更新時間:2018-08-03 來源:黑馬程序員 瀏覽量:
num = "1" #unicode
num.isdigit() # True
num.isdecimal() # True
num.isnumeric() # True
num = "1" # 全角
num.isdigit() # True
num.isdecimal() # True
num.isnumeric() # True
num = b"1" # byte
num.isdigit() # True
num.isdecimal() # AttributeError 'bytes' object has no attribute 'isdecimal'
num.isnumeric() # AttributeError 'bytes' object has no attribute 'isnumeric'
num = "IV" # 羅馬數(shù)字
num.isdigit() # True
num.isdecimal() # False
num.isnumeric() # True
num = "四" # 漢字
num.isdigit() # False
num.isdecimal() # False
num.isnumeric() # True
===================
isdigit()
True: Unicode數(shù)字,byte數(shù)字(單字節(jié)),全角數(shù)字(雙字節(jié)),羅馬數(shù)字
False: 漢字數(shù)字
Error: 無
isdecimal()
True: Unicode數(shù)字,,全角數(shù)字(雙字節(jié))
False: 羅馬數(shù)字,漢字數(shù)字
Error: byte數(shù)字(單字節(jié))
isnumeric()
True: Unicode數(shù)字,全角數(shù)字(雙字節(jié)),羅馬數(shù)字,漢字數(shù)字
False: 無
Error: byte數(shù)字(單字節(jié))
================
import unicodedata
unicodedata.digit("2") # 2
unicodedata.decimal("2") # 2
unicodedata.numeric("2") # 2.0
unicodedata.digit("2") # 2
unicodedata.decimal("2") # 2
unicodedata.numeric("2") # 2.0
unicodedata.digit(b"3") # TypeError: must be str, not bytes
unicodedata.decimal(b"3") # TypeError: must be str, not bytes
unicodedata.numeric(b"3") # TypeError: must be str, not bytes
unicodedata.digit("Ⅷ") # ValueError: not a digit
unicodedata.decimal("Ⅷ") # ValueError: not a decimal
unicodedata.numeric("Ⅷ") # 8.0
unicodedata.digit("四") # ValueError: not a digit
unicodedata.decimal("四") # ValueError: not a decimal
unicodedata.numeric("四") # 4.0
#"〇","零","一","壱","二","弐","三","參","四","五","六","七","八","九","十","廿","卅","卌","百","千","萬","萬","億"
作者:黑馬程序員人工智能+python培訓學院
首發(fā):http://python.itheima.com/