DataProperty 0.13.2

Python library for extract property from data.

**DataProperty**

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.. contents:: Table of contents
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Summary
=======
Python library for extract property from data.


Installation
============

::

pip install DataProperty


Usage
=====

Extract property of data
------------------------

e.g. Extract `float` value property
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code:: python

from dataproperty import DataProperty
DataProperty(-1.0)

::

data=-1.0, typename=FLOAT, align=right, str_len=4, ascii_char_width=4, integer_digits=1, decimal_places=1, additional_format_len=1


e.g. Extract `int` value property
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code:: python

from dataproperty import DataProperty
DataProperty(123456789)

::

data=123456789, typename=INTEGER, align=right, str_len=9, ascii_char_width=9, integer_digits=9, decimal_places=0, additional_format_len=0

e.g. Extract `str` (ascii) value property
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code:: python

from dataproperty import DataProperty
DataProperty("sample string")

::

data=sample string, typename=STRING, align=left, str_len=13, ascii_char_width=13, integer_digits=nan, decimal_places=nan, additional_format_len=0

e.g. Extract `str` (multi-byte) value property
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code:: python

from dataproperty import DataProperty
DataProperty(u"吾輩は猫である")

data=吾輩は猫である, typename=STRING, align=left, str_len=7, ascii_char_width=14, integer_digits=nan, decimal_places=nan, additional_format_len=0

::

e.g. Extract time (`datetime`) value property
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code:: python

import datetime
from dataproperty import DataProperty
DataProperty(datetime.datetime(2017, 1, 1, 0, 0, 0))

::

data=2017-01-01 00:00:00, typename=DATETIME, align=left, str_len=19, ascii_char_width=19, integer_digits=nan, decimal_places=nan, additional_format_len=0

e.g. Extract `bool` value property
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code:: python

DataProperty(True)

::

data=True, typename=BOOL, align=left, str_len=4, ascii_char_width=4, integer_digits=nan, decimal_places=nan, additional_format_len=0


Extract for each data property from a matrix
----------------------------------------------------

.. code:: python

import datetime
from dataproperty import PropertyExtractor, Typecode

def display_dataprop(prop_matrix, name):
print()
print("---------- {:s} ----------".format(name))
for prop_list in prop_matrix:
print([getattr(prop, name) for prop in prop_list])

dt = datetime.datetime(2017, 1, 1, 0, 0, 0)
inf = float("inf")
nan = float("nan")
data_matrix = [
[1, 1.1, "aa", 1, 1, True, inf, nan, dt],
[2, 2.2, "bbb", 2.2, 2.2, False, "inf", "nan", dt],
[3, 3.33, "cccc", -3, "ccc", "true", inf, "NAN", "2017-01-01T01:23:45+0900"],
]
prop_extractor = PropertyExtractor()
prop_extractor.data_matrix = data_matrix
prop_matrix = prop_extractor.extract_data_property_matrix()

print("---------- typename ----------")
for prop_list in prop_matrix:
print([Typecode.get_typename(prop.typecode) for prop in prop_list])

display_dataprop(prop_matrix, "data")
display_dataprop(prop_matrix, "align")
display_dataprop(prop_matrix, "str_len")
display_dataprop(prop_matrix, "integer_digits")
display_dataprop(prop_matrix, "decimal_places")

::

---------- typename ----------
['INTEGER', 'FLOAT', 'STRING', 'INTEGER', 'INTEGER', 'BOOL', 'INFINITY', 'NAN', 'DATETIME']
['INTEGER', 'FLOAT', 'STRING', 'FLOAT', 'FLOAT', 'BOOL', 'INFINITY', 'NAN', 'DATETIME']
['INTEGER', 'FLOAT', 'STRING', 'INTEGER', 'STRING', 'BOOL', 'INFINITY', 'NAN', 'STRING']

---------- data ----------
[1, 1.1, 'aa', 1, 1, True, inf, nan, datetime.datetime(2017, 1, 1, 0, 0)]
[2, 2.2, 'bbb', 2.2, 2.2, False, inf, nan, datetime.datetime(2017, 1, 1, 0, 0)]
[3, 3.33, 'cccc', -3, 'ccc', True, inf, nan, '2017-01-01T01:23:45+0900']

---------- align ----------
[right, right, left, right, right, left, left, left, left]
[right, right, left, right, right, left, left, left, left]
[right, right, left, right, left, left, left, left, left]

---------- str_len ----------
[1, 3, 2, 1, 1, 4, 3, 3, 19]
[1, 3, 3, 3, 3, 5, 3, 3, 19]
[1, 4, 4, 2, 3, 4, 3, 3, 24]

---------- integer_digits ----------
[1, 1, nan, 1, 1, nan, nan, nan, nan]
[1, 1, nan, 1, 1, nan, nan, nan, nan]
[1, 1, nan, 1, nan, nan, nan, nan, nan]

---------- decimal_places ----------
[0, 1, nan, 0, 0, nan, nan, nan, nan]
[0, 1, nan, 1, 1, nan, nan, nan, nan]
[0, 2, nan, 0, nan, nan, nan, nan, nan]


Extract for each column property from a matrix
------------------------------------------------------

.. code:: python

import datetime
from dataproperty import PropertyExtractor, Typecode

def display_colprop(prop_list, name):
print()
print("---------- {:s} ----------".format(name))
print([getattr(prop, name) for prop in prop_list])

dt = datetime.datetime(2017, 1, 1, 0, 0, 0)
inf = float("inf")
nan = float("nan")
data_matrix = [
[1, 1.1, "aa", 1, 1, True, inf, nan, dt],
[2, 2.2, "bbb", 2.2, 2.2, False, "inf", "nan", dt],
[3, 3.33, "cccc", -3, "ccc", "true", inf, "NAN", "2017-01-01T01:23:45+0900"],
]

prop_extractor = PropertyExtractor()
prop_extractor.header_list = [
"int", "float", "str", "num", "mix", "bool", "inf", "nan", "time"]
prop_extractor.data_matrix = data_matrix
col_prop_list = prop_extractor.extract_column_property_list()

print("---------- typename ----------")
print([Typecode.get_typename(prop.typecode) for prop in col_prop_list])

display_colprop(col_prop_list, "align")
display_colprop(col_prop_list, "padding_len")
display_colprop(col_prop_list, "decimal_places")

::

---------- typename ----------
['INTEGER', 'FLOAT', 'STRING', 'FLOAT', 'STRING', 'BOOL', 'INFINITY', 'NAN', 'STRING']

---------- align ----------
[right, right, left, right, left, left, left, left, left]

---------- padding_len ----------
[3, 5, 4, 4, 3, 5, 3, 3, 24]

---------- decimal_places ----------
[0, 2, nan, 1, 1, nan, nan, nan, nan]


Dependencies
============

Python 2.7+ or 3.3+

- `python-dateutil <https://dateutil.readthedocs.io/en/stable/>`__
- `pytz <https://pypi.python.org/pypi/pytz/>`__
- `six <https://pypi.python.org/pypi/six/>`__

Test dependencies
-----------------

- `pytest <https://pypi.python.org/pypi/pytest>`__
- `pytest-runner <https://pypi.python.org/pypi/pytest-runner>`__
- `tox <https://pypi.python.org/pypi/tox>`__