python简明手册学习

Posted 2020-08-16

1、行末单独一个反斜杠表示字符串在下一行继续，而不是开始一个新的行。

>>> "This is the first sentence.... This is the second sentence."
‘This is the first sentence.This is the second sentence.‘

 

2、自然字符串，如何需要某些字符串不需要转义，可以添加前缀r或R。

>>> a = r"Newlines are indicated by \n"
>>> print a
Newlines are indicated by \n

 

3、转换为Unicode字符串

>>> line = u"This is a Unicode string"
>>> print line
This is a Unicode string

 

4、python把程序中用到的任何东西都称为对象，使用变量和字面意义上的常量

#!/usr/bin/env python
i = 5
print i
i = i + 1
print i

s = ‘‘‘This is a multi-line string.
This is the second line.‘‘‘
print s

# python var.py
5
6
This is a multi-line string.
This is the second line.