# Clase en vídeo: https://youtu.be/Kp4Mvapo5kc?t=26619

### Functions ###

# Definición

def my_function():

print("Esto es una función")

my_function()

my_function()

my_function()

# Función con parámetros de entrada/argumentos

def sum_two_values(first_value: int, second_value):

print(first_value + second_value)

sum_two_values(5, 7)

sum_two_values(54754, 71231)

sum_two_values("5", "7")

sum_two_values(1.4, 5.2)

# Función con parámetros de entrada/argumentos y retorno

def sum_two_values_with_return(first_value, second_value):

my_sum = first_value + second_value

return my_sum

my_result = sum_two_values(1.4, 5.2)

print(my_result)

my_result = sum_two_values_with_return(10, 5)

print(my_result)

# Función con parámetros de entrada/argumentos por clave

def print_name(name, surname):

print(f"{name} {surname}")

print_name(surname="Moure", name="Brais")

# Función con parámetros de entrada/argumentos por defecto

def print_name_with_default(name, surname, alias="Sin alias"):

print(f"{name} {surname} {alias}")

print_name_with_default("Brais", "Moure")

print_name_with_default("Brais", "Moure", "MoureDev")

# Función con parámetros de entrada/argumentos arbitrarios

def print_upper_texts(*texts):

print(type(texts))

for text in texts:

print(text.upper())

print_upper_texts("Hola", "Python", "MoureDev")

print_upper_texts("Hola")

# Assigning a function to a variable in Python:

def add():

print("We assigned function to variable")

# Assign function to variable

sum = add

# calling function

sum()

# Pass function as a parameter to another function in Python

def display(x):

print("This is display function")

def message():

print("This is message function")

# calling function

display(message())

# Define one function inside another function in Python:

def first():

print("This is outer function")

def second():

print("this is inner function")

second()

# calling outer function

first()

# The function can return another function in Python:

def first():

def second():

print("This function is return type to outer function")

return second

x = first()

x()

# Factorial using the recursive function in python (Demo33.py)

def factorial(n):

if n == 0:

result = 1

else:

result = n * factorial(n - 1)

return result

x = factorial(4)

print("Factorial of 4 is: ", x)

# Lambda Function in Python (Demo35.py)

s = lambda a: a * a

x = s(4)

print(x)

# Lambda Function in Python (Demo36.py)

add = lambda a, b: a + b

x = add(4, 5)

print(x)

# Filter Function in python (Demo37.py)

items_cost = [999, 888, 1100, 1200, 1300, 777]

gt_thousand = filter(lambda x: x > 1000, items_cost)

x = list(gt_thousand)

print("Eligible for discount: ", x)

# Map Function in Python (Demo38.py)

without_gst_cost = [100, 200, 300, 400]

with_gst_cost = map(lambda x: x+10, without_gst_cost)

x=list(with_gst_cost)

print("Without GST items costs: ",without_gst_cost)

print("With GST items costs: ",x)

# Reduce Function (Demo39.py)

from functools import reduce

each_items_costs = [111, 222, 333, 444]

total_cost = reduce(lambda x, y: x+y, each_items_costs)

print(total_cost)

#Decorator

def add(a,b):

res = a + b

return res

print(add(20,30))

print(add(-10,5))

def decor(func): #Here ‘func’ is the the argument/parameter which receives the function

def inner_function(x,y):

if x<0:

x = 0

if y<0:

y = 0

return func(x,y)

return inner_function #Decor returns the func passed to it.

add = decor(add)

print(add(20,30))

print(add(-10,5))

# @ symbol in python

def decor(func):

def inner_function(x,y):

if x<0:

x = 0

if y<0:

y = 0

return func(x,y)

return inner_function

@decor

def sub(a,b):

res = a - b

return res

print(sub(30,20))

print(sub(10,-5))

#Generators in Python

def m():

yield 'Mahesh'

yield 'Suresh'

g = m()

print(g)

print(type(g))

for y in g:

print(y)

def m(x, y):

while x<=y:

yield x

x+=1

g = m(5, 10)

for y in g:

print(y)

#next function in Python

def m():

yield 'Mahesh'

yield 'Suresh'

g = m()

print(type(g))

print(next(g))

print(next(g))

#dir() function in Python

x=10

y=20

def f1():

print("Hello")

print(dir())