.. _f-dataframehelpers:

module ``df.dataframe_helpers``
===============================







Short summary
+++++++++++++

module ``pandas_streaming.df.dataframe_helpers``

Helpers for dataframes.


:githublink:`%|py|6`






Functions
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+-----------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------+
| function                                                                                      | truncated documentation                                                                                                  |
+===============================================================================================+==========================================================================================================================+
| :func:`dataframe_hash_columns <pandas_streaming.df.dataframe_helpers.dataframe_hash_columns>` | Hashes a set of columns in a dataframe. Keeps the same type. Skips missing values.                                       |
+-----------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------+
| :func:`dataframe_shuffle <pandas_streaming.df.dataframe_helpers.dataframe_shuffle>`           | Shuffles a dataframe.                                                                                                    |
+-----------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------+
| :func:`dataframe_unfold <pandas_streaming.df.dataframe_helpers.dataframe_unfold>`             | One column may contain concatenated values. This function splits these values and multiplies the rows for each split ... |
+-----------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------+
| :func:`hash_float <pandas_streaming.df.dataframe_helpers.hash_float>`                         | Hashes a float into a float.                                                                                             |
+-----------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------+
| :func:`hash_int <pandas_streaming.df.dataframe_helpers.hash_int>`                             | Hashes an integer into an integer.                                                                                       |
+-----------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------+
| :func:`hash_str <pandas_streaming.df.dataframe_helpers.hash_str>`                             | Hashes a string.                                                                                                         |
+-----------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------+
| :func:`numpy_types <pandas_streaming.df.dataframe_helpers.numpy_types>`                       | Returns the list of :epkg:`numpy` available types.                                                                       |
+-----------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------+
| :func:`pandas_fillna <pandas_streaming.df.dataframe_helpers.pandas_fillna>`                   | Replaces the :epkg:`nan` values for something not :epkg:`nan`. Mostly used by :func:`pandas_groupby_nan`.                |
+-----------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------+
| :func:`pandas_groupby_nan <pandas_streaming.df.dataframe_helpers.pandas_groupby_nan>`         | Does a *groupby* including keeping missing values (:epkg:`nan`).                                                         |
+-----------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------+








Documentation
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.. automodule:: pandas_streaming.df.dataframe_helpers
    :members:
    :special-members: __init__
    :show-inheritance: