我正在使用以下命令执行文件的多个副本：
shutil.copy2(oldFile, newFile)
而不是返回新创建的文件的创建日期，而是保留较旧的文件。我正在检索日期：
dateCreated = os.path.getctime(newFile)
我认为这是由于函数为copy2，我认为这会传递元数据，所以我只用copy来尝试它无济于事。
但奇怪的是，Windows资源管理器中的“数据已修改”选项卡显示正确的日期和时间。
答案 0 :(得分：4)
在我刚试过的测试中，我看到以下行为：
test.txt -> Created: Tuesday, January 24, 2012 2:52 PM
-> Modified: Tuesday, January 24, 2012 2:52 PM
>>> from shutil import *
>>> copy('test.txt','test1.txt')
在我得到的目录中没有预先存在的test1.txt版本：
test1.txt -> Created: Today 8:54 AM
-> Modified: Today 8:54 AM
然后删除test1.txt并运行：
>>> copy2('test.txt','test1.txt')
在我得到的目录中没有预先存在的test1.txt版本：
test1.txt -> Created: Tuesday, January 24, 2012 2:52 PM
-> Modified: Tuesday, January 24, 2012 2:52 PM
>>> copy('test.txt','test1.txt')
因此，在我得到的目录中预先存在的test1.txt版本：
test1.txt -> Created: Tuesday, January 24, 2012 2:52 PM
-> Modified: Today 9:00 AM
>>> copy('test.txt','test1.txt')
因此，在我得到的目录中预先存在的test1.txt版本：
test1.txt -> Created: Tuesday, January 24, 2012 2:52 PM
-> Modified: Today 9:01 AM
这是您所看到的行为，您的引用：
我认为这是因为函数是copy2，它承载了我相信的元数据，所以我尝试了它只是复制无济于事。
要获得新的创建日期，您必须先使用copy或copyfile在创建新版本之前主动删除该文件。否则，date created将保留其原始创建时间。 copyfile 对copy的行为与date creation的行为相同。
答案 1 :(得分：1)
只需添加一条关于以下内容的说明：
要获得新的创建日期，您必须主动删除 在使用副本或创建新版本的文件之前使用 拷贝文件。否则，创建的日期将保留原始日期 创作时间。
如果有超过n个备份，我想编写一个脚本来备份某些文件和翻转文件。 手动删除现有文件时，例如通过来自其他CMD窗口的'del c：\ test.txt'然后运行脚本，然后运行进行备份的脚本，该文件获得新的ctime。否则，如果存在具有相同名称的文件并且您想要创建副本，则ctime将与已删除文件中的相同。
我写了一个例子： test.py：
import os
import shutil
import datetime
f_path = 'c:\\test.txt'
print f_path
print 'ctime = ' + str(datetime.datetime.utcfromtimestamp(os.path.getctime(f_path)))
print 'mtime = ' + str(datetime.datetime.utcfromtimestamp(os.path.getmtime(f_path)))
print ''
bkp_file = f_path + '.bkp'
print 'copying to ' + bkp_file
shutil.copyfile(f_path, bkp_file)
print 'ctime = ' + str(datetime.datetime.utcfromtimestamp(os.path.getctime(bkp_file)))
print 'mtime = ' + str(datetime.datetime.utcfromtimestamp(os.path.getmtime(bkp_file)))
print ''
print 'removing backup...'
os.remove(bkp_file)
print 'os.path.exists(bkp_file) = ' + str(os.path.exists(bkp_file))
print ''
print 'copying to ' + bkp_file
shutil.copyfile(f_path, bkp_file)
print 'ctime = ' + str(datetime.datetime.utcfromtimestamp(os.path.getctime(bkp_file)))
print 'mtime = ' + str(datetime.datetime.utcfromtimestamp(os.path.getmtime(bkp_file)))
print ''
print 'removing backup again...'
os.remove(bkp_file)
print 'os.path.exists(bkp_file) = ' + str(os.path.exists(bkp_file))
import tempfile
tmp = tempfile.mktemp(dir='c:\\')
print ''
print 'Created temp file name - ' + tmp
print 'Copying to temp file name...'
shutil.copyfile(f_path, tmp)
print 'ctime = ' + str(datetime.datetime.utcfromtimestamp(os.path.getctime(tmp)))
print 'mtime = ' + str(datetime.datetime.utcfromtimestamp(os.path.getmtime(tmp)))
print ''
print 'renaming file to the same name as the one already deleted'
shutil.move(tmp, bkp_file)
print 'ctime = ' + str(datetime.datetime.utcfromtimestamp(os.path.getctime(bkp_file)))
print 'mtime = ' + str(datetime.datetime.utcfromtimestamp(os.path.getmtime(bkp_file)))
c:\test.py
c:\test.txt
ctime = 2014-04-30 14:43:41.649976
mtime = 2014-05-05 11:19:19.344976
copying to c:\test.txt.bkp
ctime = 2014-05-05 12:19:38.281976
mtime = 2014-05-05 12:19:38.282976
removing backup... os.path.exists(bkp_file) = False
copying to c:\test.txt.bkp
ctime = 2014-05-05 12:19:38.281976
mtime = 2014-05-05 12:19:38.284976
removing backup again... os.path.exists(bkp_file) = False
Created temp file name - c:\tmpn5ofid Copying to temp file name...
ctime = 2014-05-05 12:19:38.311976
mtime = 2014-05-05 12:19:38.312976
renaming file to the same name as the one already deleted
ctime = 2014-05-05 12:19:38.281976
mtime = 2014-05-05 12:19:38.312976
C:\>
C:\>test.py
c:\test.txt
ctime = 2014-04-30 14:43:41.649976
mtime = 2014-05-05 11:19:19.344976
copying to c:\test.txt.bkp
ctime = 2014-05-05 12:19:38.281976 # ctime of old file
mtime = 2014-05-05 12:21:58.179976
removing backup... os.path.exists(bkp_file) = False
copying to c:\test.txt.bkp
ctime = 2014-05-05 12:19:38.281976 # ctime of old file that does not exist
mtime = 2014-05-05 12:21:58.190976
removing backup again... os.path.exists(bkp_file) = False
Created temp file name - c:\tmpzi2lp2 Copying to temp file name...
ctime = 2014-05-05 12:21:58.222976
mtime = 2014-05-05 12:21:58.222976
renaming file to the same name as the one already deleted
ctime = 2014-05-05 12:19:38.281976 # after renaming existing file it gets old ctime
mtime = 2014-05-05 12:21:58.222976
C:\>
答案 2 :(得分：0)