jpp

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jpp has asked 48 questions and find answers to 1021 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

In datetime, why is `year` a property, but `weekday()` a function?
TypeError: unhashable type: 'slice' pandas DataFrame column
Returning the minimum value in a JSON array
Getting Pandas DataFrame label indices from multiple columns
If list X element is present on list Y, slice list X before its position
Sort a list by frequency and value
Pandas merging selected columns into 1
Sort words alphabetically in each row of a dataframe python
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?