Plotting points in python

Absolutely. Matplotlib is the way to go.

The pyplot module provides a nice interface to get simple plots up and running fast, especially if you are familiar with MatLab's plotting environment. Here is a simple example using pyplot:

import matplotlib.pyplot as plt
fig = plt.figure()
ax = fig.add_subplot(111)
x_points = xrange(0,9)
y_points = xrange(0,9)
p = ax.plot(x_points, y_points, 'b')
ax.set_xlabel('x-points')
ax.set_ylabel('y-points')
ax.set_title('Simple XY point plot')
fig.show()

import matplotlib.pyplot as plt 
x = range(1,10) 
y = range(1,10) 
plt.plot(x,y,'o')
plt.show()

Here's a simple line with made up x, y. Note: x and y are lists.

Their lengths should be equal or you'll get a error. Cheers!

I suggest the most good looking plotting library for Python: CairoPlot

You can use the Tkinter canvas widget. It uses rectangular coordinates but of course you can translate to polar. The canvas is pretty much just like it sounds -- a blank canvas on which you can draw points, lines, circles, rectangles, etc.

You could always write a plotting function that uses the turtle module from the standard library.

MathGL is GPL plotting library which have Python interface, arbitrary (including polar) curved coordinates, a lot of plot types, export to PNG, EPS, SVG, widgets, and so on. For 1D plot samples see here.

Have you tried to use pillow?

   from PIL import Image, ImageDraw

   #Set up canvas
   img = Image.new (mode, size)
   draw = ImageDraw.Draw (img)

   #Draw your points
   draw.point (xy, colour)