Update python version for standard library

README.md

@@ -311,8 +311,8 @@ Inspired by [awesome-php](https://github.com/ziadoz/awesome-php).
 
 * [eventlet](http://eventlet.net/) - Asynchronous framework with WSGI support.
 * [gevent](http://www.gevent.org/) - A coroutine-based Python networking library that uses [greenlet](https://github.com/python-greenlet/greenlet).
-* [multiprocessing](https://docs.python.org/2/library/multiprocessing.html) - (Python standard library) Process-based "threading" interface.
+* [multiprocessing](https://docs.python.org/3/library/multiprocessing.html) - (Python standard library) Process-based "threading" interface.
-* [threading](https://docs.python.org/2/library/threading.html) - (Python standard library) Higher-level threading interface.
+* [threading](https://docs.python.org/3/library/threading.html) - (Python standard library) Higher-level threading interface.
 * [Tomorrow](https://github.com/madisonmay/Tomorrow) - Magic decorator syntax for asynchronous code.
 * [uvloop](https://github.com/MagicStack/uvloop) - Ultra fast implementation of asyncio event loop on top of libuv.
 
@@ -320,9 +320,9 @@ Inspired by [awesome-php](https://github.com/ziadoz/awesome-php).
 
 *Libraries for storing and parsing configuration options.*
 
-* [config](https://www.red-dove.com/config-doc/) - Hierarchical config from the author of [logging](https://docs.python.org/2/library/logging.html).
+* [config](https://www.red-dove.com/config-doc/) - Hierarchical config from the author of [logging](https://docs.python.org/3/library/logging.html).
 * [ConfigObj](http://www.voidspace.org.uk/python/configobj.html) - INI file parser with validation.
-* [ConfigParser](https://docs.python.org/2/library/configparser.html) - (Python standard library) INI file parser.
+* [ConfigParser](https://docs.python.org/3/library/configparser.html) - (Python standard library) INI file parser.
 * [profig](http://profig.readthedocs.org/en/default/) - Config from multiple formats with value conversion.
 * [python-decouple](https://github.com/henriquebastos/python-decouple) - Strict separation of settings from code.
 
@@ -411,7 +411,7 @@ Inspired by [awesome-php](https://github.com/ziadoz/awesome-php).
 *Libraries for working with dates and times.*
 
 * [Chronyk](https://github.com/KoffeinFlummi/Chronyk) - A Python 3 library for parsing human-written times and dates.
-* [dateutil](https://github.com/dateutil/dateutil) - Extensions to the standard Python [datetime](https://docs.python.org/2/library/datetime.html) module.
+* [dateutil](https://github.com/dateutil/dateutil) - Extensions to the standard Python [datetime](https://docs.python.org/3/library/datetime.html) module.
 * [delorean](https://github.com/myusuf3/delorean/) - A library for clearing up the inconvenient truths that arise dealing with datetimes.
 * [moment](https://github.com/zachwill/moment) - A Python library for dealing with dates/times. Inspired by [Moment.js](http://momentjs.com/).
 * [Pendulum](https://github.com/sdispater/pendulum) - Python datetimes made easy.
@@ -571,9 +571,9 @@ Inspired by [awesome-php](https://github.com/ziadoz/awesome-php).
 
 *Libraries for file manipulation and MIME type detection.*
 
-* [imghdr](https://docs.python.org/2/library/imghdr.html) - (Python standard library) Determine the type of an image.
+* [imghdr](https://docs.python.org/3/library/imghdr.html) - (Python standard library) Determine the type of an image.
-* [mimetypes](https://docs.python.org/2/library/mimetypes.html) - (Python standard library) Map filenames to MIME types.
+* [mimetypes](https://docs.python.org/3/library/mimetypes.html) - (Python standard library) Map filenames to MIME types.
-* [path.py](https://github.com/jaraco/path.py) - A module wrapper for [os.path](https://docs.python.org/2/library/os.path.html).
+* [path.py](https://github.com/jaraco/path.py) - A module wrapper for [os.path](https://docs.python.org/3/library/os.path.html).
 * [pathlib](https://pathlib.readthedocs.org/en/pep428/) - (Python standard library in Python 3.4+) An cross-platform, object-oriented path library.
 * [python-magic](https://github.com/ahupp/python-magic) - A Python interface to the libmagic file type identification library.
 * [Unipath](https://github.com/mikeorr/Unipath) - An object-oriented approach to file/directory operations.
@@ -584,7 +584,7 @@ Inspired by [awesome-php](https://github.com/ziadoz/awesome-php).
 *Libraries for providing foreign function interface.*
 
 * [cffi](https://pypi.python.org/pypi/cffi) - Foreign Function Interface for Python calling C code.
-* [ctypes](https://docs.python.org/2/library/ctypes.html) - (Python standard library) Foreign Function Interface for Python calling C code.
+* [ctypes](https://docs.python.org/3/library/ctypes.html) - (Python standard library) Foreign Function Interface for Python calling C code.
 * [PyCUDA](https://mathema.tician.de/software/pycuda/) - A Python wrapper for Nvidia's CUDA API.
 * [SWIG](http://www.swig.org/Doc1.3/Python.html) - Simplified Wrapper and Interface Generator.
 
@@ -611,7 +611,7 @@ Inspired by [awesome-php](https://github.com/ziadoz/awesome-php).
 
 *Libraries for working with graphical user interface applications.*
 
-* [curses](https://docs.python.org/2/library/curses.html#module-curses) - Built-in wrapper for [ncurses](http://www.gnu.org/software/ncurses/) used to create terminal GUI applications.
+* [curses](https://docs.python.org/3/library/curses.html) - Built-in wrapper for [ncurses](http://www.gnu.org/software/ncurses/) used to create terminal GUI applications.
 * [Eel](https://github.com/ChrisKnott/Eel) - Little library for making simple Electron-like offline HTML/JS GUI apps, with full access to Python capabilities and libraries.
 * [enaml](https://github.com/nucleic/enaml) - Creating beautiful user-interfaces with Declaratic Syntax like QML.
 * [Flexx](https://github.com/zoofIO/flexx) - Flexx is a pure Python toolkit for creating GUI's, that uses web technology for its rendering.
@@ -758,7 +758,7 @@ Inspired by [awesome-php](https://github.com/ziadoz/awesome-php).
 
 * [Eliot](https://github.com/ScatterHQ/eliot) - Logging for complex & distributed systems.
 * [logbook](http://logbook.readthedocs.io/en/stable/) - Logging replacement for Python.
-* [logging](https://docs.python.org/2/library/logging.html) - (Python standard library) Logging facility for Python.
+* [logging](https://docs.python.org/3/library/logging.html) - (Python standard library) Logging facility for Python.
 * [raven](https://github.com/getsentry/raven-python) - Python client for Sentry, a log/error tracking, crash reporting and aggregation platform for web applications.
 
 ## Machine Learning
@@ -955,7 +955,7 @@ Inspired by [awesome-php](https://github.com/ziadoz/awesome-php).
 *RPC-compatible servers.*
 
 * [SimpleJSONRPCServer](https://github.com/joshmarshall/jsonrpclib/) - This library is an implementation of the JSON-RPC specification.
-* [SimpleXMLRPCServer](https://docs.python.org/2/library/simplexmlrpcserver.html) - (Python standard library) Simple XML-RPC server implementation, single-threaded.
+* [SimpleXMLRPCServer](https://docs.python.org/3/library/xmlrpc.server.html) - (Python standard library) Simple XML-RPC server implementation, single-threaded.
 * [zeroRPC](https://github.com/0rpc/zerorpc-python) - zerorpc is a flexible RPC implementation based on [ZeroMQ](http://zeromq.org/) and [MessagePack](http://msgpack.org/).
 
 ## Science
@@ -1075,7 +1075,7 @@ Inspired by [awesome-php](https://github.com/ziadoz/awesome-php).
     * [nose2](https://github.com/nose-devs/nose2) - The successor to nose, based on unittest2.
     * [pytest](https://docs.pytest.org/en/latest/) - A mature full-featured Python testing tool.
     * [Robot Framework](https://github.com/robotframework/robotframework) - A generic test automation framework.
-    * [unittest](https://docs.python.org/2/library/unittest.html) - (Python standard library) Unit testing framework.
+    * [unittest](https://docs.python.org/3/library/unittest.html) - (Python standard library) Unit testing framework.
 * Test Runners
     * [green](https://github.com/CleanCut/green) - A clean, colorful test runner.
     * [tox](https://tox.readthedocs.io/en/latest/) - Auto builds and tests distributions in multiple Python versions
@@ -1114,7 +1114,7 @@ Inspired by [awesome-php](https://github.com/ziadoz/awesome-php).
 
 * General
     * [chardet](https://github.com/chardet/chardet) - Python 2/3 compatible character encoding detector.
-    * [difflib](https://docs.python.org/2/library/difflib.html) - (Python standard library) Helpers for computing deltas.
+    * [difflib](https://docs.python.org/3/library/difflib.html) - (Python standard library) Helpers for computing deltas.
     * [ftfy](https://github.com/LuminosoInsight/python-ftfy) - Makes Unicode text less broken and more consistent automagically.
     * [fuzzywuzzy](https://github.com/seatgeek/fuzzywuzzy) - Fuzzy String Matching.
     * [Levenshtein](https://github.com/ztane/python-Levenshtein/) - Fast computation of Levenshtein distance and string similarity.