Regular expression to match start of filename and filename extension

Question

What is the regular expression to match strings (in this case, file names) that start with \'Run\' and have a filename extension of \'.py\'?

The regular expression s

Answer 1

Warning:

• jobscry's answer ("^Run.?.py$") is incorrect (will not match "Run123.py", for example).
• orlandu63's answer ("/^Run[\w]*?.py$/") will not match "RunFoo.Bar.py".

(I don't have enough reputation to comment, sorry.)

Answer 2

/^Run.*\.py$/

Or, in python specifically:

import re
re.match(r"^Run.*\.py$", stringtocheck)

This will match "Runfoobar.py", but not "runfoobar.PY". To make it case insensitive, instead use:

re.match(r"^Run.*\.py$", stringtocheck, re.I)