技術標籤：Python環境及其實用操作python

文章目錄

• • 方法一:通過isinstance函式來實現
  • 方法二:通過unicodedata模組來實現

方法一:通過isinstance函式來實現

具體程式碼

def whether_number(s):
    if  isinstance(s,float):
        return True
    elif  isinstance(s,int):
        return True
    else:
        return False
print(whether_number('nan'))
print(whether_number(
 
'1'))
print(whether_number('一'))
print(whether_number(-9.9))
print(whether_number(1))
print(whether_number(1.1))
print(whether_number(1e2))

執行結果

方法二:通過unicodedata模組來實現

unicodedata模組是可以通過丟擲的異常來檢測它是否為數字，這種方法如果字串裡面有數字依然能夠通過。
具體程式碼

def whether_number(s):
    try:
        float(s)
        return True
    except
 
 ValueError:
        pass
    try:
        import unicodedata
        unicodedata.numeric(s)
        return True
    except (TypeError, ValueError):

        pass
    return False
print(whether_number('nan'))
print(whether_number('1'))
print(whether_number('一'))
print(whether_number(-9.9))
print(whether_number(
 
1))
print(whether_number(1.1))
print(whether_number(1e9))

執行結果

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