开发笔记:Python——文件处理

1 def main():
2 fname=input("enter filename:")
3 infile=open(fname,‘r‘)
4 data=infile.read()
5 print(data)
6 main()

1 def main():
2 fname=input("enter filename:")
3 infile=open(fname,‘r‘)
4 for i in range(5):
5 line=infile.readline()
6 print(line)
7 def Read():
8 fname=input("enter filename:")
9 infile=open(fname,‘r‘)
10 for n in range(5):
11 line=infile.readline()
12 print(line[:-1])
13 main()
14 Read()

1 def main():
2 filename=input("enter the file‘s name:")
3 outfile=open(filename,‘w‘)
4 outfile.writelines([‘hello‘,‘\\n‘,‘world‘])
5 outfile.close()
6 infile=open(filename,‘r‘)
7 data=infile.read()
8 print(data)
9
10 main()

1 def main():
2
3 f1=input("enter a souce file:")
4 f2=input("enter a souce file:")
5
6 infile=open(f1,‘r‘)
7 outfile=open(f2,"w")
8
9 countlines=countchars=0
10 for line in infile:
11 countlines+=1
12 countchars+=len(line)
13 outfile.write(line)
14 print(countlines,‘lines and ‘,countchars,‘chars copied‘)
15
16 infile.close()
17 outfile.close()
18 main()
19
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