我正在尝试将 rsync 与 subprocess.call 一起使用。奇怪的是，如果我传递 subprocess.call 一个字符串，它就可以工作，但它不适用于列表（ala，Python's doc）。
使用字符串调用 sp.call：
In [23]: sp.call("rsync -av content/ writings_raw/", shell=True)
sending incremental file list
sent 6236 bytes received 22 bytes 12516.00 bytes/sec
total size is 324710 speedup is 51.89
Out[23]: 0
使用列表调用 sp.call：
In [24]: sp.call(["rsync", "-av", "content/", "writings_raw/"], shell=True)
rsync version 3.0.9 protocol version 30
Copyright (C) 1996-2011 by Andrew Tridgell, Wayne Davison, and others.
Web site: http://rsync.samba.org/
Capabilities:
64-bit files, 64-bit inums, 32-bit timestamps, 64-bit long ints,
socketpairs, hardlinks, symlinks, IPv6, batchfiles, inplace,
append, ACLs, xattrs, iconv, symtimes
rsync comes with ABSOLUTELY NO WARRANTY. This is free software, and you
are welcome to redistribute it under certain conditions. See the GNU
General Public Licence for details.
rsync is a file transfer program capable of efficient remote update
via a fast differencing algorithm.
Usage: rsync [OPTION]... SRC [SRC]... DEST
or rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST
or rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST
or rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST
or rsync [OPTION]... [USER@]HOST:SRC [DEST]
or rsync [OPTION]... [USER@]HOST::SRC [DEST]
or rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]
The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect
to an rsync daemon, and require SRC or DEST to start with a module name.
Options
-v, --verbose increase verbosity
-q, --quiet suppress non-error messages
--no-motd suppress daemon-mode MOTD (see manpage caveat)
... snipped....
repeated: --filter='- .rsync-filter'
--exclude=PATTERN exclude files matching PATTERN
--blocking-io use blocking I/O for the remote shell
-4, --ipv4 prefer IPv4
-6, --ipv6 prefer IPv6
--version print version number
(-h) --help show this help (-h is --help only if used alone)
...snipped ...
rsync error: syntax or usage error (code 1) at main.c(1438) [client=3.0.9]
Out[24]: 1
我如何使用列表有什么问题？你会如何解决它？我需要这个列表，因为我想使用变量。当然我可以使用：
sp.call("rsync -av "+Orig+" "+Dest, shell=True)
但我想了解如何subprocess理解列表与字符串。
设置 shell=False 和一个列表：
In [36]: sp.call(['rsync', '-av', ORIG, DEST], shell=False)
sending incremental file list
sent 6253 bytes received 23 bytes 12552.00 bytes/sec
total size is 324710 speedup is 51.74
Out[36]: 0
设置 shell=False 和一个字符串
In [38]: sp.call("rsync -av"+" "+ORIG+" "+DEST, shell=False)
---------------------------------------------------------------------------
OSError Traceback (most recent call last)
<ipython-input-38-0d366d3ef8ce> in <module>()
----> 1 sp.call("rsync -av"+" "+ORIG+" "+DEST, shell=False)
/usr/lib/python2.7/subprocess.pyc in call(*popenargs, **kwargs)
491 retcode = call(["ls", "-l"])
492 """
--> 493 return Popen(*popenargs, **kwargs).wait()
494
495
/usr/lib/python2.7/subprocess.pyc in __init__(self, args, bufsize, executable, stdin, stdout, stderr, preexec_fn, close_fds, shell, cwd, env, universal_newlines, startupinfo, creationflags)
677 p2cread, p2cwrite,
678 c2pread, c2pwrite,
--> 679 errread, errwrite)
680
681 if mswindows:
/usr/lib/python2.7/subprocess.pyc in _execute_child(self, args, executable, preexec_fn, close_fds, cwd, env, universal_newlines, startupinfo, creationflags, shell, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite)
1257 if fd is not None:
1258 os.close(fd)
-> 1259 raise child_exception
1260
1261
OSError: [Errno 2] No such file or directory