Python OS существует
import os
os.path.exists(path_to_file)
Benja
import os
os.path.exists(path_to_file)import os
# Join paths using OS import. Takes any amount of arguments
path = os.path.join('/var/www/public_html', './app/', ".\\my_file.json")
print(path) # /var/www/public_html/app/myfile.json