python 文件

输入

1.

fname='in.txt'

fr=file(fname,'r')

while k>0:

    line=fr.readline()

    if len(line)==0:

        break
fr.close()

2.

url="in.txt"

f = open(url,"rb").read()  #这个不用关闭

words = wtl32(f)

 3.

    fr=open('my_test.out','r')

    line=fr.readline()

    fr.close()

 

4. 输入并按单词分句

def readfile(fname='in.txt'):

    fr=file(fname,'r')

    lines=[]

    while True:

        line=fr.readline()

        if len(line)==0:

            break

        one_line=re.findall(r'[0-9]+',line)

        lines.append(one_line)

    fr.close()

    return lines #//返回以单词为单位的二维数组

 5.

file_path = 'xx.dat'

with open(file_path, 'rb') as f:

    for line in f:

        line=line.decode()

        words=line.split('::')

 

输出

1.

out_f = open("out.txt","wb")

for j in y:

        print >>out_f,j[0],j[1]# 输出到文件out_f
out_f.close()

 ============================

获取当前路径下的所有文件

import os

filenames=os.listdir(os.getcwd())

for name in filenames:

    print name