this python script will fix SRT files that has extra lines in them

fixSRTWithExtraLines.py

def fixSubtitleWithExtraLines(filePath):
    oldSTR=[]
    with open(filePath, "r") as f:
        oldSTR=f.readlines()

    newSTR=[]
    for element in oldSTR:
        '''remove all the line breaks'''
        if element !="\n" :
            newSTR.append(element)

    '''wherever we see an element with "-->" we'll add a linebreak one index above where we found the said element'''
    for element in newSTR:
        if "-->" in element:
            insert_at = newSTR.index(element) - 1
            '''fix the index is lower than 1, that means thats the start of the srt text, so we wont add line breaks to it'''
            if (insert_at <1):
                continue
            '''this code is responsible to add the line break one index above the element'''
            '''see https://stackoverflow.com/questions/14895599/insert-an-element-at-a-specific-index-in-a-list-and-return-the-updated-list'''
            element = [y for i, x in enumerate(newSTR) for y in (("\n", x) if i == insert_at else (x,))]
            newSTR=element
    with open(filePath, "w") as f:
        '''now change the list to string and write to the file'''
        f.write(''.join(str(e) for e in newSTR))

'''example'''
'''1

00:00:02,378 --> 00:00:03,211

[ footsteps approaching ]



2

00:00:03,295 --> 00:00:04,587

Morty, you got to come on.



3

00:00:04,672 --> 00:00:06,130

henlo im python script

wow morty your python script is working


Look, I love you, Morty, but we

both know you're not as fast as


4

00:00:06,215 --> 00:00:07,048

What's going on?




'''
fixSubtitleWithExtraLines("a.txt")
'''will become'''
'''1
00:00:02,378 --> 00:00:03,211
[ footsteps approaching ]

2
00:00:03,295 --> 00:00:04,587
Morty, you got to come on.

3
00:00:04,672 --> 00:00:06,130
henlo im python script
wow morty your python script is working
Look, I love you, Morty, but we
both know you're not as fast as

4
00:00:06,215 --> 00:00:07,048
What's going on?

'''