1 #!/usr/bin/env python
2 # -*- coding: utf-8 -*-
3 #encode 编码 decode 解码
4 #GBK 编码： 全称是“《汉子内码扩展规范》” 双字节编码
5 s = "中文字符串"
6 bs = s.encode("utf-8")
7 cs = s.encode("GBK")
8 print("{} 的utf-8 编码是:{}".format(s,bs))
9 print("{} 的gbk 编码是:{}".format(s,cs))
10
11 #读操作：将一个文件读取到内存，并将内容输入到屏幕上
12 def main():
13 fname = input("输入文件名：")
14 infile = open(fname,"r")
15 data =infile.read()
16 print(data)
17
18 main()
19
20 #文件读取：read() readline() readlines()
21 #用readline()读取一个文件的前5行
22 def test():
23 fname = input("输入文件名：")
24 infile = open(fname, "r")
25 for i in range(5):
26 line = infile.readline()
27 print(line[:-1])
28 test()
29
30 #写入文件，从内存向文件写入文件 wirte(),writelines()
31 outfile = open("outfile.txt", "w")
32 outfile.writelines(["Hello", " ", "World"])
33 outfile.close()
34 infile = open("outfile.txt", "r")
35 print(infile.read())
36
37 '''
38 遍历文件模板
39 通用代码框架：
40 file = open(someFile, "r")
41 for line in file.readlines():
42 #处理一行文件内容
43 file.close()
44
45 简化代码框架：
46 file = open(someFile, "r")
47 for line in file:
48 #处理一行文件内容
49 file.close()
50 '''
51 #文件拷贝实例
52 def test2():
53 #用户输入文件名
54 f1 = input("输入一个源文件：").strip()
55 f2 = input("输入一个源文件：").strip()
56
57 #打开文件
58 infile = open(f1, "r")
59 outfile = open(f2, "w")
60
61 #拷贝数据
62 countLines = countChars = 0
63 for line in infile:
64 countLines += 1
65 countChars += len(line)
66 outfile.write(line)
67 print(countLines, "lines add", countChars, "char copied")
68
69 infile.close()
70 outfile.close()
71
72 test2()
