![]() When you plot from a python script, you do. When you plot in an ipython pylab session, you don't need to explicitly invoke pyplot. This is much more robust, and since you are not constantly typing and retyping as you would do at the prompt, the extra typing is well worth it. In contrast, in a python module, you must explicitly import every name which you use. (There are probably names already defined that you don't even know are there and might be using for some other purpose.) ![]() This provides almost 1000 names directly to the ipython shell, which is very convenient, but has great potential for "namespace pollution", i.e. of working by importing all functions into the global namespace. Its original purpose was to mimic a MATLAB-like way. When IPython is started in pylab mode, as in Canopy, then it starts with many imports already done behind the scenes: import numpyįrom matplotlib import pylab, mlab, pyplotįrom import figsize, getfigs pylab is a module that includes matplotlib.pyplot, numpy, numpy.fft, numpy.linalg, numpy.random, and some additional functions, all within. py file), you must always explicitly import all outside names that you wish to use in that module.īy default, Canopy's IPython prompt runs in "Pylab" mode (this can be changed in Canopy's Preferences menu, in the "Python" tab.) The solution is to understand that in each python module (e.g.
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