Checking for string format using regex

Question

This is an easy question, but I am still getting stuck. I have a bunch of files and I have to check whether they are following this format.

abc_monthname[0-9]_v[0-9].xlsx

I have done some very generic like : r^[A-Za-z]+_[A-Za-z0-9]+_v[0-9]+\.xlsx$'' but this will fail for some cases. I want to give a strict rule. How do I achieve this in python?

For future reference, please avoid changing your question after answers have already been given. — Tim Biegeleisen
– Tim Biegeleisen, Commented Oct 17, 2022 at 1:46

Tim Biegeleisen · Accepted Answer · 2022-10-17 01:11:00Z

2

You probably want to use + quantifiers with the numeric portion of your regex:

^abc_monthname[0-9]+_v[0-9]+\.xlsx$

Note also that dot is a metacharacter and should be escaped with backslash. Here is a sample script

filename = "^abc_monthname123_v2.xslx"
if re.search(r'^abc_monthname[0-9]+_v[0-9]+\.xlsx$', filename):
    print("MATCH")

answered Oct 17, 2022 at 1:11

Tim Biegeleisen

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2 Comments

Meghna Panda Over a year ago

Something like :^[A-Za-z]+_[A-Za-z0-9]+_v[0-9]+\.xlsx$ Is this right?

Tim Biegeleisen Over a year ago

The answer to your question totally depends on what you are trying to match.

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