draw simple dot plot in terminal

plot_cli.py

#!/usr/bin/env python3

def generate_empty_map(x, y):
    m = []
    for _ in range(y):
        row = []
        for __ in range(x):
            row.append(' ')
        m.append(row)
    return m

def interpolate_value(val, _from, _to):
    val = ((val - _from[0]) / (_from[1] - _from[0]))
    val = (val * (_to[1] - _to[0])) + _to[0]
    return val

def clamp(val, _from, _to):
    if _from > _to:
        print("_from > _to what?")
    if val < _from:
        return _from
    if val > _to:
        return _to
    return val

def output_map(m):
    for line in reversed(m):
        for c in line:
            print(c, end="")
        print("")

def draw_array(x, y):
    if len(x) != len(y):
        print("different input array dimensions")
        return

    h = 25
    w = 80
    m = generate_empty_map(w, h)
    data_limits = {
            "x": (min(x), max(x)),
            "y": (min(y), max(y))
            }
    data_dimension = len(x)
    delta_x = h / data_dimension
    for i, x_val in enumerate(x):
        x_coord = int(interpolate_value(x[i], data_limits['x'], (0, w-1)))
        y_coord = int(interpolate_value(y[i], data_limits['y'], (0, h-1)))
        m[clamp(y_coord, 0, h-1)][clamp(x_coord, 0, w-1)] = 'x'
    output_map(m)

def main():
    x = [64, 128, 256, 512, 1024, 2024]

    y = [700, 760, 1300, 2200, 5700, 12000]
    draw_array(x, y)

if __name__ == "__main__":
    main()