Windows下用Python你会几种copy文件的方法以及效率分析

001:os.system

import  os， tempfile

filename1 = tempfile.mktemp (".txt")

open (filename1,"w").close ()

filename2 = filename1 +".copy"

printfilename1,"=>", filename2     #拷文件

os.system ("copy %s %s"% (filename1, filename2))

ifos.path.isfile (filename2):print"Success"

dirname1 = tempfile.mktemp (".dir")

os.mkdir (dirname1)

dirname2 = dirname1 +".copy"

printdirname1,"=>", dirname2       #拷目录

os.system ("xcopy /s %s %s"% (dirname1, dirname2))

ifos.path.isdir (dirname2):print"Success"

2. shutil.copy和shutil.copytree

import  os, shutil, tempfile

filename1 = tempfile.mktemp (".txt")

open (filename1,"w").close ()

filename2 = filename1 +".copy"

printfilename1,"=>", filename2     #拷文件

shutil.copy (filename1, filename2)

ifos.path.isfile (filename2):print"Success"

dirname1 = tempfile.mktemp (".dir")

os.mkdir (dirname1)

dirname2 = dirname1 +".copy"

printdirname1,"=>", dirname2

#拷目录  复制文件夹及文件夹下面的所有文件 （比较重要）

shutil.copytree (dirname1, dirname2)

ifos.path.isdir (dirname2):print"Success"

3.  win32file.CopyFile

import  os, win32file, tempfile

filename1 = tempfile.mktemp (".txt")

open (filename1,"w").close ()

filename2 = filename1 +".copy"

printfilename1,"=>", filename2

#拷文件    文件已存在时，1为不覆盖，0为覆盖

win32file.CopyFile (filename1, filename2,1)

win32file.CopyFile (filename1, filename2,0)

win32file.CopyFile (filename1, filename2,1)

if os.path.isfile (filename2):print"Success"

dirname1 = tempfile.mktemp (".dir")

os.mkdir (dirname1)

dirname2 = dirname1 +".copy"

print dirname1,"=>", dirname2     #拷目录

win32file.CopyFile (dirname1, dirname2,1)

ifos.path.isdir (dirname2):print"Success"

4. SHFileOperation

import  os, tempfile

from win32com.shell  import  shell, shellcon

filename1 = tempfile.mktemp (".txt")

open (filename1,"w").close ()

filename2 = filename1 +".copy"

printfilename1,"=>", filename2

#拷文件   文件已存在时，shellcon.FOF_RENAMEONCOLLISION会指示重命名文件

shell.SHFileOperation ((0, shellcon.FO_COPY, filename1, filename2,0,None,None))

shell.SHFileOperation ((0, shellcon.FO_COPY, filename1, filename2, shellcon.FOF_RENAMEONCOLLISION,None,None))

shell.SHFileOperation ((0, shellcon.FO_COPY, filename1, filename2,0,None,None))

ifos.path.isfile (filename2):print"Success"

dirname1 = tempfile.mktemp (".dir")

os.mkdir (dirname1)

dirname2 = dirname1 +".copy"

printdirname1,"=>", dirname2      #拷目录

shell.SHFileOperation ((0, shellcon.FO_COPY, dirname1, dirname2,0,None,None))

ifos.path.isdir (dirname2):print"Success"

测试环境：系统——Win7 RTM，CPU——P4 3.0，MEM——1.5G DDR400，U盘——Kingston 4G

用4种不同的方法从硬盘拷贝MSDN 2008 SP1（2.37G）到U盘：

os System      的方法耗时903.218秒

shutil         的方法耗时1850.634秒

win32file      的方法耗时861.438秒

SHFileOperation的方法耗时794.023秒

文章转自：http://bbs.csdn.net/topics/320025687