Python – Read dates from data frames based on criteria in different data frames

I have 2 data frames.
I need to read the value of one data frame based on the value in another data frame

Words:

words = pd. DataFrame()
words['no'] = [1,2,3,4,5,6,7,8,9]
words['word'] = ['cat', 'in', 'hat', 'the', 'dog', 'in', 'love', '!', '<3']
words

Sentence:

sentences =  pd. DataFrame()
sentences['no'] =[1,2,3]
sentences['start'] = [1, 4, 6]
sentences['stop'] = [3, 5, 9]
sentences

The desired output is a text file:

cat in hat
***
the dog
***
in love ! <3

But I can’t get past this step, I tried running the following code:

for x in sentances:
print(words[‘word’][words[‘no’].between(sentences[‘start’], sentences[‘stop’], inclusive = True)

But I returned this error

 File "<ipython-input-16-ae3f5333be66>", line 3
    print(words['word'][words['no'].between(sentences['start'], sentences['stop'], inclusive = True)
                                                                                                    ^
SyntaxError: unexpected EOF while parsing

Set no to the index of words, and then use list understanding to traverse sentences:

v = words.set_index('no')['word']
sentences = [
    ' '.join(v.loc[i:j]) for i, j in zip(sentences['start'], sentences['stop'])
]

or index-independent:

v = words['word'].tolist()
sentences = [
    ' '.join(v[i - 1:j - 1] for i, j in zip(sentences['start'], sentences['stop'])
]

['cat in hat', 'the dog', 'in love ! <3']

Saving to a file from here should be simple:

with open('file.txt', 'w') as f:
    for sent in sentences:
        f.write(sent + '\n')
        f.write('***\n')