sandbox/doc-theme / Misc / BLURB

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What is Python?
---------------

Python is an interpreted, interactive, object-oriented programming
language.  It incorporates modules, exceptions, dynamic typing, very
high level dynamic data types, and classes.  Python combines
remarkable power with very clear syntax.  It has interfaces to many
system calls and libraries, as well as to various window systems, and
is extensible in C or C++.  It is also usable as an extension language
for applications that need a programmable interface.  Finally, Python
is portable: it runs on many brands of UNIX, on the Mac, and on
MS-DOS.

As a short example of what Python looks like, here's a script to
print prime numbers (not blazingly fast, but readable!).  When this
file is made executable, it is callable directly from the UNIX shell
(if your system supports #! in scripts and the python interpreter is
installed at the indicated place).

#!/usr/local/bin/python

# Print prime numbers in a given range

def main():
	import sys
	min, max = 2, 0x7fffffff
	if sys.argv[1:]:
		min = int(eval(sys.argv[1]))
		if sys.argv[2:]:
			max = int(eval(sys.argv[2]))
	primes(min, max)

def primes(min, max):
	if 2 >= min: print 2
	primes = [2]
	i = 3
	while i <= max:
		for p in primes:
			if i%p == 0 or p*p > i: break
		if i%p <> 0:
			primes.append(i)
			if i >= min: print i
		i = i+2

main()
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