On Tuesday, 2 January 2018 06:58:07 UTC+10, Chris Alemany wrote:
>
>
> It appears the direct editing of the default format variable in twitter.py
> is best.
>
Perhaps not, if only we had turned on debug and looked at the log...
using the format config option in weewx.conf (excuse the station name):
Jan 2 13:05:16 stretch22 weewx[2871]: restx: Twitter: msg: Narangba Test -
weeWX 3.8.0a test2 13:05 Jan 02 2018:\nT: 32.6C\nD: 27.2C\nW: N 0.0kph
gusting to 0.0kph\nH: 80%\nP: 31.10hPa\nDay Rain {dayRain:%.2f}mm\nRain Rate
: 0.0mm/hr\nChill:32.6C\nHIndex:32.6C\nSolar: 924W/m2\nUV: 13\n
#PortAlberni\nhttps://www.alberniweather.ca\nhttps://www.youtube.com/alberniweather
omitting the format config option and overriding _DEFAULT_FORMAT with the
exact same format string (again excuse the station name):
Jan 2 12:55:16 stretch22 weewx[2744]: restx: Twitter: msg: Narangba Test 12
:55 Jan 02 2018:#012T: 32.6C#012D: 27.1C#012W: N 0.0kph gusting to
0.0kph#012H: 80%#012P: 31.10hPa#012Day Rain {dayRain:%.2f}mm#012Rain Rate:
0.0mm/hr#012Chill:32.6C#012HIndex:32.6C#012Solar: 948W/m2#012UV:
13#012#PortAlberni#012https://www.alberniweather.ca#012https://www.youtube.com/alberniweather
The logged line is the string that is passed to Twython to post as a tweet.
The issue is that when parsing a config file configobj does not convert \n
to a linefeed escape sequence but rather it escapes the \n (ie \\n) so that
we end up with a literal \n sequence in the returned string (more generally
configobj converts any escape sequence to literal characters - which is why
using #0a in the format config option did not work either) . Twython,
twitter or whatever ultimately URL encodes this and we end up with a plain \
followed by a n, ie no linefeed. On the other hand, _DEFAULT_FORMAT is a
python string with embedded \n escape sequence and the escape sequence
flows through twitter.py and Twython or twitter URL encodes this escape
sequence as a linefeed and consequently you get the formatted tweet you
seek. A solution that allows the use of a user defined format config option
that supports linefeeds is to intercept the format in the config dict
returned by configobj and replace the literal \n sequence with \n escape
sequence back in. It feels a little hackish to me as it is \n specific but
the adding the highlighted lines to twitter.py (circa line 180) should do
the trick:
if usn is not None:
site_dict['unit_system'] = weewx.units.unit_constants[usn]
loginf('units will be converted to %s' % usn)
try:
site_dict['format'] = site_dict['format'].replace('\\n','\n')
except:
pass
site_dict.setdefault('format', self._DEFAULT_FORMAT)
site_dict.setdefault('format_None', self._DEFAULT_FORMAT_NONE)
site_dict.setdefault('format_utc', False)
Of course _DEFAULT_FORMAT should be set back to its original setting and
the format config option under [[Twitter]] now supports the use of \n to
insert a new line in the tweet. Note there is no need to enclose the format
config
option in any quotes and of course weeWX will need to be restarted for the
changes to take effect.
I will caveat this with I do not use Twitter nor have I tested this on
Twitter.
Gary
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