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jpp has asked 48 questions and find answers to 1080 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

count elements in pandas dataframe with gropuby and attach them to existing dataframe
Finding maximum frequency of a specific column
Replace string with numeric values based on dictionary
get a list of specific value from a list of dictionaries without using for loops or if conditions only if necessary
Save list of numpy arrays onto disk
pandas - Groupby two functions
Delete Column Rows with Any Numeric Substrings
Numpy Where with more than 2 conditions
Pandas.read_csv: backslash delimiter required?
Pandas: Grouping rows with same key in one row