查看shutil
包装,尤其是rmtree
和copytree
。您可以使用来检查文件/路径是否存在os.paths.exists(<path>)
。
import shutil
import os
def copy_and_overwrite(from_path, to_path):
if os.path.exists(to_path):
shutil.rmtree(to_path)
shutil.copytree(from_path, to_path)
copytree
如果Dirs已经存在,Vincent就不工作是正确的。distutils
更好的版本也是如此。以下是的固定版本shutil.copytree
。它基本上是1-1复制的,除了第一个os.makedirs()
放在if-else-construct之后:
import os
from shutil import *
def copytree(src, dst, symlinks=False, ignore=None):
names = os.listdir(src)
if ignore is not None:
ignored_names = ignore(src, names)
else:
ignored_names = set()
if not os.path.isdir(dst):
os.makedirs(dst)
errors = []
for name in names:
if name in ignored_names:
continue
srcname = os.path.join(src, name)
dstname = os.path.join(dst, name)
try:
if symlinks and os.path.islink(srcname):
linkto = os.readlink(srcname)
os.symlink(linkto, dstname)
elif os.path.isdir(srcname):
copytree(srcname, dstname, symlinks, ignore)
else:
copy2(srcname, dstname)
except Error, err:
errors.extend(err.args[0])
except EnvironmentError, why:
errors.append((srcname, dstname, str(why)))
try:
copystat(src, dst)
except OSError, why:
if WindowsError is not None and isinstance(why, WindowsError):
pass
else:
errors.extend((src, dst, str(why)))
if errors:
raise Error, errors
os.system("cp -rf /src/dir /dest/dir")
会很容易...