Question

In ps3a does the test_ps3a.py test harness verify that you have not modified/mutated hand or word_list if you pass all the tests? I'm not sure if I am modifying hand incorrectly. The problem set says that after the call to update_hand the value of hand could be the dictionary

{'a':0, 'q':0, 'l':1, 'm':1, 'u':0, 'i':0}.

I did that using

for i in word:
for k in hand.keys():
if i == k:
hand[i] = hand.get(i, 0) - 1
return hand

Is this modifying hand or not?