Remove a pattern

[dionikolop]

Hello,
I am not sure how to remove a pattern from a wntr.network.model.WaterNetworkModel object. I get the error:
('cannot remove %s %s, still used by %s', 'PatternRegistry', 'PDD10', {('10', 'Junction'), }).
However, I cannot find a way to delete patterns from PatternRegistry.
Thanks in advance!
Dionysis

[kaklise]

You can't remove a Pattern that is being used by a Junction. If you want to remove the Pattern, you need to remove it from all associated Junctions first. Alternatively, you can modify the Pattern or create a new Pattern and assign it to the Junction.

[dionikolop]

Is it possible to loop through all junctions and remove a pattern? I cant find in the references something like a "remove_pattern" method. As for the alternatives, when I assign a new Pattern, the simulation ignores the previous? Say for example in a prolonged simulation I dynamically add "pattern1", then "fire_pattern", then "pattern_2".

[dbhart]

It seems that an easy method for doing this is needed. In the meantime, here is how to do it manually (using Net3.inp as an example, removing pattern ‘2’)

>> wn.remove_pattern('2')

Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/Users/xxxxx/WNTR-master/wntr/network/model.py", line 647, in remove_pattern self._pattern_reg.__delitem__(name) File "/Users/xxxxx/WNTR-master/wntr/network/base.py", line 471, in __delitem__ self._usage[key]) RuntimeError: ('cannot remove %s %s, still used by %s', 'PatternRegistry', '2', {('123', 'Junction'), })

>> wn.patterns.get_usage('2')

{('123', 'Junction'), }

>> node = wn.get_node('123') >> node.demand_timeseries_list

<Demands: [<TimeSeries: base=6.30901964e-05, pattern='2', category='EN2 base'>]>

>> node.demand_timeseries_list[0]

<TimeSeries: base=6.30901964e-05, pattern='2', category='EN2 base'>

>> node.demand_timeseries_list[0].pattern_name = None >> node.demand_timeseries_list[0]

<TimeSeries: base=6.30901964e-05, pattern=None, category='EN2 base'>

>> wn.patterns.remove_usage('2', ('123', 'Junction')) >> wn.remove_pattern('2') >>

I hope that we can add to the @pattern_name.setter function to do the registry add_usage and remove_usage automatically farily soon, and that in the meantime this helps. The result from patterns.get_usage(‘patternname’) is a set, so yes, you can loop through it. From: dionikolop <notifications@github.com> Reply-To: USEPA/WNTR <reply@reply.github.com> Date: Tuesday, March 19, 2019 at 10:06 AM To: USEPA/WNTR <WNTR@noreply.github.com> Cc: Subscribed <subscribed@noreply.github.com> Subject: [EXTERNAL] Re: [USEPA/WNTR] Remove a pattern (#77) Is it possible to loop through all junctions and remove a pattern? I cant find in the references something like a "remove_pattern" method. As for the alternatives, when I assign a new Pattern, the simulation ignores the previous? Say for example in a prolonged simulation I dynamically add "pattern1", then "fire_pattern", then "pattern_2". — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub<#77 (comment)>, or mute the thread<https://github.com/notifications/unsubscribe-auth/AFQ5SdU2IiBB1gdKYuUaC3Z3y3wOfh_tks5vYQsAgaJpZM4b7zt1>.

[balks]

This is still not working for me, even after removing all demands from all nodes with . clear()

for nid, nd in wn.junctions():
    for demand in nd.demand_timeseries_list:
        demand.pattern_name = None
    nd.demand_timeseries_list.clear()

workaround is to write a temporary inp file and load it again (be aware that every node has a standard demand of 0 now):

wn.write_inpfile('tmp.inp')
wn = wntr.network.WaterNetworkModel('tmp.inp')