本文实例讲述了Python实现按特定格式对文件进行读写的方法。分享给大家供大家参考,具体
本文实例讲述了Python实现按特定格式对文件进行读写的方法。分享给大家供大家参考,具体如下:
#! /usr/bin/env python
#coding=utf-8
class ResultFile(object):
def __init__(self, res):
self.res = res
def WriteFile(self):
fp = open('pre_result.txt', 'w')
print 'write start!'
try:
for item in self.res:
fp.write(item['host'])
fp.write('\r')
fp.write(str(item['cpu']))#write方法的实参需要为string类型
fp.write('\r')
fp.write(str(item['mem']))
fp.write('\n')
finally:
fp.close()
print 'write finish!'
def ReadFile(self):
res = []
fp = open('pre_result.txt', 'r')
try:
lines = fp.readlines()#读取出全部数据,按行存储
finally:
fp.close()
for line in lines:
dict = {}
#print line.split() #like['compute21', '2', '4']
line_list = line.split() #默认以空格为分隔符对字符串进行切片
dict['host'] = line_list[0]
dict['cpu'] = int(line_list[1])#读取出来的是字符
dict['mem'] = int(line_list[2])
res.append(dict)
return res
if __name__ == '__main__':
result_list=[{'host':'compute21', 'cpu':2, 'mem':4},{'host':'compute21', 'cpu':2, 'mem':4},
{'host':'compute22', 'cpu':2, 'mem':4},{'host':'compute23', 'cpu':2, 'mem':4},
{'host':'compute22', 'cpu':2, 'mem':4},{'host':'compute23', 'cpu':2, 'mem':4},
{'host':'compute24', 'cpu':2, 'mem':4}]
file_handle = ResultFile(result_list)
#1、写入数据
#print 'write start!'
file_handle.WriteFile()
#print 'write finish!'
#2、读取数据
res = file_handle.ReadFile()
print res
写入的文件:
每一行的数据之间其实已经加入空格。
运行结果:
write start!
write finish!
[{'mem': 4, 'host': 'compute21', 'cpu': 2}, {'mem': 4, 'host':
'compute21', 'cpu': 2}, {'mem': 4, 'host': 'compute22', 'cpu': 2},
{'mem': 4, 'host': 'compute23', 'cpu': 2}, {'mem': 4, 'host':
'compute22', 'cpu': 2}, {'mem': 4, 'host': 'compute23', 'cpu': 2},
{'mem': 4, 'host': 'compute24', 'cpu': 2}]
实现了按原有格式写入和读取。
Python 特定格式 文件 读写