pgplot

A simple library adding graph drawing functionality to Pygame
Just download pgplot file - that contains everything needed for full functionality. Then drag the pgplot.py file into the same folder as any program you need it for
Alternatively, run the command 'pip install pgplot' on command prompt/powershell
Then, to use it in your program, add 'import pgplot' at the start.

Don't use negative numbers, they will be drawn off of the graph. Or do, I can't stop you

Usage

Need Pygame. Put pygame.init() and pygame.font.init at the start of your program
Place pgplot.py in your working directory and call import pgplot at the start of your program

Graphing object: graphObj = Pgp(surface, width, height, topleft=None, topright=None, bottomleft=None, bottomright=None, centre=None, drawLine=None)

surface is a Pygame surface object (for example, pg.display.set_mode((width, height)))
MUST specify coordinates for one of: topleft, topright, bottomleft, bottomright, centre. These are used for placing your graph on the screen.
drawLine determines whether the line connecting points will be drawn - can have scatter graphs or line graphs.
Minimum size for graph: 300x300 (anything smaller will be set to this)
Usage example: pgp = Pgp(screen, 450, 450, centre=(500, 500), drawLine=True) - will create a line graph of size 450x450 with centre 500, 500

Usage - after creation

To add a plot: graphObj.addPlot(plotCoords, position=None, line=None)
plotCoords - tuple containing coordinates on the graph, e.g. (2,5)
position can be specified in case you need to add a plot to the middle of the graph. Works like list indices - 0 indexed
line is optional, specify line=2 to add plots to a second line. Only two lines are supported at the moment

Draw graph: graphObj.draw() - call every frame