Python3 字符串格式化
2021-04-24 22:30
标签:pad syn dex ace cells server 字符串格式化 table highlight 字符串的格式化方法分为两种,分别为占位符(%)和format方式。占位符方式在Python2.x中用的比较广泛,随着Python3.x的使用越来越广,format方式使用的更加广泛。 Python3 字符串格式化 标签:pad syn dex ace cells server 字符串格式化 table highlight 原文地址:https://www.cnblogs.com/lmp5023/p/13261784.html一 占位符(%)
%d
实例(Python3.0+):
age
=
29
print
(
"my age is %d"
%
age)
#my age is 29
%s
实例(Python3.0+):
name
=
"makes"
print
(
"my name is %s"
%
name)
#my name is makes
%f
实例(Python3.0+):
print
(
"%6.3f"
%
2.3
)
#2.300
print
(
"%f"
%
2.3
)
#2.300000
二 format方法
位置映射
实例(Python3.0+):
print
(
"{}:{}"
.
format
(
‘192.168.0.100‘
,
8888
))
#192.168.0.100:8888
关键字映射
实例(Python3.0+):
print
(
"{server}{1}:{0}"
.
format
(
8888
,
‘192.168.1.100‘
,server
=
‘Web Server Info :‘
))
#Web Server Info :192.168.1.100:8888
元素访问
实例(Python3.0+):
print
(
"{0[0]}.{0[1]}"
.
format
((
‘baidu‘
,
‘com‘
)))
#baidu.com
填充对齐
实例1(Python3.0+):
print
(
"{0}*{1}={2:0>2}"
.
format
(
3
,
2
,
2
*
3
))
#3*2=06
print
(
"{:*^30}"
.
format
(
‘centered‘
))
#***********centered***********
实例2(Python3.0+):九九乘法表
for
i
in
range
(
1
,
10
):
a
=
1
while
a
=
i:
print
(
"{0}*{1}={2:0>2}"
.
format
(a,i,a
*
i),end
=
"\t"
)
a
+
=
1
print
()
"""
1*1=01
1*2=02 2*2=04
1*3=03 2*3=06 3*3=09
1*4=04 2*4=08 3*4=12 4*4=16
1*5=05 2*5=10 3*5=15 4*5=20 5*5=25
1*6=06 2*6=12 3*6=18 4*6=24 5*6=30 6*6=36
1*7=07 2*7=14 3*7=21 4*7=28 5*7=35 6*7=42 7*7=49
1*8=08 2*8=16 3*8=24 4*8=32 5*8=40 6*8=48 7*8=56 8*8=64
1*9=09 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81
"""
精度设置
实例(Python3.0+):
print
(
"{:.3f}"
.
format
(
2.1415
))
#2.142
print
(
"{:.10f}"
.
format
(
3.1415
))
#3.1415000000