jpp

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jpp has asked 47 questions and find answers to 1006 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

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
Create a categorical column based on different binary columns in python
key function for heapq.nlargest()
Selecting rows of a data frame when the column of the dataframe contains multiple values
Select n items by sequence of a list repeatedly in python
Pandas: improve running time looping over string contains substring
Equally spaced elements between two given number
Extract and count unique hashtags per row from a pandas dataframe