Extract Number from String in Python

Question

I am new to Python and I have a String, I want to extract the numbers from the string. For example:

str1 = "3158 reviews" print (re.findall('\d+', str1 )) 

Output is ['4', '3']

I want to get 3158 only, as an Integer preferably, not as List.

Answer 1

You can filter the string by digits using str.isdigit method,

>>> int(filter(str.isdigit, str1)) 3158