Python学习笔记——文件

import os
for tempdir in (‘/tmp‘,r‘c:\temp‘):
    if os.path.isdir(tempdir):
        break
else:
    print (‘no temp directory available‘)
    tempdir=‘‘
if tempdir:
    os.chdir(tempdir)
    cwd=os.getcwd()
    print (‘****current temporary directory:‘)
    print (cwd)

    print(‘****creating example directory:‘)
    os.mkdir(‘example‘)
    os.chdir(‘example‘)
    cwd=os.getcwd()
    print (‘****new working directory:‘)
    print (cwd)
    print("****original directory listing:")
    print(os.listdir(cwd))
    print (‘****creating test file...‘)
    f=open(‘test‘,‘w‘)
    f.write(‘foo\n‘)
    f.write(‘bar\n‘)
    f.close()
    print(‘****updated directory listing:‘)
    print(os.listdir(cwd))

    print("****renaming ‘test‘to‘filetest.txt‘")
    os.rename(‘test‘,‘filetest. txt‘)
    print (‘****updated directory 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:‘)
    f=open(path)
    for eachLine in f:
        print(eachLine)
    f.close()

    print ("****deleting test file")
    os.remove(path)
    print (‘****updated directory listing:‘)
    print (os.listdir(cwd))
    os.chdir(os.pardir)
    print (‘****deleting test directory‘)
    os.rmdir(‘example‘)
    print(‘****Done‘)