If you are working with pandas and numpy, you might encounter a TypeError like this:
TypeError: ufunc ‘add’ did not contain a loop with signature matching types dtype (‘S21’) dtype (‘S21’) dtype (‘S21’)
This error means that you are trying to add two arrays with incompatible data types. For example, you might have an array of strings and an array of numbers, and you want to concatenate them with a separator character.
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