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Python:讀文件和寫文件
1. 寫文件
[python]
- #! /usr/bin/python3
-
- 'makeTextFile.py -- create text file'
-
- import os
-
- def write_file():
- "used to write a text file."
-
- ls = os.linesep
- #get filename
- fname = input("Please input filename:")
-
- while True:
-
- if os.path.exists(fname):
- print("Error: '%s' already exists" % fname)
- fname = input("Please input filename:")
- else:
- break
-
- #get file conent linesOnScreen
- all = []
- print("\nEnter lines ('.' to quit).\n")
-
- while True:
- entry = input('>')
- if entry == '.':
- break
- else:
- all.append(entry)
-
- try:
- fobj = open(fname, 'w')
- except IOError as err:
- print('file open error: {0}'.format(err))
-
- fobj.writelines(['%s%s' % (x, ls) for x in all])
- fobj.close()
-
- print('WRITE FILE DONE!')
-
- return fname
2. 讀文件
[python]
- #! /usr/bin/python3
-
- 'readTextFile.py -- read and display text file.'
-
- def read_file(filename):
- 'used to read a text file.'
-
- try:
- fobj = open(filename, 'r')
- except IOError as err:
- print('file open error: {0}'.format(err))
- else:
- for eachLine in fobj:
- print(eachLine)
- fobj.close()
-
-
-
3. 主程序
[python]
- #! /usr/bin/python3
-
- 'write_and_read_file.py -- write and read text file.'
-
- import makeTextFile
- import readTextFile
-
- if __name__ == '__main__':
-
- #wrie file
- filename = makeTextFile.write_file()
-
- #read file
- readTextFile.read_file(filename)
4.運行結果
[html]
- Python 3.2.2 (default, Sep 4 2011, 09:51:08) [MSC v.1500 32 bit (Intel)] on winxp-duanyx, Standard
- >>> Please input filename:d:\testpython.log
-
- Enter lines ('.' to quit).
-
- >this is a test file.
- >ok ,let us input . to end the content input.
- >.
- WRITE FILE DONE!
- this is a test file.
-
-
-
- ok ,let us input . to end the content input.
-
-
-
-
- >>>
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