# Return multiple Values

def generate_list(name, num_elements=2): # 2 as default value for num_elements argument

return [name for _ in range(num_elements)] # comprehension in return statements

some_list = generate_list("techecoder", 5) # Function calling using Positional arguments

another_list = generate_list("github", num_elements=6) # Keyword arg should always followed by Positional arg

print(type(some_list)) # type of return should be list, Default return in python is always NONE

print(some_list) # print tuple of names

print(another_list)

# functions with variable arguments,

def students_in_college(college, city1, *students):

print("My name is", college)

print("my college name is: ", city1)

print("The students enrolled are:", students)

list12 = ["Techie", "Coder"]

students_in_college("IIT", "India", "Techie", "Coder")

students_in_college("IIT", "India", *list12) # We have to add * if passing list as students.

# Function calling multiple Keyword arguments

def student_details(**details):

for key, value in details.items():

print(key, value)

detail_dict = {'name': "teche", 'age': 18, 'college': "boston university"}

student_details(**detail_dict) # We have to add ** if passing dict as arguments.

# function to call both variable positional and keyword arguments

def student_in_college(*student_detail, **college):

print("Students--")

for i in student_detail:

print(i)

print()

print("College Details--")

for key, value in college.items():

print(key, value)

student_in_college("Alison", "Bob", "Charlie", name="stanford", city="LA") # Calling both positional and Keyword args

# Function to return multiple values

def add_sub(x, y):

add_results = x + y

sub_results = x - y

return add_results, sub_results

tuple13 = add_sub(6, 5) # return as tuple

result_1, result2 = add_sub(8, 4)

a, _ = add_sub(9, 2) # Put _ if second return value not being used

print(tuple13, result_1, result2, a)

# Global and local variables in function

country = "USA" # Global variable

city = "Seattle" # Global variable

def some_fn():

country1 = "India" # Local variable override global variable

global city # define city as global variable in case same name local variable exist in function

city = city + "-City" # defining local city variable using Global city variable

print("Country: ", country1) # Local value override here and print "India"

print("City: ", city) # Global variable value Seattle print here

some_fn()

# Function Argument passing by value: Impact on only inner print

fruit_list = ["Apple", "Banana"] # Define Global variable

def change_list1(fruit_list):

fruit_list = ["Mango", "Banana"] # Define new local list

print("Inside the function passing by value: ", fruit_list) # This will print updated list

change_list1(fruit_list)

print("Outside the function passing by value: ", fruit_list) # Print global list values only

# Function Argument passing by Reference: Update global List as well.

def change_list2(fruit_list):

fruit_list[1] = "Kiwi"

fruit_list.append("grapes")

print("Inside the function passing by Reference: ", fruit_list)

change_list2(fruit_list)

print("Outside the function passing by Reference: ",

fruit_list) # Print updated List as Global list has been modified in function

# help("modules") this will give all python modules installed in pycharm