mybuddy/reports/graphs/bmi_change.py

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# -*- coding: utf-8 -*-
from django.utils.translation import gettext as _
import plotly.offline as plotly
import plotly.graph_objs as go
from reports import utils
def bmi_change(objects):
"""
Create a graph showing bmi over time.
:param objects: a QuerySet of BMI instances.
:returns: a tuple of the the graph's html and javascript.
"""
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objects = objects.order_by("-date")
trace = go.Scatter(
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name=_("BMI"),
x=list(objects.values_list("date", flat=True)),
y=list(objects.values_list("bmi", flat=True)),
fill="tozeroy",
)
layout_args = utils.default_graph_layout_options()
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layout_args["barmode"] = "stack"
layout_args["title"] = _("<b>BMI</b>")
layout_args["xaxis"]["title"] = _("Date")
layout_args["xaxis"]["rangeselector"] = utils.rangeselector_date()
layout_args["yaxis"]["title"] = _("BMI")
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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)