In [1]:

    

def fibonacci(n):
    valores = []
    a, b = 0, 1
    while len(valores) < n:
        valores.append(b)
        a, b = b, a + b
    return valores


    

In [2]:

    

fibonacci(10)


    

    
Out[2]:





[1, 1, 2, 3, 5, 8, 13, 21, 34, 55]

In [3]:

    

%timeit fibonacci(1000)


    

    




1000 loops, best of 3: 230 µs per loop

In [4]:

    

def fibonacci_gen(n):
    a, b, i = 0, 1, 0
    while i < n:
        yield b
        a, b = b, a + b
        i += 1


    

In [5]:

    

fibonacci_gen(10)


    

    
Out[5]:





<generator object fibonacci_gen at 0x7f83441583f0>

In [6]:

    

%timeit fibonacci_gen(1000)


    

    




The slowest run took 30.60 times longer than the fastest. This could mean that an intermediate result is being cached 
1000000 loops, best of 3: 270 ns per loop

In [7]:

    

valores = [3, 4, 1, 8, 12, 92, 34, 1, 52, 11, 8]


    

In [8]:

    

[x ** 2 for x in valores]


    

    
Out[8]:





[9, 16, 1, 64, 144, 8464, 1156, 1, 2704, 121, 64]

In [9]:

    

[x ** 2 for x in valores if x < 15]


    

    
Out[9]:





[9, 16, 1, 64, 144, 1, 121, 64]

In [10]:

    

def funcion(x, y):
    print(x, y)


    

In [11]:

    

funcion(3, 4)


    

    




3 4

In [12]:

    

x = 5
def funcion(x, y):
    print(x, y)


    

In [13]:

    

funcion(3, 4)


    

    




3 4

In [14]:

    

z = 5
def funcion(x, y):
    global z
    z = 8
    print(x, y)


    

In [15]:

    

print(z)


    

    




5

In [16]:

    

funcion(3, 4)


    

    




3 4

In [17]:

    

print(z)


    

    




8

In [18]:

    

%%file usuarios.csv
juan,gonzalez,33
pedro,martinez,24
susana,romero,54


    

    




Writing usuarios.csv

In [19]:

    

import csv
with open('usuarios.csv', 'r') as fh:
    for line in csv.reader(fh):
        line = [l.capitalize() for l in line]
        print('Nombre: {}\nApellido: {}\nEdad: {}\n\n'.format(
                line[0], line[1], line[2]))


    

    




Nombre: Juan
Apellido: Gonzalez
Edad: 33


Nombre: Pedro
Apellido: Martinez
Edad: 24


Nombre: Susana
Apellido: Romero
Edad: 54

In [20]:

    

def alcubo(n):
    return n ** 3


    

In [21]:

    

alcubo(5)


    

    
Out[21]:





125

In [22]:

    

import time

def log(f):
    def wrapper(*args, **kwargs):
        st = time.time()
        print('Antes: {}'.format(st))
        resultado = f(*args, **kwargs)
        et = time.time()
        print('Despues: {}'.format(et))
        print('Tiempo total: {}'.format(et - st))
        return resultado
    
    return wrapper


    

In [23]:

    

@log
def alcubo(n):
    return n ** 3


    

In [24]:

    

alcubo(5)


    

    




Antes: 1432863987.6773825
Despues: 1432863987.6774247
Tiempo total: 4.220008850097656e-05






    
Out[24]:





125

In [ ]: