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jpp has asked 48 questions and find answers to 1044 problems.

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jpp questions

Improving performance on comparison algorithm np.packbits(A==A[:, None], axis=1)
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

jpp answers

How do I compare a date column with a date and add a text column?
Python Pandas - Check if a value is in the top n rows
How to extract data from text field in pandas dataframe?
How to change a list of list to a dictionary of dictionary?
How to find values that occur specific number of times in Pandas Series?
Changing 2-dimensional list to standard matrix form
Best practices for indexing with pandas
Put Header and Dataframe into a new CSV
Pandas DataFrame.Apply output format
How to merge dictionaries of a pandas dataframe when grouping by rows