![\"python_backend_help_panel\"](\"http:\/\/blog.filipesaraiva.info\/wp-content\/uploads\/2013\/09\/python_backend_help_panel.png\")
<\/a> ![\"python_backend_variable_management\"](\"http:\/\/blog.filipesaraiva.info\/wp-content\/uploads\/2013\/09\/python_backend_variable_management.png\")
<\/a><\/p>\n\u00a0Help Panel on left; Variable Management Panel on right<\/em><\/p>\n Help panel<\/strong><\/p>\n <\/strong>Help panel shows the help output in a separated panel, facilitating the consult of this information. To use it, simply use help command as in python interactive mode, as in example below:<\/p>\n Below a bigger help output, from a python module:<\/p>\n \u00a0 In previous picture, did you see some change in variable management panel?<\/p>\n Variable Management panel<\/strong><\/p>\n <\/strong>Variable management panel is a great feature provide by Cantor, but until now just Octave backend had it. This feature show the variables defined in the session, their values, and allow some interesting functions to manipulate these variables.<\/p>\n You can define a lot of variables in python session and these variables will be shown in the panel. See:<\/p>\n In previous picture, I defined a integer variables x<\/em> and y<\/em>, a string a<\/em>, and two modules: numpy<\/em> and scipy, this last as sc<\/em>. All this values are shown in panel.<\/p>\n Now I will change some values defined previously and will add some others:<\/p>\n See, now I defined a variable aa<\/em> by the concatenation of two a<\/em>‘s; the value of a<\/em> is now aa<\/em>; div<\/em> is the division of y<\/em> by x.<\/em> I have a 2-dimensional matrix mtr<\/em> defined by matrix function from numpy<\/em> module; a python class HelloWorldClass<\/em> and a object hello<\/em>.<\/p>\n I can change the value of some these variable manipulating their values in the panel. For example, I can rewrite the x<\/em> variable from 35 to 350, clicking in value column and typing 350.<\/p>\n But the more interesting features are provide by the buttons bellow this panel. These buttons load python scripts to run some feature. There are: add variable, load variables from a file, save variables to a file and clear all variables in the session.<\/p>\n Add variable is quite simple: a dialog is open and you type the variable and their value:<\/p>\n After save, I will clear the session. The python code loaded is:<\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a>Save\/Load use shelve<\/a> module to save and load the variables of the session. But, it is important to say, this feature don’t save all the variables because shelve module have some limitations. For example, I saved this session to a file named “python_session.txt”. The python code loaded is:<\/p>\n<\/a><\/p>\n<\/a>And, finally, I will load the variables. The python code loaded ans the variable panel is show below:<\/p>\n