1.1 python字符串定义
- #!/usr/bin/python
- # -*- coding: utf8 -*-
- # 定义一个字符串
- s1 = 'this is long String that spans two lines'
- # 表示下面一行是上一行的延续
- s2 = 'this is long String\
- that spans two lines'
- #原样输出字符串
- s3 = """this is long String
- that spans two lines
- """
- # 换行输出字符串
- s4 = 'this is long String\n\
- that spans two lines'
- print "s1=",s1
- print "s2=",s2
- print "s3=",s3
- print "s4=",s4
输出结果:
1.2 python字符与字符值之间的转换
A :字符转化为数值&数值转化为字符串:其中ord函数可以把字符串转化为整数的范围为【0,65535】
- #!/usr/bin/python
- # -*- coding: utf8 -*-
- # 字符转化为数值
- s = 'a'
- print ord(s)
- # 数值转化为字符串
- b = 97
- print chr(b)
B:chr()函数的参数args在【0,256】,意思就是只能把【0,256】的数字转化为字符串
C:把一个Unicode码值转化为一个Unicode字符串
- #!/usr/bin/python
- # -*- coding: utf8 -*-
- #把unicode码值转化为字符串
- print repr(unichr(8224))
- #把unicode字符串转化为码值
- print repr(ord(u'\u2020'))
D:chr()函数与str函数的区别:
1. chr()函数是把一个小整数作为参数,并返回对应于ASCII单字符的字符串
2. str()函数是把任何整数作为参数,返回一个该整数的文本形式的字符串