Search for a partial string in a list of strings

I have a list of strings looking like this:

['MEASUREMENT   K02313  New York',\
 'MEASUREMENT   K02338  London [BC:2.7.7.7]',\
 'MEASUREMENT   K14761  Kairo [BC:1.2.-.-]',\
 'MEASUREMENT   K03629  Berlin',\
 'MEASUREMENT   K02470  Paris [BC:5.6.2.-]',\
 'MEASUREMENT   K02469  Madrid [BC:5.43.2.2]',\
....]

As you can see some elements in the list have a string with the format BC:x.x.x.x, with x either being a number from 0-999 or a hyphen ("-").
Now I want to get a seperate list that has all of these BC:x.x.x.x elements saved.
I tried using a regular expression:

re.findall(r"BC:([0-9]|[1-9][0-9]|[1-9][0-9][0-9]|-).([0-9]|[1-9][0-9]|[1-9][0-9][0-9]|-).([0-9]|[1-9][0-9]|[1-9][0-9][0-9]|-).([0-9]|[1-9][0-9]|[1-9][0-9][0-9]|-)", list_name)

but it doesn’t work, I get the following error message:

TypeError: expected string or bytes-like object

>Solution :

Your code doesn’t work because you’re currently passing a tuple of strings to the re.findall method. If you want to use a single command, then transform your tuple of strings into a single string:

re.findall(r"BC:[\d\.]+", ' '.join(list_name))