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Description:

pdhelper 1.0.0

pd-helper
A helpful package to streamline Pandas DataFrame optimization.
Save 50-75% on DataFrame memory usage by running the optimizer.
Autoconfigure dtypes for appropriate data types in each column with helper.
Generate a random DataFrame of controlled random variables for testing with maker.
Install
pip install pd-helper

Basic Usage to Iterate over DataFrame
from pd_helper.maker import MakeData
from pd_helper.helper import optimize
faker = MakeData()

if __name__ == "__main__":
# MakeData() generates a fake dataframe, convenient for testing
df = faker.make_df()
df = optimize(df)

Better Usage With Multiprocessing
from pd_helper.maker import MakeData
from pd_helper.helper import optimize
faker = MakeData()

if __name__ == "__main__":
# MakeData() generates a fake dataframe, convenient for testing
df = faker.make_df()
df = optimize(df, enable_mp=True)

Specify Special Mappings
from pd_helper.maker import MakeData
from pd_helper.helper import optimize
faker = MakeData()

if __name__ == "__main__":
# MakeData() generates a fake dataframe, convenient for testing
df = faker.make_df()
special_mappings = {'string': ['object_id'],
'category': ['item_name']}

# special mappings will be applied instead of by optimize ruleset, they will be returned.
df = optimize(df
, enable_mp=True,
special_mappings=special_mappings
)

Sample Results with Helper
Starting with 175.63 MB memory.

After optmization.

Ending with 65.33 MB memory.

Generating a Randomly Imperfect DataFrame with Maker
Maker provides a class, MakeData(), to generate a table of made-up records.
Each row is an event where an item was retrieved.
Options to make the table imperfectly random in various ways.
Sample table below:

Retrieved Date
Item Name
Retrieved
Condition
Sector

Example
2019-01-01, 2019-03-4
Toaster, Lighter
True, False
Junk, Excellent
1, 2

Data Type
String
String
String
String
Integer

References

Pandas Categorical: https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Categorical.html

Pandas Pickle: https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.to_pickle.html

Pandas CSV: https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.read_csv.html

Pandas Datetime: https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.to_datetime.html

TODO

Improve efficiency of iterating on DataFrame.

Allow user to toggle logging.

Provide tools for imputing missing data.