This pandas/computation is the module that provides functionality for computation and is discussed as follows:

• expressions.py: This provides fast expression evaluation through numexpr. The numexpr function is used to accelerate certain numerical operations. It uses multiple cores as well as smart chunking and caching speedups. It defines the evaluate(..) and where(..) methods. This module has been deprecated in the most recent version of pandas; the alternative usage will be through pandas.get_option.
• For more information on numexpr, go to https://code.google.com/p/numexpr/. For information on the usage of this module, go to http://pandas.pydata.org/pandas-docs/version/0.15.0/computation.html.