import sys
path = '/home/sblob/public_html/api/sblob/step.php'
with open(path, 'r') as f:
    lines = f.readlines()
log = "file_put_contents('/tmp/step_trace.log', date('c').' START\\n', FILE_APPEND);\n"
lines.insert(1, log)
with open(path, 'w') as f:
    f.writelines(lines)
print('Done')