Extract specific elements from a dictionary on the basis of keys and values

January 19, 2023

pos_dict = {'I': 'PRON', 'feel': 'VERB', 'that': 'SCONJ', 'there': 'PRON', 'should': 'AUX', 'not': 'PART', 'be': 'AUX', 'fight': 'NOUN', 'in-between': 'ADP', 'marriage': 'NOUN', '.': 'PUNCT'}

contiguous_values = []
temp = []

for key, value in pos_dict.items():
    if value == 'PRON':
        if temp:
            contiguous_values.append(temp)
        temp = [key]
    elif value == 'NOUN':
        temp.append(key)
        contiguous_values.append(temp)
        temp = []
    else:
        if temp:
            temp.append(key)

print(contiguous_values)

From this pos_dict, I want to extract the words in the sequence :-

The word extracted first should start from ‘PRON’ and ends with ‘NOUN’
But, If after the first discovered ‘NOUN’ there are few more nouns in the sentence then
Extract till those nouns ,until the next ‘PRON’ is found

The pattern should be this –
‘there’: ‘PRON’, ‘should’: ‘AUX’, ‘not’: ‘PART’, ‘be’: ‘AUX’, ‘fight’: ‘NOUN’, ‘in-between’: ‘ADP’, ‘marriage’: ‘NOUN’, ‘.’: ‘PUNCT’

I want to extract this – ‘there’, ‘should’, ‘not’, ‘be’, ‘fight’, ‘in-between’, ‘marriage’, ‘.’

`pos_dict = {‘I’: ‘PRON’, ‘feel’: ‘VERB’, ‘that’: ‘SCONJ’, ‘there’: ‘PRON’, ‘should’: ‘AUX’, ‘not’: ‘PART’, ‘be’: ‘AUX’, ‘fight’: ‘NOUN’, ‘in-between’: ‘ADP’, ‘marriage’: ‘NOUN’, ‘.’: ‘PUNCT’}

contiguous_values = []
temp = []

for key, value in pos_dict.items():
if value == ‘PRON’:
if temp:
contiguous_values.append(temp)
temp = [key]
elif value == ‘NOUN’:
temp.append(key)
contiguous_values.append(temp)
temp = []
else:
if temp:
temp.append(key)

print(contiguous_values)`

I found this – [[‘I’, ‘feel’, ‘that’], [‘there’, ‘should’, ‘not’, ‘be’, ‘fight’], [‘marriage’]]

But, I want – [‘there’, ‘should’, ‘not’, ‘be’, ‘fight’, ‘in-between’, ‘marriage’]

>Solution :

Try this –

contiguous_values = []
temp = []

for key, value in pos_dict.items():
    if value != 'PRON':
        temp.append(key)
    else:
        if temp:
            contiguous_values.append(temp)
        temp = []

# check if the last element is not 'PRON'
if temp:
    contiguous_values.append(temp)

print(contiguous_values)