前言
在程式中,需要對str(字元串)進行處理
使用
字元串與數字相乘
>>> a = "xyz"
>>> a * 2
'xyzxyz'
三引号(""""""/’’’’’’)的使用
示例1
>>> a = """c
... java
... python"""
>>> print(a)
c
java
python
示例2
>>> a = '''c
... java
... python'''
>>> print(a)
c
java
python
示例3
>>> a = """I don't know"""
>>> print(a)
I don't know
格式化字元串
方法1
''含有%s的字元串" % “要插入的字元串”
- 示例
>>> a = "uvw%sxyz" % "nature"
>>> print(a)
uvwnaturexyz
方法2
“含有{}的字元串”.format(“要插入的字元串”)
- 示例
>>> a = "uvw{}xyz".format("nature")
>>> print(a)
uvwnaturexyz
切片
>>> a = 'uvwnaturexyz'
>>> a[:3]
'uvw'
>>> a[-3:]
'xyz'
去掉字元串的空格符、制表符(\t)、換行符(\n、\r\n)等
方法
str.split()
示例
> python
Python 3.8.2 (tags/v3.8.2:7b3ab59, Feb 25 2020, 23:03:10) [MSC v.1916 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> confirm = "version\t8.0.23\r\n"
>>> confirm.split()
['version', '8.0.23']
去掉字元串的"
方法
str.replace(’"’, ‘’)
示例
>>> confirm = '"nature'
>>> print(confirm.replace('\"', ''))
nature