Q:

Python: create file if file does not exist in list

I'm getting a list of files in a project, which can all range from src/app.ts to src/component/app/app.ts. What I'm looking to do is:

loop over each file in the list, 
see if it matches a pattern of a specific config, 
and if the file does not exist, write it to disk. 

Currently I have:
m = re.compile(r'(ts|js)config.json$')
for file in files:
    if m.search(file):
        return True
    else:
        self.writeFile()

Which works, but it calls write multiple times when there is not match.
How would I only call write after the checks are done? 

A:

You could just unindent your else block so it applies to for:
for file in files:
    if m.search(file):
        return True
else:
    self.writeFile()

note that in that case it's not as interesting as with the break case, you could simply write:
for file in files:
    if m.search(file):
        return True
self.writeFile()

since if pattern matches it returns so writeFile is not reached.

