On 02/04/2019 18:55, Stephen J. Turnbull wrote:
>> = Me
> 3. My most common use case (not very common at that) is for stripping
> annoying prompts off text-based APIs. I'm happy using
> .startswith() and string slicing for that, though your point about
> the repeated use of the string to be stripped off (or worse,
> hard-coding its length) is well made.
I don't understand this use case, specifically the opposition to
hard-coding the length. Although hard-coding the length wouldn't
occur to me in many cases, since I'd use
# remove my bash prompt
prompt_re = re.compile(r'^[^\u0000-\u001f\u007f]+ \d\d:\d\d\$ ')
lines = [prompt_re.sub('', line) for line in lines]
For me it's more often like
input = get_line_from_UART()
if input.startswith("INFO>"):
input = input[5:]
do_something_useful(input)
which is error-prone when you cut and paste for a different prompt
elsewhere and forget to change the slice to match.
--
Rhodri James *-* Kynesim Ltd
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