3.8.2 C++/Python interface

MathGL provides the interface to a set of languages via SWIG library. Some of these languages support classes. The typical example is Python – which is named in this chapter’s title. Exactly the same classes are used for high-level C++ API. Its feature is using only inline member-functions what make high-level API to be independent on compiler even for binary build.

There are 3 main classes in:

• mglGraph – provide most plotting functions (see MathGL core).
• mglData – provide base data processing (see Data processing). It have an additional feature to access data values. You can use a construct like this: dat[i]=sth; or sth=dat[i] where flat representation of data is used (i.e., i can be in range 0...nx*nx*nz-1). You can also import NumPy arrays as input arguments in Python: mgl_dat = mglData(numpy_dat);.
• mglParse – provide functions for parsing MGL scripts (see MGL scripts).

To use Python classes just execute ‘import mathgl’. The simplest example will be:

import mathgl
a=mathgl.mglGraph()
a.Box()
a.WritePNG("test.png")

Alternatively you can import all classes from mathgl module and easily access MathGL classes like this:

from mathgl import *
a=mglGraph()
a.Box()
a.WritePNG("test.png")

This becomes useful if you create many mglData objects, for example.

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