查找数据集中出现频率最高的单词

Question

I write a function that takes as input a list and returns the most common item in the list.

##Write the function
def most_frequent(List): 
    dict = {} 
    count, itm = 0, '' 
    for item in reversed(List): 
        dict[item] = dict.get(item, 0) + 1
        if dict[item] >= count : 
            count, itm = dict[item], item 
    return(item) 
  
    return num 

# verfiy the code 

list = [5,42,34,6,7,4,2,5]
print(most_frequent(list)) 

and then download two text file to get the most frequent words.

# Download the files restaurants.txt and restaurant-names.txt from Github
!curl https://raw.githubusercontent.com/ipeirotis/introduction-to-python/master/data/restaurant-names.txt -o restaurant-names.txt
!curl https://raw.githubusercontent.com/ipeirotis/introduction-to-python/master/data/restaurants.txt -o restaurants.txt



# create the list from the restaurants.txt
  List = open("restaurants.txt").readlines()

# get the most most frequent restaurant names
print("The most frequent restaurant names is ",most_frequent(List))

print(most_common(List))

but when i try to find the most frequent words that appear in the restaurant names. I got the same result. Could you help to check whether this is correct or not? Thanks

 # create the list from the restaurants.txt
List = open("restaurants.txt").readlines()

# get the most most frequent restaurant names
print("The most frequent restaurant names is ",most_frequent(List))

Answer 1

It's return itm (most common item) instead of return item (last part of your reversed list)

Answer 2

It seems as though you might be using the wrong filename for the restauarant names file. Judging from your curl command:

:curl https.//raw.githubusercontent.com/ipeirotis/introduction-to-python/master/data/restaurant-names.txt -o restaurant-names.txt

The filename you should be using is restaurant-names.txt so your code should be:

 # create the list from the restaurants.txt
List = open("restaurants-names.txt").readlines()

# get the most most frequent restaurant names
print("The most frequent restaurant names is ",most_frequent(List))

Answer 3

It might be the function that is wrong, what if you try the same test data but in a different order, for example: list = [42,5,34,6,5,7,4,2] instead of list = [5,42,34,6,7,4,2,5] , is the output still 5?