file.py 文件源码

def compare(fname1, fname2, binary_mode=False):
    if binary_mode:
        return cmp(fname1, fname2, shallow=False)

    f1 = open(fname1, 'r')
    f2 = open(fname2, 'r')

    while True:
        line1 = f1.readline()
        line2 = f2.readline()

        # if one of files had already ended then for sure it's not equal
        if not line1 and line2 or line1 and not line2:
            return False

        # if both files ended at the same time then these are equal
        if not line1 and not line2:
            return True

        # if given line doesn't match then files are not equal
        if line1.strip() != line2.strip():
            return False