mybuddy/reports/graphs/diaperchange_lifetimes.py

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# -*- coding: utf-8 -*-
import plotly.offline as plotly
import plotly.graph_objs as go
from reports import utils
def diaperchange_lifetimes(changes):
"""
Create a graph showing how long diapers last (time between changes).
:param changes: a QuerySet of Diaper Change instances.
:returns: a tuple of the the graph's html and javascript.
"""
changes = changes.order_by('time')
durations = []
last_change = changes.first()
for change in changes[1:]:
duration = change.time - last_change.time
if duration.seconds > 0:
durations.append(duration)
last_change = change
trace = go.Box(
y=[round(d.seconds/3600, 2) for d in durations],
name='Changes',
jitter=0.3,
pointpos=-1.8,
boxpoints='all'
)
layout_args = utils.default_graph_layout_options()
layout_args['height'] = 800
layout_args['title'] = '<b>Diaper Lifetimes</b>'
layout_args['yaxis']['title'] = 'Time between changes (hours)'
layout_args['yaxis']['zeroline'] = False
layout_args['yaxis']['dtick'] = 1
fig = go.Figure({
'data': [trace],
'layout': go.Layout(**layout_args)
})
output = plotly.plot(fig, output_type='div', include_plotlyjs=False)
return utils.split_graph_output(output)