How to use a regexp here
Cecil Westerhof
Cecil at decebal.nl
Mon Dec 4 07:12:08 EST 2017
Joel Goldstick <joel.goldstick at gmail.com> writes:
> On Mon, Dec 4, 2017 at 5:21 AM, Ned Batchelder <ned at nedbatchelder.com>
> wrote:
>
>> On 12/4/17 4:36 AM, Cecil Westerhof wrote:
>>
>>> I have a script that was running perfectly for some time. It uses:
>>> array = [elem for elem in output if 'CPU_TEMP' in elem]
>>>
>>> But because output has changed, I have to check for CPU_TEMP at the
>>> beginning of the line. What would be the best way to implement this?
>>>
>>>
>> No need for a regex just yet:
>>
>> array = [elem for elem in output if elem.startswith('CPU_TEMP')]
>>
>> (btw, note that the result of this expression is a list, not an array, for
>> future Googling.)
>>
>> --Ned.
>> --
>> https://mail.python.org/mailman/listinfo/python-list
>>
>
> I like Ned's clear answer, but I'm wondering why the original code would
> fail because the substring is at the start of the line, since 'in' would
> still be true no matter where the desired string is placed. It would be
> useful to see some sample data of the old data, and the new data
There is now also a line that starts with:
PCH_CPU_TEMP:
And I do not want that one.
--
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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