invalid syntax

ERROR: Failed on file: .\src\action\browser.py
Traceback (most recent call last):
File "e:\installed_programs\continuum\anaconda2\lib\runpy.py", line 174, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "e:\installed_programs\continuum\anaconda2\lib\runpy.py", line 72, in _run_code
exec code in run_globals
File "E:\installed_programs\Continuum\Anaconda2\Scripts\pipreqs.exe\__main__.py", line 9, in
File "e:\installed_programs\continuum\anaconda2\lib\site-packages\pipreqs\pipreqs.py", line 396, in main
init(args)
File "e:\installed_programs\continuum\anaconda2\lib\site-packages\pipreqs\pipreqs.py", line 341, in init
extra_ignore_dirs=extra_ignore_dirs)
File "e:\installed_programs\continuum\anaconda2\lib\site-packages\pipreqs\pipreqs.py", line 91, in get_all_imports
raise exc
File "", line 308
record2json(os.path.join(config.biil_info_dir/today, f'{self.title}.json'), info=data, day=today)
^
SyntaxError: invalid syntax