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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def expand_indent(line):
 r"""Return the amount of indentation. Tabs are expanded to the next multiple of 8. 4 8 8 16 """

    if '\t' not in line:
        return len(line) - len(line.lstrip())
    result = 0
    for char in line:
        if char == '\t':
            result = result // 8 * 8 + 8
        elif char == ' ':
            result += 1
        else:
            break
    return result