How to group data separated by empty lines

February 15, 2024

I have a file that I wanted to group into list. The data are separated by empty lines. How to parse the data properly to get the needed output?

mydata.txt

introA
aboutA1
aboutA2
aboutA3
aboutA4

introB
aboutB1
aboutB2
aboutB3
aboutB4

Current Code:

with open("mydata.txt", "r") as f:
    data = [line.strip() for line in f if line.strip()]

print (data)

Current Output:

['introA', 'aboutA1', 'aboutA2', 'aboutA3', 'aboutA4', 'introB', 'aboutB1', 'aboutB2', 'aboutB3', 'aboutB4']

Needed Output:

"introA":['aboutA1', 'aboutA2', 'aboutA3', 'aboutA4',],
"introB":['aboutB1', 'aboutB2', 'aboutB3', 'aboutB4',],

>Solution :

Here’s a simple example

wordlist = {}
current_header = None

with open("mydata.txt", "r") as f:
    for line in f:
        line = line.rstrip('\n')

        if not line:
            current_header = None
            continue

        if not current_header:
            current_header = line
            wordlist[current_header] = []

        if current_header != line:
            wordlist[current_header].append(line)

print(wordlist)