这是一个英语阅读生词总结（雾）

Some prompts :

• (>>>) (three greater-than signs) primary prompt
• (…) secondary prompt

Operators :

• (//) to do floor division and get a integer result (discarding any flactional result)
• (**) to calculate power
• (_) if you use Python as a calculator you can type _ to get the last printed expression (ps. Don not assign the value to it)
• use round(a, b) to keep a in the b decimal place
• (j or J) use the J suffix to indicate the imaginary part

String operators :
quotes : 单引号
double quotes : 双引号
backslashes : 反斜线
(\) use \’ to escape the single quote
(\n) \n means newline

String operation :
If you don’t want character prefaced by \ to be interpreted as special characters, you can use raw string by adding an r before the first quote.

>>> print('C:\some\name')
C:\some
ame
>>> print(r'C:\some\name')
C:\some\name

using triple-quotes : ''' or """ so that the strings literals can span multiple lines. and use \at the end of the line to avoid that end of lines are automatically included in the string.
The following example:

print("""\
Usage: thingy [OPTIONS]
     -h                        Display this usage message
     -H hostname               Hostname to connect to
""")

Usage: thingy [OPTIONS]
     -h                        Display this usage message
     -H hostname               Hostname to connect to

Strings can be concatenated (glued together) with the + operator and repeated with *.
Two or more string literals next to each other are automatically concatenated.

>>> text = ('Put several strings within parentheses '
...         'to have them joined together.')
>>> text
'Put several strings within parentheses to have them joined together.'

This feature is only work with two literals, not with variables or expressions.