jpp

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jpp has asked 43 questions and find answers to 823 problems.

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jpp questions

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
Efficiently return the index of the first value satisfying condition in array
Comparing numpy array with itself by element efficiently
Suppress key addition in collections.defaultdict
How to efficiently partial argsort Pandas dataframe across columns

jpp answers

Pandas -- Map values from one column to another column
How can I subtract 2 columns if another column's value is same in pandas dataframe
DataFrame, apply, lambda, list comprehension
Tuple (key, value) to dictionary ValueError: dictionary update sequence element #0 has length 6; 2 is required
Python pandas column convert minutes to second
Creating a dictionary from 2 lists with duplicate keys
Group list of numpy arrays based on shape. Pandas?
Python Pandas Update Conditional on DF2 Column Values
pandas DataFrame: get column item when the corresponding item in another column is greater than a value
Invalid syntax - Expression returning a string in f-String [duplicate]