This file is a copied implementation from my asciichart repository on GitHub

# -*- coding: utf-8 -*-

# This file is a copied implementation from my asciichart repository on GitHub
# https://github.com/kroitor/asciichart

from math import cos
# from math import sin
from math import pi
from math import floor
from math import ceil


def plot(series, cfg={}):

   minimum = min(series)
   maximum = max(series)

   interval = abs(float(maximum) - float(minimum))
   offset = cfg['offset'] if 'offset' in cfg else 3
   # padding = cfg['padding'] if 'padding' in cfg else '       '
   height = cfg['height'] if 'height' in cfg else interval
   ratio = height / interval
   # print(minimum,ratio,type(minimum))
   min2 = floor(float(minimum) * ratio)
   max2 = ceil(float(maximum) * ratio)

   intmin2 = int(min2)
   intmax2 = int(max2)

   rows = abs(intmax2 - intmin2)
   width = len(series) + offset
   # format = cfg['format'] if 'format' in cfg else lambda x: (padding + '{:.2f}'.format(x))[:-len(padding)]

   result = [[' '] * width for i in range(rows + 1)]

   # axis and labels
   for y in range(intmin2, intmax2 + 1):
       label = '{:8.2f}'.format(float(maximum) - ((y - intmin2) * interval / rows))
       result[y - intmin2][max(offset - len(label), 0)] = label
       result[y - intmin2][offset - 1] = '┼' if y == 0 else '┤'

   y0 = int(series[0] * ratio - min2)
   result[rows - y0][offset - 1] = '┼'  # first value

   for x in range(0, len(series) - 1):  # plot the line
       y0 = int(round(series[x + 0] * ratio) - intmin2)
       y1 = int(round(series[x + 1] * ratio) - intmin2)
       if y0 == y1:
           result[rows - y0][x + offset] = '─'
       else:
           result[rows - y1][x + offset] = '╰' if y0 > y1 else '╭'
           result[rows - y0][x + offset] = '╮' if y0 > y1 else '╯'
           start = min(y0, y1) + 1
           end = max(y0, y1)
           for y in range(start, end):
               result[rows - y][x + offset] = '│'

   return '\n'.join([''.join(row) for row in result])


if __name__ == '__main__':
   width = 180
   series = [15 * cos(i * ((pi * 4) / width)) for i in range(width)]
   print(plot(series))