jpp

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jpp has asked 47 questions and find answers to 1013 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

Faster way to change dataframe's row value based upon condition
How do I check membership of items in a dict and list, within nested for loops?
How do I sort this list of tuples by both values?
Creating a nested dictionary from pandas dataframe
Is there a way to create a list comprehension from this?
TypeError: unsupported operand type(s) for &: 'str' and 'bool'
How to create columns based on combinations of values between 2 sets of columns?
Comparing pd.Series and getting, what appears to be, unusual results when the series contains None
remove extra characters in all data points in a dataframe
Pandas - Based on top x% value of each column, Mark as new number