https://www.coursera.org/learn/python-data-processing/supplement/JoVae/word-frequency-counter

word_frequency_counter.py

import collections
import copy
s = "I am a test sentence and I am very cute."
s_list = s.split() 
s_list_backup = copy.deepcopy(s_list)
[s_list.remove(item) for item in s_list_backup if item in ',.!"']
print(collections.Counter(s_list))


s_list = s.split()
for item in s_list:
    if item.strip() not in ',.!"':
        if item not in s_dict:
            s_dict[item] = 1
        else:
            s_dict[item] += 1
print(s_dict)