# string
a, b, c = "123" #  a = "1", b = "2", c ="3"
# list
a, b, c = [1, 2, 3]   #  a = 1, b = 2, c = 3
# range
a, b, c = range(3) #  a = 0, b = 1, c = 2
# set
a, b, c = {1, 2, 3} #  a = 1, b = 2, c = 3
a, b, c = {3, 2, 1} #  a = 1, b = 2, c = 3

# dict
dict_num = {"one": 1, "two": 2, "three": 3}
a, b, c = dict_num # a = "one", b = "two", c = "three"
a, b, c = dict_num.values() #  a = 1, b = 2, c = 3
a, b, c = dict_num.items() # a = ("one", 1), b = ("two", 2), c = ("three", 3)

# assignment to the list
[a, b, c] = 1, 2, 3  #  a = 1, b = 2, c = 3
[a, b, c] = "123" #  a = "1", b = "2", c ="3"

# Examples:

my_tuple = ("Anna", 27, "Python Developer")

name, age, career = my_tuple

print(name, age, career)

# Using starred variables
# *a, *b = 1, 2, 3, 4  # Error: Only one starred expression is allowed
a, *b = 1, 2, 3, 4  # a = 1, b = [2, 3, 4]
print(a, b)

# *a, *b, *c = 1, 2, 3 # Error: Only one starred expression is allowed

# Practice
# Unpacking a tuple 
my_tuple = (1, 2, 3)
a, b, c = my_tuple  # a = 1, b = 2, c = 3
print(a, b, c)
# Unpacking a list

my_list = [4, 5, 6]
d, e, f = my_list  # d = 4, e = 5, f = 6
print(d, e, f)

# Unpacking a string
my_string = "abc"
x, y, z = my_string  # x = "a", y = "b", z = "c"
print(x, y, z)

# Unpacking a set
my_set = {7, 8, 9}
a, b, c = my_set  # a = 7, b = 8, c = 9
print(a, b, c)

# Unpacking a dictionary values
my_dict = {"name": "John", "age": 30, "city": "New York"}
name, age, city = my_dict.values()
print(name, age, city)

# Unpacking a dictionary items
my_dict = {"name": "John", "age": 30, "city": "New York"}
name, age, city = my_dict.items()  # name = ("name", "John"), age = ("age", 30), city = ("city", "New York")
print(name, age, city)

# Unpacking a dictionary vaules into a list
name_list = [name[1], age[1], city[1]]
print(name_list)

# Unpacking a dictionary values into a list using list comprehension
name_list = [name[1] for name in my_dict.items()]  # Extracting names from the dictionary items
print(name_list)

# Unpacking a dictionary items into a list
item_list = [item for item in my_dict.items()]
print(item_list)

my_list = list(my_dict.items())  # Converting dictionary items to a list of tuples
print(my_list)

my_list = list(my_dict.values())  # Converting dictionary values to a list
print(my_list)

# Dropping unneeded variables
# Unpacking with an underscore to ignore variables
my_tuple = (1, 2, 3, 4)
a, b, _, d = my_tuple  # a = 1, b = 2, d = 4
print(a, b, d)

# Unpacking with an underscore to ignore variables in a list
my_list = [5, 6, 7, 8]
e, f, _, g = my_list  # e = 5, f = 6, g = 8
print(e, f, g)

# Unpacking with an underscore to ignore variables in a string
my_string = "xyz"
x, y, _ = my_string  # x = "x", y = "y"
print(x, y)

# Unpacking with an underscore to ignore variables in a set
my_set = {10, 11, 12}
a, b, _ = my_set  # a = 10, b = 11
print(a, b)

# Unpacking with an underscore to ignore variables in a dictionary
my_dict = {"key1": "value1", "key2": "value2", "key3": "value3"}
key1, key2, _ = my_dict  # key1 = "key1", key2 = "key2"
print(key1, key2)

# Unpacking with an underscore to ignore variables in a dictionary values
my_dict = {"name": "Alice", "age": 25, "city": "Wonderland"}
name, age, _ = my_dict.values()  # name = "Alice", age = 25
print(name, age)

# Unpacking with an underscore to ignore variables in a dictionary items
my_dict = {"name": "Bob", "age": 30, "city": "Atlantis"}
name, age, _ = my_dict.items()  # name = ("name", "Bob"), age = ("age", 30)
print(name, age)

# Using unpacking to create a new dictionary from an existing one
my_dict = {"name": "Bob", "age": 30, "city": "Atlantis"}
name, age, _ = my_dict.items()  # name = ("name", "Bob"), age = ("age", 30) tuple
my_new_dict = {name[0]: name[1], age[0]: age[1]}  # Creating a new dictionary
print(my_new_dict)

# Using unpacking to create a new dictionary from an existing one using dict
my_dict = {"name": "Bob", "age": 30, "city": "Atlantis"}
name, age, _ = my_dict.items()  # name = ("name", "Bob"), age = ("age", 30) tuple
my_new_dict = dict(name=name[1], age=age[1])  # Creating a new dictionary
print(my_new_dict)


a, *b, c = 1, 2, 3, 4, 5  # a = 1, b = [2, 3, 4], c = 5
print(a, b, c)

a, _, b, *_ = 1, 2, 3, 4, 5  # a = 1, b = 2, _ = 3, *_ = [4, 5]
print(f"a={a}, b={b}")