jpp

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jpp has asked 47 questions and find answers to 947 problems.

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jpp questions

Accessing methods via getattr
Pandas dataframe to structured array with Boolean series
Dot-multiplying large dense matrices of different dtype (float x boolean)
Accessing category codes for Index objects in Pandas
Tracking progress in python list(map(...))
Pandas vectorised function cumsum versus numpy
Optimal HDF5 dataset chunk shape for reading rows
Select Rows with Same Id but different Values in Pandas
NumPy indexing: broadcasting with Boolean arrays
Dask dataframes: reading multiple files & storing filename in column

jpp answers

Delete rows with dates before the required date point based on key value
Combination between lists ignoring elements within and list and ignoring ordering of pairs
Change sign of column based on condition
Deleting Duplicate Tuples of Lists from List
Pandas subtract series by iloc, not by index
Remove Column with Duplicate Values in Pandas
drop group by number of occurrence
Using list comprehension instead of function
Converting None values with pandas.to_datetime is unpredictable
Look up weighting dataframe and apply to a column