test.py

with open("README.md", "r") as file:
    lines = file.readlines()

new_lines = []
for line in lines:
    if "hub_model_id: " in line:
        new_lines.append(f"hub_model_id: null\n")
    else: new_lines.append(line)
with open("README.md", "w") as file:
    file.writelines(new_lines)