Drawing with Python pychart

1. Install Python:

Download http://download.gna.org/pychart To uncompress and use the command Python setup. py install to install the program.

Home: http://home.gna.org/pychart/ for pychart

For example, the directory I downloaded is c: \ Documents and Settings \ Administrator \ My Documents ents \ downloads \ PyChart-1.39.tar \ PyChart-1.39 \ PyChart-1.39

Installation:

C: \ Documents and Settings \ Administrator \ My Documents ents \ downloads \ PyChart-1.39.tar \ PyChart-1.39 \ PyChart-1.39> Python setup. py install

After installation, If you enable Python >>> import pychart, the installation is successful if no error is reported.

2. Learning documents and examples:

Document: http://home.gna.org/pychart/doc/index.html

Example: http://home.gna.org/pychart/examples/index.html

3 running example:

There are a series of demos in the installation directory of pychart:

C: \ Documents and Settings \ Administrator \ My Documents ents \ downloads \ PyChart-1.39.tar \ PyChart-1.39 \ PyChart-1.39 \ demos.

I thought that the image could be drawn by running it directly. I found that some numbers that I could not understand were printed. So I read the document and found that it was not so interesting.

To produce a postscript chart, just feed the file to Python.

% python linetest.py >linetest.eps

Or, to produce a PDF chart, run Python like below

% python linetest.py --format=pdf >linetest.pdf

The generated PDF file does not have any image or cannot be opened. Therefore, you need to download ghostscript In the FAQ.

Q: Does pychart support windows?

Yes. But you need to install
Pythonand ghostscriptbeforehand.

After installing ghostscript, you must add environment variables to Python.

Example:
From pychart import *
Import sys
Theme. get_options ()

Theme. use_color = true

Can = canvas.init('pic1.png ')

Data = [("foo", 10), ("bar", 20), ("Baz", 30), ("Ao", 40)]

AR = area. t (size = (300,300), legend = legend. t (),
X_grid_style = none, y_grid_style = none)

Plot = pie_plot.t (Data = data, arc_offsets = [0, 10, 0, 10],
Shadow = (2,-2, fill_style.gray50 ),
Label_offset = 25,
Arrow_style = arrow. A3)
Ar. add_plot (PLOT)
Ar. Draw ()

Running result:

To run the built-in example, install the software gsview.

Http://pages.cs.wisc.edu /~ Ghost/gsview/get49.htm

For example, use Python linetest. py> Foo. EPS and then use gsview to open and change the file to view the specific image. However, gsview only supports ps, PDF, and EPs. PNG is not supported. You have to look at how to implement PNG.