Pygal examples

Python PyGal Example Snippets

Note: you will need to get PyGal up and running on your box to run these examples. Check out more PyGal documentation and examples here.

PyGal Install

> sudo apt-get install libxml2-dev
> sudo apt-get install libxslt1-dev
> pip install pygal

Line Graph

Description

• This example python code will pull in a summation of all incidents per day for every day that exists within the database. It will do this via the 'alltimesum' API call. More information on what API calls are available can be found here

Python Code

import json
import urllib2
import pygal

# construct our API URL with type parameter set to 'alltimesum'
apiurl = 'http://mcsafetyfeed.org/api/counts.php?type=alltimesum'

# retrieve the JSON object via the API URL
data = json.load( urllib2.urlopen( apiurl ) )

# the count array will hold a list of daily counts, the label array will hold our x-axis labels
counts = []
labels = []

# using PyGal, create a line chart
line_chart = pygal.Line()

# iterate through the returned JSON array and pull out the counts and the incident type labels
for d in data:
	counts.append( int( d["count"] ) )
	labels.append( d["date"].encode("utf8") ) # PyGal no like uni-code ...

# set the title of our chart to something intelligent
line_chart.title = 'Public Safety Incidents per Day'

# set our x-axis labels, as well as the values to be shown on the graph
line_chart.x_labels = labels
line_chart.add('Total Incidents', counts)

# make sure you tip your local wizard after calling this function ....
line_chart.render_in_browser()