+        if n % i == 0:
+            return False
+        i += 1
+    return True
+
+
+def sum_primes(n):
+    """Calculates sum of all primes below given integer n"""
+    return sum([x for x in xrange(2, n) if isprime(x)])
+
+
+print """Usage: python sum_primes.py [ncpus]
+    [ncpus] - the number of workers to run in parallel,
+    if omitted it will be set to the number of processors in the system"""
+
+# tuple of all parallel python servers to connect with
+ppservers = ()
+#ppservers = ("127.0.0.1:60000", )
+
+if len(sys.argv) > 1:
+    ncpus = int(sys.argv[1])
+    # Creates jobserver with ncpus workers
+    job_server = pp.Server(ncpus, ppservers=ppservers)
+else:
+    # Creates jobserver with automatically detected number of workers
+    job_server = pp.Server(ppservers=ppservers)
+
+print "Starting pp with", job_server.get_ncpus(), "workers"
+
+# Submit a job of calulating sum_primes(100) for execution.
+# sum_primes - the function
+# (100,) - tuple with arguments for sum_primes
+# (isprime,) - tuple with functions on which function sum_primes depends
+# ("math",) - tuple with module names which must be imported before
+#             sum_primes execution
+# Execution starts as soon as one of the workers will become available
+job1 = job_server.submit(sum_primes, (100, ), (isprime, ), ("math", ))
+
+# Retrieves the result calculated by job1
+# The value of job1() is the same as sum_primes(100)
+# If the job has not been finished yet, execution will
+# wait here until result is available
+result = job1()
+
+print "Sum of primes below 100 is", result
+
+
+# The following submits 8 jobs and then retrieves the results
+inputs = (100000, 100100, 100200, 100300, 100400, 100500, 100600, 100700)
+jobs = [(input, job_server.submit(sum_primes, (input, ), (isprime, ),
+        ("math", ))) for input in inputs]
+
+for input, job in jobs:
+    print "Sum of primes below", input, "is", job()
+
+job_server.print_stats()
+
+# Parallel Python Software: http://www.parallelpython.com