related to letter counter

Question

dict={}
for i in range(20):
if i>0:
dict['m']=1
print(dict)

output: ['m':1]

why it does not output 'm':1 20 times ??

Answer 1

Keys in a dictionary are unique, so there can only be one entry with key 'm'. First time 'm': 1 is added to the dictionary, then that entry is set to 1 19 times (no change)

Answer 2

Because keys are unqiue in dictionary

Answer 3

kushal

because a key in a dict is unique...

to store the count of a letter in a dict use:

if key in dict:
dict[key] += 1
else:
dict[key] = 1

so if key exist in dictionary value is increased by one, else it is initialized to one ^^