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有人不知道是谁

#1 Created at ... [Delete] [Delete and Lock User]

分析问题所得，发现在自定义函数str2num定义中的系统函数int位置，系统函数int的参数为数字或能表示数字的其他形式，故需要做出优化：

def str2num(n):
    try:
        n = int(n)
    except ValueError as e:
        try:
            n = float(n)
        except ValueError as e:
            raise ValueError(r"'%s' is not literal" % n)
    return

有人不知道是谁

#2 Created at ... [Delete] [Delete and Lock User] 
def str2num(n):
    try:
        n = int(n)
    except ValueError as e:
        try:
            n = float(n)
        except ValueError as e:
            raise ValueError(r"'%s' not literal" % n)
    return n
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