python f-string 备忘表

Python f-string 备忘单

ref https://fstring.help/cheat/

ref https://cheatography.com/brianallan/cheat-sheets/python-f-strings-basics/
ref https://cheatography.com/brianallan/cheat-sheets/python-f-strings-number-formatting/

数字

num	format
%d	整数
%e	科学计数
%f	浮点
%	百分数
%b	二进制
%o	八进制
%x	十六进制
%c	Unicode

integer = 123
number_ = 9876.6789
percent = 0.98765

var	num	format	f-string	output
integer	123	d	f’{integer:d}’	123
integer	123	b	f’{integer:b}’	1111011
integer	123	8b	f’{integer:8b}’	1111011
integer	123	_b	f’{integer:_b}’	111_1011
integer	123	09_b	f’{integer:09_b}’	0111_1011
integer	123	o	f’{integer:o}’	173
integer	123	#o	f’{integer:#o}’	0o173
integer	123	x	f’{integer:x}’	7b
integer	123	#x	f’{integer:#x}’	0x7b
integer	123	08x	f’{integer:08x}’	0000007b
integer	123	c	f’{integer:c}’	{
number_	9876.6789	f	f’{number_:f}’	9876.678900
number_	9876.6789	.2f	f’{number_:.2f}’	9876.68
number_	9876.6789	09.2f	f’{number_:09.2f}’	009876.68
number_	9876.6789	09.5f	f’{number_:09.5f}’	9876.67890
number_	9876.6789	.2f	f’{number_:.2f}’	9876.68
percent	0.98765	%	f’{percent:%}’	98.765000%
percent	0.98765	9.5%	f’{percent:9.5%}’	98.76500%
percent	0.98765	09.4%	f’{percent:09.4%}’	098.7650%
percent	0.98765	09.5%	f’{percent:09.5%}’	98.76500%
number_	9876.6789	.2e	f’{number_:.2e}’	9.88e+03
number_	9876.6789	09.2e	f’{number_:09.2e}’	09.88e+03

string = “Python”

var	num	format	f-string	output
string	Python	20	f’{string:20}’	Python
string	Python	>20	f’{string:>20}’	Python
string	Python	<20	f’{string:<20}’	Python
string	Python	^20	f’{string:^20}’	Python
string	Python	>>20	f’{string:>>20}’	>>>>>>>>>>>>>>Python
string	Python	<<20	f’{string:<<20}’	Python<<<<<<<<<<<<<<
string	Python	^^20	f’{string:^^20}’	^^^^^^^Python^^^^^^^
string	Python	=^20	f’{string:=^20}’	=======Python=======