#TC1017 #mastery17

Hola!

En este caso hice un video para explicar como podemos usar la función “switch” como un condicional cuando tenemos bastantes opciones por tener.

La estructura contiene como parámetro el valor condicionante con el que vamos a trabajar y dentro de los casos van las instrucciones que queremos que realice en caso de que la condición se de.

Dejaré un video donde trabajo con un ejemplo y una breve explicación para poder entender como usar un switch para condiciones múltiples.

Python does not support a character type; these are treated as strings of length one, thos also considered a substring.

To access substrings, use the square brackets for slicing along with the index or indices to obtain your substring.

     Example:

var1= “Hello World”

print (“var1[0]:”, var1[0])

     When the above code is executed, it produces:

var1[0]: H

Gilberto Rogel García

For more info visit:This link

#mastery26

#TC1014

Here is my Mastery27 video where I talk about the dictionaries in Python.

Video: http://www.youtube.com/watch?v=nBzbAcNySwU

#Mastery27 #TC1014

The range() Function

If you do need to iterate over a sequence of numbers, the built-in function range() comes in handy. It generates lists containing arithmetic progressions, e.g.:

>>> range(10)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

The given end point is never part of the generated list; range(10) generates a list of 10 values, exactly the legal indices for items of a sequence of length 10. It is possible to let the range start at another number, or to specify a different increment (even negative):

>>> range(5, 10)
[5, 6, 7, 8, 9]
>>> range(0, 10, 3)
[0, 3, 6, 9]
>>> range(-10, -100, -30)
[-10, -40, -70]

To iterate over the indices of a sequence, combine range() and len() as follows:

>>> a = ['Mary', 'had', 'a', 'little', 'lamb']
>>> for i in range(len(a)):
...     print i, a[i]
... 
0 Mary
1 had
2 a
3 little
4 lamb

My example:

x=[‘mastery25′,’tc1014’]

for i in range (len(x)):

     print (“#”,x[i])

>>>#mastery25

>>>#tc1014

#mastery25

#tc1014

GILBERTO ROGEL GARCÍA

SOURCE: Here