| [pandas](https://pypi.python.org/pypi/pandas) | Powerful data structures for data analysis, time series,and statistics. |
| [pandas](https://pypi.python.org/pypi/pandas) | Powerful data structures for data analysis, time series,and statistics. |
| [pybtex](https://pypi.python.org/pypi/pybtex) | A BibTeX-compatible bibliography processor in Python. |
| [pybtex](https://pypi.python.org/pypi/pybtex) | A BibTeX-compatible bibliography processor in Python. |
| [PyDispatcher](https://pypi.python.org/pypi/PyDispatcher) | Multi-producer-multi-consumer signal dispatching mechanism. |
| [PyDispatcher](https://pypi.python.org/pypi/PyDispatcher) | Multi-producer-multi-consumer signal dispatching mechanism. |
| [pymatgen](https://pypi.python.org/pypi/pymatgen) | Python Materials Genomics is a robust materials analysis code that defines core object representations for structures and molecules with support for many electronic structure codes. It is currently the core analysis code powering the Materials Project (https://www.materialsproject.org). |
| [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. |
| [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. |