wave.py

#!/usr/bin/python3
import numpy as np
import sys
import time
import math
import os

def plot(array, width, height):
        size = len(array)
        y = [array[int(round(k*size/width)):int(round((k+1)*size/width))] for k in range(width)]
        y = [np.mean(k) for k in y]
        y = height*(y-np.min(y))/(np.max(y)-np.min(y))
        res = np.array(list([list('#'*int(round(y[k]))+' '*int(round(height-y[k]))) for k in range(len(y))]))
        res = np.rot90(res, k=1, axes=(0,1))
        for r in res:
                print('\033[94m' + ''.join(r)+'\033[0m')

def f(x):
        return [math.sin(x+k/200) for k in range(-500,500)]

def wave(n=100):
        for k in range(n):
                print(chr(27))
                print('\033c')
                print('\x1bc')
                rows, columns = os.popen('stty size', 'r').read().split()
                plot(f(k), int(columns)+3, int(rows)-1)
                time.sleep(0.1)
                sys.stdout.flush()

if __name__=='__main__':
        wave()