check if a file contains substring and ends with certain extension

Question

I am trying to use the python regular expression to check if a string contains some given substring and also ends with a certain expension

for example, given some_processed_file.mp4.gz , I want to check if processed is in the string and it ends with mp4.gz

But even doing something like:

x = 'some_processed_file.mp4.gz'
re.search(r'/processed/', x)

Even this returns None. I must confess I do not really understand regular expressions but I thought this should look for substring anywhere in the input string.

Answer 1

re.search('processed.*\.mp4\.gz', x)