核心程式設計中的檔案操作的例子：
'''
created on 2012-3-7
@author: administrator
'''#!/usr/bin/env python
import os
for tmpdir in('c:\\','r'):
if os.path.isdir(tmpdir):
print tmpdir
break
else:
print 'no temp'
tmpdir=''
if tmpdir:
os.chdir(tmpdir)
cwd = os.getcwd()
print '**** current temp dir'
print cwd
print '*** creating example dir...'
os.mkdir('example')
os.chdir('example')
cwd = os.getcwd()
print '*** new working dir'
print cwd
print '*** original dir listing:'
print os.listdir(cwd)
print "*** creating test file..."
fobj = open('test','w')
fobj.write('foo\n')
fobj.write('bar\n')
fobj.close()
print '*** updated dir listing:'
print os.listdir(cwd)
print "*** renaming 'test' to 'filetest.txt'"
os.rename('test', 'filetest.txt')
print '*** updated dir listing:'
print os.listdir(cwd)
path = os.path.join(cwd,os.listdir(cwd)[0])
print '***full file pathname'
print path
print '***(pathname,basename)=='
print os.path.split(path)
print '***(filename,extension)=='
print os.path.splitext(os.path.basename(path))
print '*** displaying file contents:'
fobj=open(path)
for eachline in fobj:
print eachline
fobj.close()
print '*** deleting test file'
os.remove(path)
print '*** updated dir listing:'
print os.listdir(cwd)
os.chdir(os.pardir)
print '*** deleting test dir'
os.rmdir('example')
print '*** done'
執行結果，比較簡單pydev debugger: starting
c:\**** current temp dir
c:\*** creating example dir...
*** new working dir
c:\example
*** original dir listing:
*** creating test file...
*** updated dir listing:
['test']
*** renaming 'test' to 'filetest.txt'
*** updated dir listing:
['filetest.txt']
***full file pathname
c:\example\filetest.txt
***(pathname,basename)==
('c:\\example', 'filetest.txt')
***(filename,extension)==
('filetest', '.txt')
*** displaying file contents:
foobar
*** deleting test file
*** updated dir listing:
*** deleting test dir
*** done
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