Python

String Manipulation

判断是否为字母, 数字 isalnum() isalpha() isnumeric()

Syntax

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# 判断是否整个string都由alpha and numbers 组成
str.isalnum()

# 判断是否整个string
str.isalpha()

Return Type

Boolean

Ex:

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# No space in string
>>> str = "this2018"
>>> str.isalnum()
True

# Space in string
>>> str = "this is..."
>>> str.isalnum()
False

# Check isalpha()
>>> str = "this2018"
>>> str.isalpha()
False