In article <[EMAIL PROTECTED]>,
Lawrence D'Oliveiro <[EMAIL PROTECTED]> wrote:
>In message <[EMAIL PROTECTED]>, Cameron Laird wrote:
>
>> In article <[EMAIL PROTECTED]>,
>> Lawrence D'Oliveiro <[EMAIL PROTECTED]> wrote:
>>
>>>Cameron Laird wrote:
>>>
>>>> I've been trying to decide if there's any sober reason to advocate
>>>> the one-liner
>>>>
>>>> map(lambda i: a.__setitem__(i, False), [x1, x2, x3, ..., x1024])
>>>
>>>Are lambdas like the Dark Side of Python?
>>>
>>>:)
>>
>> Enough so, apparently, that I'm reluctant even to touch that question.
>
>So how else would you express something like
>
> def shell_escape(Arg) :
> """returns Arg suitably escaped for use as a command-line argument
> to Bash."""
> return \
> re.sub \
> (
> r"[\<\>\"\'\|\&\$\#\;\(\)\[\]\{\}\`\!\~\ \\]",
> lambda Match : "\\" + Match.group(0),
> Arg
> )
> # Need to catch anything that might be meaningful to shell
> #end shell_escape
>
>?
I suspect we're confusing each other. I *like* lambdas--at least,
more than Guido does, which I recognize is a low standard.
When I take your question at face value, my response is
def shell_escape(Arg) :
"""returns Arg suitably escaped for use as a command-line argument
to Bash."""
pattern = r"[\<\>\"\'\|\&\$\#\;\(\)\[\]\{\}\`\!\~\ \\]"
def f1(Match):
return
return re.sub(pattern, f1, Arg)
# Need to catch anything that might be meaningful to shell
#end shell_escape
'cept that I'd hope to find a way to simplify pattern. Was that
what you were asking?
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