Python - split file - (Stackoverflow)

# [python - Finding a specific keyword while dividing the large csv into smaller segments, and moving to next row until keyword is found - Stack Overflow](https://stackoverflow.com/questions/78555996/finding-a-specific-keyword-while-dividing-the-large-csv-into-smaller-segments-a)

other_list = []  # for lines
index = 0        # for filenames

with open("combined.con") as infile:
    for line in infile:
        other_list.append(line)
        if len(other_list) >= 5 and line.startswith('END'):
            with open(f"Contingency_{index}.con", 'w') as outfile:
                for item in other_list:
                    outfile.write(item)
            index += 1
            # clear list for next file
            other_list = []

# make sure there is no data (without `END` in last line)
if len(other_list) > 0:
    with open(f"Contingency_{index}.con", 'w') as outfile:
        for item in other_list:
            outfile.write(item)