Windows下用Python你會幾種copy檔案的方法以及效率分析
阿新 • • 發佈:2019-02-05
001:os.system
import os import tempfile filename1 = tempfile.mktemp (".txt") open (filename1, "w").close () filename2 = filename1 + ".copy" print filename1, "=>", filename2 #拷檔案 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 #拷目錄 os.system ("xcopy /s %s %s" % (dirname1, dirname2)) if os.path.isdir (dirname2): print "Success"
2. shutil.copy和shutil.copytree
import os import shutil import tempfile filename1 = tempfile.mktemp (".txt") open (filename1, "w").close () filename2 = filename1 + ".copy" print filename1, "=>", filename2 #拷檔案 shutil.copy (filename1, filename2) if os.path.isfile (filename2): print "Success" dirname1 = tempfile.mktemp (".dir") os.mkdir (dirname1) dirname2 = dirname1 + ".copy" print dirname1, "=>", dirname2 #拷目錄 shutil.copytree (dirname1, dirname2) if os.path.isdir (dirname2): print "Success"
3. win32file.CopyFile
import os import win32file import tempfile filename1 = tempfile.mktemp (".txt") open (filename1, "w").close () filename2 = filename1 + ".copy" print filename1, "=>", filename2 #拷檔案 #檔案已存在時,1為不覆蓋,0為覆蓋 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 #拷目錄 win32file.CopyFile (dirname1, dirname2, 1) if os.path.isdir (dirname2): print "Success"
4. SHFileOperation
import os
from win32com.shell import shell, shellcon
import tempfile
filename1 = tempfile.mktemp (".txt")
open (filename1, "w").close ()
filename2 = filename1 + ".copy"
print filename1, "=>", filename2
#拷檔案
#檔案已存在時,shellcon.FOF_RENAMEONCOLLISION會指示重新命名檔案
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
#拷目錄
shell.SHFileOperation (
(0, shellcon.FO_COPY, dirname1, dirname2, 0, None, None)
)
if os.path.isdir (dirname2): print "Success"
測試環境:系統——Win7 RTM,CPU——P4 3.0,MEM——1.5G DDR400,U盤——Kingston 4G
用4種不同的方法從硬碟拷貝MSDN 2008 SP1(2.37G)到U盤:
os System 的方法耗時903.218秒
shutil 的方法耗時1850.634秒
win32file 的方法耗時861.438秒
SHFileOperation的方法耗時794.023秒