Python学习记录

输入参数：

首先引入sys， 然后通过sys.argv[]来访问

示例代码：

import sys
print "argument number is "+str(len(sys.argv))
for i in range(0,len(sys.argv),1):
        print "argument "+str(i)+" : "+sys.argv[i]

文件读写：

这个不多说，直接上示例代码，一目了然，代码目的将A文件按行加上行号复制到文件B中

inf = open("in.txt","rb")
outf = open("out.txt","w")
count = 0
for line in inf.readlines():
        newline = str(count)+":"+line
        outf.write(newline)
        count +=1
inf.close()
outf.close()

遍历文件：

遍历文件夹下的文件

import os
indir ="./get_sample_match_road"
for parent,dirnames,filenames in os.walk(indir):
        print "parent dir:"
        print "\t"+parent

        print "directory name:"
        for dirname in dirnames:
                print "\t"+dirname

        print "file name:"
        for filename in filenames:
                print "\t"+filename

        print "*************************"

字典的使用：

#define
dict = {}
#insert
dict["sogou"] = 1
dict["baidu"] = 2
dict["gaode"] = 3

#judge if has a key:
print dict.has_key("baidu")
print dict.has_key("tengxun")

#get a val by key:
print dict["baidu"]

#travel the dict:
for k in dict:
        print "dict[%s]=%s" % (k,dict[k])