Finding the index of an item in a list

Question

Given a list [\"foo\", \"bar\", \"baz\"] and an item in the list \"bar\", how do I get its index (1) in Python?

Answer 1

using dictionary , where process the list first and then add the index to it

from collections import defaultdict

index_dict = defaultdict(list)    
word_list =  ['foo','bar','baz','bar','any', 'foo', 'much']

for word_index in range(len(word_list)) :
    index_dict[word_list[word_index]].append(word_index)

word_index_to_find = 'foo'       
print(index_dict[word_index_to_find])

# output :  [0, 5]