main.py

#! /usr/bin/python3

from matplotlib import pyplot as plt
from matplotlib import dates
from pyowm_helper import get_temperature

degree_sign= u'\N{DEGREE SIGN}'

def init_plot():
    plt.figure('PyOWM Weather Forecast', figsize=(8,6))
    plt.xlabel('Day')
    plt.ylabel(f'Temperature ({degree_sign}C)' )
    plt.title('Weekly Forecast : Delhi')

def plot_temperatures(days, temp_min, temp_max):
    days = dates.date2num(days)
    bar_min = plt.bar(days-.25, temp_min, width=0.5, color='#4286f4')
    bar_max = plt.bar(days+.25, temp_max, width=0.5, color='#e58510')
    return (bar_min, bar_max)

def label_xaxis(days):
    plt.xticks(days)
    axes = plt.gca()
    xaxis_format = dates.DateFormatter('%m/%d')
    axes.xaxis.set_major_formatter(xaxis_format)


def write_temperatures_on_bar_chart(bar_min, bar_max):
    axes = plt.gca()
    y_axis_max = axes.get_ylim()[1]
    label_offset = y_axis_max * .1
    for bar_chart in [bar_min, bar_max]:
        for index, bar in enumerate(bar_chart):
            height = bar.get_height()
            xpos = bar.get_x() + bar.get_width()/2.0
            ypos = height - label_offset
            label_text = str(int(height)) + degree_sign
            plt.text(xpos, ypos, label_text,
                    horizontalalignment='center',
                    verticalalignment='bottom',
                    color='white')

if __name__ == '__main__':
    with plt.xkcd():
        init_plot()
        days, temp_min, temp_max = get_temperature()
        bar_min, bar_max = plot_temperatures(days, temp_min, temp_max)
        label_xaxis(days)
    write_temperatures_on_bar_chart(bar_min, bar_max)
    
    plt.show()