python-count repeated word in a file

count repeated word in a file using python scan line by line.

Python code:
f = open("/home/pi/Desktop/file",'r')

words_dict={}
for i in f.read().split():
    word=i.lower()
    words_dict[word]= words_dict.get(word,0) + 1
for key in words_dict.keys():
    print (str(key)+' = '+str(words_dict[key]))

file:
a23
233
6
544
4
2
4
7
9
0