CODEWITHSUNDEEP
pythonmaxvalueerroris-empty
joacokp
joacokp

Reputation: 29

ValueError: max() arg is an empty sequence. Don't know why happens

When I compile it this error appears. ValueError: max() arg is an empty sequence.

ag_averaged = [max(a_g[i_averaged[i]:i_averaged[i+1]]) for i in range(len(i_averaged)-1)]

Honestly I have no idea why this ocurrs

Upvotes: 0

Views: 2055

Answers (2)

Emeka Boris Ama
Emeka Boris Ama

Reputation: 467

Pls add load() after importing the library

Upvotes: -1

Zecong Hu
Zecong Hu

Reputation: 3194

As the error message says, it's because the sequence that you passed to max has zero length. In your case, i_averaged[i] might be equal to i_averaged[i + 1] on some occasion, which gives a slice of length zero. To prevent it from raising an exception, you can provide a default value for the max function:

max(a_g[i_averaged[i]:i_averaged[i+1]], default=None)

Now it returns None when the list is empty. Of course, it might not benefit you as the maximum value of a list of zero length might not be meaningful in your application. It is now your responsibility to ensure that the value makes sense.

Upvotes: 2

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