python_basics

in python you have only super basic operations, nu mat functions

to import a library:  "import library"
                      "from (library) import *" <-----everything
you access an object using the . notation
since everything is an object you can access anything. ex: math.cos(0)
they are precompiled c libraries, very fast

Containers-----> high level structures
Lists----------> principal role is to store other object
                 not efficient so don't do a lists of doubles!!!
                 you use numpy arrays 

Tuples---------> they are constants objects one you create them

Dictionaries--->?

+ applied to lists sum the lists not their elements!

you can use arguments in functions that came from the main program
but in that case you obtain a macro and not a real function since it depends 
upon the environment you are using.

function?-----> vedi cosa fa la function in questione.
if you put 3 vertical """ is a string that contain lines and you can add
documentation to the function
##########################################################################
cocalc 
run %pylab inline on jupiter online if you want to see the staff online
           but you can't interact with them
           equivalent to import everything from numpy and matplotlib
           MOST VALUABLE THING IS PROGRAMMING TIME!
           MANDATORY THING YOU HAVE TO REDUCE!
           DON'T OPTIMIZE CODE (YET)
           
ndarray----> multidimensional homogeneus array.
             we will work with them forever.

reshape----> you change how the array looks in memory not how it looks
             you can use that for matrix matrix multiplication in
             c and fortran style for optimal performance