filepath = '/usr/local/lib/python3.11/site-packages/supar/utils/fn.py'

patch = (
    "import multiprocess as mp\n"
    "from transformers import BertTokenizerFast\n"
    "if not hasattr(BertTokenizerFast, 'split_special_tokens'):\n"
    "    BertTokenizerFast.split_special_tokens = False\n\n"
)

with open(filepath, 'r') as f:
    content = f.read()

if 'split_special_tokens' not in content:
    with open(filepath, 'w') as f:
        f.write(patch + content)

# Confirm patch is at top
first_line = open(filepath).readline()
print(f"First line of fn.py: {first_line}")