What does % mean in python

There are two types of % in Python:

1. Numerical operations: % represents modulo and returns the remainder of division.

For example:

>>> 7%2 1

2. % operator (string formatting, string formatting), the description is as follows:

%[(name)][flags ][width].[precision]typecode

(name) can have, -, ' ' or 0 for named flags. Indicates right alignment. - means left alignment. ' ' is a space, which means padding a space to the left of the positive number to align it with the negative number. 0 means use 0 padding. width represents the display width precision represents the precision after the decimal point

Type code:

%s 字符串 (采用str()的显示) %r 字符串 (采用repr()的显示) %c 单个字符 %b 二进制整数 %d 十进制整数 %i 十进制整数 %o 八进制整数 %x 十六进制整数 %e 指数 (基底写为e) %E 指数 (基底写为E) %f 浮点数 %F 浮点数，与上相同 %g 指数(e)或浮点数 (根据显示长度) %G 指数(E)或浮点数 (根据显示长度) %% 字符"%"

Example:

>>> print("%6.3f" % 2.3) 2.300 # 第一个"%"后面的内容为显示的格式说明，6为显示宽度，3为小数点位数，f为浮点数类型 # 第二个"%"后面为显示的内容来源，输出结果右对齐，2.300长度为5，故前面有一空格

>>> print("%+10x" % 10) +a # x为表示16进制，显示宽度为10，前面有8个空

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