I must admit it:
I should have learnt Python before
Economy in Python is very important, because reducing lines of code doesn’t mean poor understanding of the code. I think is the other way around: the shorter, the better.
Writting a one line sentence like this:
variable = "cadena" if (condicion) else "cadena_alternativa"
executed the same than this (shorter, of course!):
variable = "cadena"
variable = "cadena_alternativa"
That’s one of the coolest features Python has. Another cool this is multiple asignation:
a,b = 0, "hola"
or even better, to swap values between variables, all on one line:
a,b = b,a
You can see a little example here.
Lists are a powerful feature, and for simple operations for all members of a list, you can do it this way::
a = [3,4]
print [x*2 for x in a]
Another feature I like when working with lists is map, to transform on list on another list, once a function is applyed to all elements. To run the same as before using map, just write:
def multi(x): return 2 * x
a = [3,4]
print map(multi, a)
You can see the example here. The result is:
List management is one of the most powerful characteristics of Python. Recently, I needed a function to select the first 7 characters of a string, removing the character _:
resultado = 
for fila in matriz:
tmp = str.replace(fila[0:7],"_","")
The previos function was replaced by this (shorter):
return [ str.replace(fila[0:7],"_","") for fila in matriz ]
Even you can add if conditions:
return [ str.replace(fila[0:7],"_","") for fila in matriz if fila == 'hola' ]
Here you have an example of this feature.
Another feature I liked a lot is the fact of “remark” when you are using a global variable inside a function, just by declaring this variable global on the function that use it.
To end with …
I guess that doing the course Introduction to Python on coursera.org has end up convincing me that Python is cool!
Have a nice day!
PD: I found this post (it’s long!!) of some one that has ended almost programming exclusively in Python!!