29-06-2023 (02).py

# introduction to list: it is identified by [] this symbol

lst1 = [1,2,2,3,5,4,6]
lst2 = ["Red", "Green", "Blue"]
print(lst1)
print(lst2)

details = ["Abhijeet", 18, "FYBScIT", 9.8]
print(details)

marks = [3, 5, 6, "Harry", True, 6, 7 , 2, 32, 345, 23]
print(marks)
print(type(marks))
print(marks[0])
print(marks[1])
print(marks[2])
print(marks[3])
print(marks[4])
print(marks[5])
print(marks[-3]) # Negative index
print(marks[len(marks)-3]) # Positive index
print(marks[5-3]) # Positive index
print(marks[2]) # Positive index

if "6" in marks:
  print("Yes")
else:
  print("No")

#Same thing applies for strings as well!
if "Ha" in "Harry":
  print("Yes")

print(marks[0:7])
print(marks[1:9])
print(marks[1:9:3]) # listName[start : end : jumpIndex]

colors = ["Red", "Green", "Blue", "Yellow", "Green"]
#          [0]      [1]     [2]      [3]      [4]
print(colors[2])
print(colors[4])
print(colors[0])

colors = ["Red", "Green", "Blue", "Yellow", "Green"]
#          [-5]    [-4]    [-3]     [-2]      [-1]
print(colors[-1])
print(colors[-3])
print(colors[-5])

colors = ["Red", "Green", "Blue", "Yellow", "Green"]
if "Yellow" in colors:
    print("Yellow is present.")
else:
    print("Yellow is absent.")

colors = ["Red", "Green", "Blue", "Yellow", "Green"]
if "Orange" in colors:
    print("Orange is present.")
else:
    print("Orange is absent.")

animals = ["cat", "dog", "bat", "mouse", "pig", "horse", "donkey", "goat", "cow"]
print(animals[3:7])	#using positive indexes
print(animals[-7:-2])	#using negative indexes'

animals = ["cat", "dog", "bat", "mouse", "pig", "horse", "donkey", "goat", "cow"]
print(animals[4:])	#using positive indexes
print(animals[-4:])	#using negative indexes

animals = ["cat", "dog", "bat", "mouse", "pig", "horse", "donkey", "goat", "cow"]
print(animals[:6])	#using positive indexes
print(animals[:-3])	#using negative indexes

animals = ["cat", "dog", "bat", "mouse", "pig", "horse", "donkey", "goat", "cow"]
print(animals[::2])		#using positive indexes
print(animals[-8:-1:2])	#using negative indexes

animals = ["cat", "dog", "bat", "mouse", "pig", "horse", "donkey", "goat", "cow"]
print(animals[1:8:3])

names = ["Milo", "Sarah", "Bruno", "Anastasia", "Rosa"]
namesWith_O = [item for item in names if "o" in item] # Accepts items with the small letter “o” in the new list
print(namesWith_O)

names = ["Milo", "Sarah", "Bruno", "Anastasia", "Rosa"]
namesWith_O = [item for item in names if (len(item) > 4)] #Accepts items which have more than 4 letters
print(namesWith_O)

lst = [i*i for i in range(10)]
print(lst)
lst = [i*i for i in range(10) if i%2==0]
print(lst)