python中，我们使用open来打开一个文件
1：open一次读取一数据行，通过迭代器来读取所有内容
2：readline()，是从打开的文件中读取一行
3：seek(),让我们从头开始读取文件
4：close(),关闭一个文件
一个完整openfile的例子，涉及是处理数据，转换为json，然后存储，然后读取出来
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#!/usr/bin/env python # coding=utf-8 import json names = [] scores = [] try: data = open('test.txt') for each_line in data: try: (name,score) = each_line.split(":") print "%s got : %s " % (name,score) names.append(name) scores.append(score) except ValueError: pass data.close() except IOError: print "The data file is missiing" try: names_txt = open('names_txt','w') scores_txt = open('scores_txt','w') names_txt.write(json.dumps(names)) scores_txt.write(json.dumps(scores)) names_txt.close() scores_txt.close() except IOError: print 'file error' try: data_new = open('names_txt') content = json.load(data_new) print 'the data from the txt: %s' % content print content[0] except: print 'error' pass |
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