how to find index of number in list python code example

Example 1: get index of list python

list.index(element)

Example 2: python index of element in list

# alphabets list
alphabets = ['a', 'e', 'i', 'o', 'g', 'l', 'i', 'u']

# index of 'i' in alphabets
index = alphabets.index('i')   # 2
print('The index of i:', index)

# 'i' after the 4th index is searched
index = alphabets.index('i', 4)   # 6
print('The index of i:', index)

# 'i' between 3rd and 5th index is searched
index = alphabets.index('i', 3, 5)   # Error!
print('The index of i:', index)

Example 3: find an index of an item in a list python

#Example List
list = ['apples', 'bannas', 'grapes']
#Use Known Entites In The List To Find The Index Of An Unknown Object
Index_Number_For_Bannas = list.index('apples')
#Print The Object
print(list[Index_Number_For_Bannas])

Example 4: how to find index of list of list in python

[(i, colour.index(c))
 for i, colour in enumerate(colours)
 if c in colour]