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pythonlistsumzipincrement

Comparing two Lists using Zip function in Python

I am comparing two lists together and if they match I want to increment a counter. Right now the counter is saying 0 each time I print it out even though there should be some matches. Both lists have data within them as well because I can print them out. Below is the code that I am using to find a match in the lists and increment if they do match. What could be going wrong?

numCorrect = sum(1 for a, b in zip(trueLabels, predLabels) if a == b)

Any advice helps, Thanks

Solution

  • Your code works well:

    trueLabels = [1, 2, 3, 4, 5]
predLabels = [1, 2, 4, 4, 5]

numCorrect = sum(1 for a, b in zip(trueLabels, predLabels) if a == b)
print(numCorrect)
# 4

    You may have shifted indices in your list(s).