| [pluggy](https://github.com/pytest-dev/pluggy) | Plugin and hook calling mechanisms for python. |
| [pluggy](https://github.com/pytest-dev/pluggy) | Plugin and hook calling mechanisms for python. |
| [pudb](https://pypi.python.org/pypi/pudb) | PuDB is a full-screen, console-based visual debugger for Python. |
| [pudb](https://pypi.python.org/pypi/pudb) | PuDB is a full-screen, console-based visual debugger for Python. |
| [pyparsing](http://pyparsing.wikispaces.com) | The pyparsing module provides a library of classes that client code uses to construct the grammar directly in Python code. |
| [pyparsing](http://pyparsing.wikispaces.com) | The pyparsing module provides a library of classes that client code uses to construct the grammar directly in Python code. |
| [pytest](http://pytest.org) | Simple powerful testing with Python |
| [python-dateutil](https://github.com/dateutil/dateutil) | Useful extensions to the standard Python datetime features. |
| [python-dateutil](https://github.com/dateutil/dateutil) | Useful extensions to the standard Python datetime features. |
| [pytz](http://pytz.sourceforge.net/) | pytz brings the Olson tz database into Python. This library allows accurate and cross platform timezone calculations using Python 2.4 or higher. |
| [pytz](http://pytz.sourceforge.net/) | pytz brings the Olson tz database into Python. This library allows accurate and cross platform timezone calculations using Python 2.4 or higher. |
| [scipy](https://github.com/jupyter/testpath) | Test utilities for code working with files and commands |
| [scipy](https://github.com/jupyter/testpath) | Test utilities for code working with files and commands |