python read file

#python

def main():
    # read one time
    with open('files/11.data.txt', 'r') as f:
        print f.read()

    # read by for-in
    with open('files/11.data.txt', 'r') as f:
        for line in f:
            print line

    # read by readlines
    with open('files/11.data.txt') as f:
        lines = f.readlines()
        print lines



if __name__ == '__main__':
    main()

• result

123
234
123

234
['123\n', '234']