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python str.format()

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python中的字符串格式函数str.format():

技术分享
 1 #使用str.format()函数
 2 
 3 #使用‘{}‘占位符
 4 print(I\‘m {},{}.format(Hongten,Welcome to my space!))
 5 
 6 print(# * 40)
 7 
 8 #也可以使用‘{0}‘,‘{1}‘形式的占位符
 9 print({0},I\‘m {1},my E-mail is {2}.format(Hello,Hongten,hongtenzone@foxmail.com))
10 #可以改变占位符的位置
11 print({1},I\‘m {0},my E-mail is {2}.format(Hongten,Hello,hongtenzone@foxmail.com))
12 
13 print(# * 40)
14 
15 #使用‘{name}‘形式的占位符
16 print(Hi,{name},{message}.format(name = Tom,message = How old are you?))
17 
18 print(# * 40)
19 
20 #混合使用‘{0}‘,‘{name}‘形式
21 print({0},I\‘m {1},{message}.format(Hello,Hongten,message = This is a test message!))
22 
23 print(# * 40)
24 
25 #下面进行格式控制
26 import math
27 print(The value of PI is approximately {}..format(math.pi))
28 print(The value of PI is approximately {!r}..format(math.pi))
29 print(The value of PI is approximately {0:.3f}..format(math.pi))
30 
31 
32 table = {Sjoerd: 4127, Jack: 4098, Dcab: 7678}
33 for name, phone in table.items():
34     print({0:10} ==> {1:10d}.format(name, phone))
35 
36 
37 table = {Sjoerd: 4127, Jack: 4098, Dcab: 8637678}
38 print(Jack: {0[Jack]:d}; Sjoerd: {0[Sjoerd]:d}; ‘‘Dcab: {0[Dcab]:d}.format(table))
代码
技术分享
Python 3.3.2 (v3.3.2:d047928ae3f6, May 16 2013, 00:03:43) [MSC v.1600 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> ================================ RESTART ================================
>>> 
Im Hongten,Welcome to my space!
########################################
Hello,Im Hongten,my E-mail is hongtenzone@foxmail.com
Hello,Im Hongten,my E-mail is hongtenzone@foxmail.com
########################################
Hi,Tom,How old are you?
########################################
Hello,Im Hongten,This is a test message!
########################################
The value of PI is approximately 3.141592653589793.
The value of PI is approximately 3.141592653589793.
The value of PI is approximately 3.142.
Jack       ==>       4098
Sjoerd     ==>       4127
Dcab       ==>       7678
Jack: 4098; Sjoerd: 4127; Dcab: 8637678
>>>
运行结果

 

python str.format()

原文:http://www.cnblogs.com/qianyuliang/p/6406983.html

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