graphs weight over time, recorded daily using jrnl

plot_weight.py

#!/usr/bin/env python3

import matplotlib as mat
import matplotlib.pyplot as plt
import subprocess
import datetime

if __name__ == '__main__':
    raw = subprocess.check_output('jrnl @weight'.split())
    data = raw.decode('ascii').splitlines()
    data = [d.split(' ') for d in data]
    data = [(d[0],d[3]) for d in data if len(d) == 4]
    data = [(datetime.datetime.strptime(d[0],'%Y-%m-%d'),d[1]) for d in data]
    weights = [float(d[1]) for d in data]
    dates = [d[0].date() for d in data]

    min_weight = min(weights)
    min_date   = dates[weights.index(min_weight)]
    print("Min: {0} on {1}".format(min_weight, min_date))

    max_weight = max(weights)
    max_date   = dates[weights.index(max_weight)]
    print("Max: {0} on {1}".format(max_weight, max_date))

    weight_lost = max_weight - min_weight
    print("Weight lost: {0}".format(weight_lost))


    matdates = mat.dates.date2num([d[0] for d in data])
    plt.plot_date(matdates,weights)
    plt.show()