#!/usr/bin/env python
# coding: utf-8

# # Algunas perlitas

# ## Generadores

# ![](https://upload.wikimedia.org/math/e/b/9/eb920c7c414aba2f2c80d988e8f948eb.png)
# ![](https://upload.wikimedia.org/math/7/2/d/72db5b80fab995f7235d4922d559d783.png)
# ![](https://upload.wikimedia.org/math/6/a/2/6a26a5dd3bf2e82f1818beac0032d4ad.png)

# 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)


# In[3]:


get_ipython().run_line_magic('timeit', 'fibonacci(1000)')


# 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)


# In[6]:


get_ipython().run_line_magic('timeit', 'fibonacci_gen(1000)')


# # List Comprehensions 

# In[7]:


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


# In[8]:


[x ** 2 for x in valores]


# In[9]:


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


# # Espacio de nombres

# In[10]:


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


# In[11]:


funcion(3, 4)


# In[12]:


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


# In[13]:


funcion(3, 4)


# In[14]:


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


# In[15]:


print(z)


# In[16]:


funcion(3, 4)


# In[17]:


print(z)


# # Context Managers

# In[18]:


get_ipython().run_cell_magic('file', 'usuarios.csv', 'juan,gonzalez,33\npedro,martinez,24\nsusana,romero,54\n')


# 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]))


# # Decoradores

# In[20]:


def alcubo(n):
    return n ** 3


# In[21]:


alcubo(5)


# 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)


# In[ ]: