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shutil.copyfileobj()文件拷贝,只拷贝文件内容：
# 文件文件拷贝
f1 = open("srcfile",‘r‘)
f2 = open("dstfile",‘w‘)
shutil.copyfileobj(f1,f2)
# 二进制文件拷贝
f1 = open("srcfile_b.mp4",‘rb‘)
f2 = open("dstfile_b.mp4",‘wb‘)
shutil.copyfileobj(f1,f2)
# copyfileobj源码：
def copyfileobj(fsrc, fdst, length=16*1024):
"""copy data from file-like object fsrc to file-like object fdst"""
while 1:
buf = fsrc.read(length)
if not buf:
break
fdst.write(buf)
shutil.copyfile(src,dst)拷贝文件，参数是文件路径。目标文件是已"wb"打开，也就是不管目标存不存在，都会生成新的目标文件，不能复制目录
shutil.copyfile("srcfile","dstfile")
# copyfile源代码
def copyfile(src, dst, *, follow_symlinks=True):
"""Copy data from src to dst.
If follow_symlinks is not set and src is a symbolic link, a new
symlink will be created instead of copying the file it points to.
"""
if _samefile(src, dst):
raise SameFileError("{!r} and {!r} are the same file".format(src, dst))
for fn in [src, dst]:
try:
st = os.stat(fn)
except OSError:
# File most likely does not exist
pass
else:
# XXX What about other special files? (sockets, devices...)
if stat.S_ISFIFO(st.st_mode):
raise SpecialFileError("`%s` is a named pipe" % fn)
if not follow_symlinks and os.path.islink(src):
os.symlink(os.readlink(src), dst)
else:
with open(src, ‘rb‘) as fsrc:
with open(dst, ‘wb‘) as fdst:
copyfileobj(fsrc, fdst)
return dst
copymode(src, dst, *, follow_symlinks=True)，拷贝文件权限
"""Copy mode bits from src to dst.
If follow_symlinks is not set, symlinks aren‘t followed if and only
if both `src` and `dst` are symlinks. If `lchmod` isn‘t available
(e.g. Linux) this method does nothing.
def copystat(src, dst, *, follow_symlinks=True):拷贝文件权限、访问时间和标识
def copystat(src, dst, *, follow_symlinks=True):
"""Copy all stat info (mode bits, atime, mtime, flags) from src to dst.
If the optional flag `follow_symlinks` is not set, symlinks aren‘t followed if and
only if both `src` and `dst` are symlinks.
"""
def copy(src, dst, *, follow_symlinks=True): 拷贝文件和文件权限，不能复制目录
def copy(src, dst, *, follow_symlinks=True):
"""Copy data and mode bits ("cp src dst"). Return the file‘s destination.
The destination may be a directory.
If follow_symlinks is false, symlinks won‘t be followed. This
resembles GNU‘s "cp -P src dst".
If source and destination are the same file, a SameFileError will be
raised.
"""
if os.path.isdir(dst):
dst = os.path.join(dst, os.path.basename(src))
copyfile(src, dst, follow_symlinks=follow_symlinks)
copymode(src, dst, follow_symlinks=follow_symlinks)
return dst
def copy2(src, dst, *, follow_symlinks=True):拷贝文件、权限、访问时间，不能复制目录
def copy2(src, dst, *, follow_symlinks=True):
"""Copy data and all stat info ("cp -p src dst"). Return the file‘s
destination."
The destination may be a directory.
If follow_symlinks is false, symlinks won‘t be followed. This
resembles GNU‘s "cp -P src dst".
"""
if os.path.isdir(dst):
dst = os.path.join(dst, os.path.basename(src))
copyfile(src, dst, follow_symlinks=follow_symlinks)
copystat(src, dst, follow_symlinks=follow_symlinks)
return dst
shutil.copytree("srcdir","dstdir")复制目录，并把目录下的子目录或文件递归复制到目标目录。
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原文地址：http://www.cnblogs.com/owasp/p/5500045.html
