Combine multiple consecutive words in python

debugcn 投稿 Dev

user8871463

I have list of lists as follows.

mycookbook= [["i", "love", "tim", "tam", "and", "chocolate", "ice", "cream"], ["cooking", 
"fresh", "vegetables", "is", "easy"], ["fresh", "vegetables", "and", "fruits", "are", "good", 
"for", "health"]]

I also have a list as follows.

mylist = ["tim tam", "chocolate ice cream", "fresh vegetables and fruits"]

Now, I want to find the consecutive words in mylist and combine them as follows to update mycookbook.

mycookbook = [["i", "love", "tim tam" "and", "chocolate ice cream"], ["cooking", "fresh vegetables", 
"is", "easy"],["fresh vegetables and fruits", "are", "good", "for", "health"]]

I am currently using two words as follows.

for sentence in mycookbook:
    i = 0
    while i < len(sentence) - 1:
        if sentence[i] + ' ' + sentence[i + 1] in mylist:
            sentence[i] += ' ' + sentence[i + 1]
            sentence.pop(i + 1)
        i += 1
print(mycookbook)

Barmar

You need nested loops, one for the starting index of a phrase, the next for the ending index. You can then use a list slice to get all the words in between.

for sentence in mycookbook:
    i = 0
    while i < len(sentence):
        for j in range(i + 1, len(sentence)+1):
            phrase = ' '.join(sentence[i:j])
            if phrase in mylist:
                sentence[i:j] = [phrase]
                break
        i += 1

We can't use for i in range(len(sentence)) because the length of sentence changes whenever we replace a slice with the phrase.

DEMO

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