Python 3.6 DeprecationWarning at import time

[Rudolph Froger]

Several regular expressions in sqlalchemy/dialects/postgresql/base.py and sqlalchemy/dialects/postgresql/ext.py cause a DeprecationWarning in Python 3.6 because regular expression escape sequences will only be allowed in a string literals prefixed with 'r'.

I did not run the tests yet for any other Python 3.6 warnings.

[Rudolph Froger]

For completeness see the relevant Python revision

[Mike Bayer]

yup additionally https://github.com/zzzeek/sqlalchemy/pull/337, looks like 3.6.0 is the law of the land now so I need to get CI up on this, thanks

[Mike Bayer]

the only warning im seeing so far is just any string that has a backslash without the "r". it's a very difficult warning to localize - it only occurs during parse (so .pyc screws it up). Then it raises a SyntaxError if the warnings filter is set to "error", strange.

[Mike Bayer]

Support python3.6

Corrects some warnings and adds tox config. Adds DeprecationWarning to the error category. Large sweep for string literals w/ backslashes as this is common in docstrings

Co-authored-by: Andrii Soldatenko Fixes: #3886 Change-Id: Ia7c838dfbbe70b262622ed0803d581edc736e085 Pull-request: https://github.com/zzzeek/sqlalchemy/pull/337

→ <<cset fa6dd376bb24>>

[Mike Bayer]

Support python3.6

Corrects some warnings and adds tox config. Adds DeprecationWarning to the error category. Large sweep for string literals w/ backslashes as this is common in docstrings

Co-authored-by: Andrii Soldatenko Fixes: #3886 Change-Id: Ia7c838dfbbe70b262622ed0803d581edc736e085 Pull-request: https://github.com/zzzeek/sqlalchemy/pull/337

→ <<cset 575ec4a5b8fd>>