fruits = ['orange', 'apple', 'pear', 'banana', 'kiwi', 'apple', 'banana']
fruits.count('apple') # count number of apples found in list
# output 2
fruits.count('tangerine') # count number of tangerines in list
# output 0
fruits.index('banana') # find the first index of banana
# output 3
fruits.index('banana', 4) # Find next banana starting a position 4
# output 6
fruits.reverse() # reverse fruits array
fruits
# output ['banana', 'apple', 'kiwi', 'banana', 'pear', 'apple', 'orange']
fruits.append('grape') # append grape at the end of array
fruits
# output ['banana', 'apple', 'kiwi', 'banana', 'pear', 'apple', 'orange', 'grape']
fruits.sort()
fruits
# output ['apple', 'apple', 'banana', 'banana', 'grape', 'kiwi', 'orange', 'pear']
len(fruits) # length of fruits array
# output 8
# loop and print each fruit
for fruit in fruits:
print(fruit)python_list = [1, 2, 3, 4, 5]my_list = [1, 2, '3', True]# We assume this list won't mutate for each example below
len(my_list) # 4
my_list.index('3') # 2
my_list.count(2) # 1 --> count how many times 2 appears
my_list[3] # True
my_list[1:] # [2, '3', True]
my_list[:1] # [1]
my_list[-1] # True
my_list[::1] # [1, 2, '3', True]
my_list[::-1] # [True, '3', 2, 1]
my_list[0:3:2] # [1, '3']
# : is called slicing and has the format [ start : end : step ]txt = "this is a wild string"
print(txt.replace("i", "x")) # print string with all i characters replaced with x
print(txt.replace("i", "x", 2)) # print string with first two i characters found with x
print(txt.upper()) # print string in all uppercase letters
print(txt.lower()) # print string in all uppercase letters
print(ord('A')) # print the ordinal value of a character
print(chr(95)) # print character from its ordinal value
print('Yes' * 5) # print string Yes 5 times
# Reference strings by index
print(txt[0]) # print first letter of string from starting index
print(txt[0:2]) # print first two letters from starting index
print(txt[1:]) # print all characters except the first letter
print(txt[0::2]) # print every second character
print(txt[::-1]) # print string in reverse
print(txt[-1]) # print the last character in a string
print(txt[-2:]) # print the last who characters in a string
# check if a wild is found in txt
if "wild" in txt:
print("wild is found in txt")
# check if a blah is not found in txt
if "blah" not in txt:
print("is not found in txt")
# Check if txt starts with this
if txt.startswith("this"):
print("Starts with this")
# check if txt ends with ing
if txt.endswith("ing"):
print("Ends with ing")
# Split a string into a tuple when the delimiter is first encountered
txt = 'random-data'
data_split = txt.partition('-')
print(data_split)
# output ('random', '-', 'data')
len(txt) # Return length of string
# loop through each character in string
for char in txt:
print(char)
# Display price with commas and 2 digit precision
price = 9749000
display_price = f"My price {price:,.2f}"
print(display_price)a[2] = 15
a[0:3] = [5, 10, 15]
a[5:] = [30, 35, 40]