indexof method in python code example

Example 1: python find index by value

>>> ["foo", "bar", "baz"].index("bar")
1

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: python string indexof

s = "mouse"
animal_letter = s.find('s')
print animal_letter

Example 4: index of python

# Python is a 0-based indexing language, meanign all indices start from 0
list1 = ["Python", "Is", "A", "0", "Based", "Indexing", "language"]
print(list1[0]) # Prints Python.... the element on index 0, 1 in human counting