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

My first attempt to answer with the use of regular expressions, I find it a great skill to practise, that reading other's code.

import re # import regular expressions
chuck_text = open("regex_sum_286723.txt")
numbers = []
Total = 0
for line in chuck_text:
    nmbrs = re.findall('[0-9]+', line)
    numbers = numbers + nmbrs 
for n in numbers:
    Total = Total + float(n)
print "Total = ", Total 

and thanx to Beer for the 'comprehension list' one liner, though his 'r' seems not needed, not sure what it does. But it reads beautifully, I get more confused reading two lots of loops like my answer

import re
print sum([int(i) for i in re.findall('[0-9]+',open("regex_sum_286723.txt").read())])

Answer 2

import re
print sum([int(i) for i in re.findall('[0-9]+',open(raw_input('What is the file you want to analyze?\n'),'r').read())])

You can compact it into one line, but this is only for fun!