Python 中的几种copy用法

wyd1990

看到这个好帖，觉得好就移过来了，学习学习。。。


1. os.system

Python code

import os
import tempfile

filename1 = tempfile.mktemp (".txt") #产生临时文件或目录，tempfile.mktemp(suffix='',prefix='tmp'，dir=None)
                                      产生的文件名或目录，默认就是函数里的参数。  
open (filename1, "w").close ()
filename2 = filename1 + ".copy"
print filename1, "=>", filename2
#拷文件
os.system ("copy %s %s" % (filename1, filename2))
if os.path.isfile (filename2): print "Success"

dirname1 = tempfile.mktemp (".dir")
os.mkdir (dirname1)
dirname2 = dirname1 + ".copy"
print dirname1, "=>", dirname2

#拷目录
os.system ("xcopy /s %s %s" % (dirname1, dirname2)) #DOS下，拷贝目录命令xcopy
if os.path.isdir (dirname2): print "Success"

2. shutil.copy和shutil.copytree
Python code

import os
import shutil
import tempfile

filename1 = tempfile.mktemp (".txt")
open (filename1, "w").close ()
filename2 = filename1 + ".copy"
print filename1, "=>", filename2

#拷文件
shutil.copy (filename1, filename2)

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

dirname1 = tempfile.mktemp (".dir")
os.mkdir (dirname1)
dirname2 = dirname1 + ".copy"
print dirname1, "=>", dirname2

#拷目录
shutil.copytree (dirname1, dirname2)
if os.path.isdir (dirname2): print "Success"




3. win32file.CopyFile


Python code

import os
import win32file
import tempfile

filename1 = tempfile.mktemp (".txt")
open (filename1, "w").close ()
filename2 = filename1 + ".copy"
print filename1, "=>", 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)
if os.path.isdir (dirname2): print "Success"

4. SHFileOperation
Python code

import os
from win32com.shell import shell, shellcon
import tempfile

filename1 = tempfile.mktemp (".txt")
open (filename1, "w").close ()
filename2 = filename1 + ".copy"
print filename1, "=>", 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)
)

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

dirname1 = tempfile.mktemp (".dir")
os.mkdir (dirname1)
dirname2 = dirname1 + ".copy"
print dirname1, "=>", dirname2

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

if os.path.isdir (dirname2): print "Success"
测试结果出来了：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秒另外SHFileOperation是显示对话框的，可以这样用Python code shell.SHFileOperation ( (0, shellcon.FO_COPY, filename1, filename2, shellcon.FOF_RENAMEONCOLLISION | \ shellcon.FOF_NOCONFIRMATION |\ shellcon.FOF_NOERRORUI | \ shellcon.FOF_SILENT, None, None))