列表python 3中的单独元素，不带[]或（），不带换行

Question

I need to pass options to rsync. I do that with

EXCLUDE = [".svn",".dropbox"]
OPTS = "-rltgoi --delay-updates --delete --exclude={:} --chmod=a-w".format(EXCLUDE)

this code prints

-rltgoi --delay-updates --delete --exclude=['.svn', '.dropbox'] --chmod=a-w

[] can't be processed by the shell

I need to pass

-rltgoi --delay-updates --delete --exclude=.svn,.dropbox --chmod=a-w

Answer 1

You need to join EXCLUDE into a comma-separated string:

EXCLUDE = ','.join(EXCLUDE)

You are instead interpolating the list representation, which is not what you want here (note that a list representation includes quoted string values as well).

Answer 2

在将排除项添加到命令之前，应将其加入字符串中。

OPTS = "-rltgoi --delay-updates --delete --exclude={0} --chmod=a-w".format(",".join(EXCLUDE))