>>> ["foo", "bar", "baz"].index("bar")
1
# Find index position of first occurrence of 'Ok' in the list
indexPos = listOfElems.index('Ok')
print('First index of element "Ok" in the list : ', indexPos)
x = ['p','y','t','h','o','n']
print(x.index('o'))
index = np.where(oneD_array == 2)
# To return the index of the first occurence of element x in lst
ind = lst.index(x)
'el' in array