Sum of strings extracted from text file using regex

Question

I am just learning python and need some help for my class assignment.

I have a file with text and numbers in it. Some lines have from one to three numbers and other

Answer 1

I dont know much python but I can give a simple solution. Try this

import re
hand = open('text_numbers.txt')
x=list()
for line in hand:
    y=re.findall('[0-9]+',line)
    x=x+y
sum=0
for i in x:
    sum=sum + int(i)
print sum