Web Reference: The "Length of values does not match length of index" error is Pandas enforcing dimensional consistency. When adding a new column with a list or NumPy array, its length must equal len(df). Nov 22, 2021 · In this article we will fix the error: The length of values does not match the length of the index in Python. Cases of this error occurrence: The error comes up when you are trying to assign a list of numpy array of different length to a data frame, and it can be reproduced as follows: A data frame of four rows:
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