1.反斜杠以及转义字符的用法 多上网查资料
2.输入
PRint "how old are you?"age = raw_input()age = raw_input("how old are you?")
结果:
how old are you?
_ (输入)
how old are you?_ (输入)
print "how old are you?"raw_input(">>")
结果:
how old are you?
>>_
3.参数,解包,变量
from sys import argva,b,c = argvprint a,b,c
结果(文件名为a.py 后面参数为 1,2)
a.py 1 2
注意参数变量个数要和解包数量想对应
4.文件处理
from sys import argvfile1,file2 = argvprint "opening the file "a = open (file2,"w")print "truncating the file "a.truncate()print "two lines:"a.write("abcdef")a.write("/n")a.write('ghijk')a.write(/n)
结果:
opening the file
truncating the file
two lines:
abcdef
ghijk
还有更多的文件操作 各种命令
多看资料
5.函数
def print_two(*args): arg1,arg2 = args print "arg1: %r,arg2: %r")%(arg1,arg2)def print_one(arg1): print "arg1: %r"%arg1print_two("fan","year")print_one("cool")
结果:
'fan''year'
'cool'
def add(a,b): return a-bprint add(6,2)
结果:
4
注意函数有严格的缩进要求
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