I am working with Python to write a function Here is an example: lettercount(['hello','it','is','me'],'i')
should return ['it-1','is-1']
.
Here is my code:
def lettercount(list, letter):
result = [] #create an empty list
for word in list: #traverse through all the words in the provided list
if word not in result: #from this line I don't know what I'm really doing though
if letter in word:
wrd = "{}-".format(word).append(word.count(letter))
#tried to achieve the same format as provided but failed
result.append(wrd) #this is wrong because str doesn't have the attribute "append"
return result
Can someone give me a hint on this problem? Thanks so much!
The problem is the way you construct wrd
. Change this line -
wrd = "{}-".format(word).append(word.count(letter))
To -
wrd = f"{word}-{word.count(letter)}"
Ps please. avoid using list
as a name of a variable and use, for example, lst
instead since list
is a protected word in Python.
def lettercount(lst, letter): out = [] for word in lst: cnt = sum(1 for l in word if l == letter) if cnt: out.append(f'{word}-{cnt}') return out
Try:
def lettercount(lst, letter):
result = []
for word in lst:
if letter in word:
result.append(word + '-' + str(word.count(letter)))
And I don't recommend naming variables "list" because it's an existing keyword in Python.
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