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isfloatable() floatに変換できそうかどうか判定する関数

Last updated at Posted at 2021-11-10

isfloat()が文字列に優しくなかったり
ちょっと不便な感じだったので・・。

def isfloatable(value):
    if type(value) == float :
        return True
    elif type(value) == str or type(value) == int:
        try:
            float(value)
            return True
        except ValueError:
            return False
    else:
        return False
>>> print( isfloatable(10) )
True
>>> print( isfloatable("10") )
True
>>> print( isfloatable(10.1) )
True
>>> print( isfloatable("10.1") )
True
>>> print( isfloatable("10.1a") )
False
>>> print( isfloatable("a") )
False
>>> print( isfloatable("") )
False

参考

【Python】文字列が数値型(int・float)へ変換可能か判定する方法

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