IO operations in python. Read and sum values in a file. Good practice problem for learning basic IO operations in python

learn_io.py

def Sum(filePath):
    total = 0
    with open(filePath,'rU') as f:
        line = f.readline()
        while(line != ''):
            value = int(line)
            total+=value
            line = f.readline()
    return total

if __name__ == '__main__':
    print Sum('temp.txt')

''' Sample temp.txt
temp.txt
*********
1
2
32
''''