重新梳理Python基础（1）

1. 脚本中写中文出现乱码，用以下可以解决。参考http://www.python.org/dev/peps/pep-0263/

          # coding=<encoding name>

          #!/usr/bin/python
          # -*- coding: <encoding name> -*-

          #!/usr/bin/python
          # vim: set fileencoding=<encoding name> :

2. 输出格式，先看代码

my_name = 'Zed A. Shaw'

print "Let's talk about %s." % my_name
print "========================================================"
print round(2.00034, 3) #2.0
print round(345.2345, 2) #345.23
print "hex of 1444 is %x" % 1444   #5a4

round(num, n)函数是对浮点数num对第n位小数四舍五入，n取正负均可。

round(345, -1) = 350.0

round(345, -3) = 0.0

round(345, 0) = 345.0

以下是对Python format characters的总结，摘自http://docs.python.org/2/library/stdtypes.html#string-formatting-operations