First level attribute can be unbound

There is a change that you never enter the while loop, which makes the first_level attribute undefined.

Lines 395 to 408 in efcfdb8

    
           idx = 2 
        
           # look for the first level of config_map. 
        
           # It must be done in loop as the key itself can contains '_'. 
        
           while idx < len(splitted_key): 
        
               first_level = self._find_first_level_config(config_key) 
        
               if first_level: 
        
                   break 
        
               config_key += f"_{ splitted_key[idx].lower()}" 
        
               idx += 1 
        
           # no first_level found, the variable is useless. 
        
           if not first_level: 
        
               continue

This can cause the following error.

UnboundLocalError: cannot access local variable 'first_level' where it is not associated with a value

I feel like this should have been caught by some pre-commit hook (e.g. mypy).

Doesn't seem to be so easy to catch this with a pre-commit hook (see python/mypy#2400).

	idx = 2

	# look for the first level of config_map.
	# It must be done in loop as the key itself can contains '_'.
	while idx < len(splitted_key):
	first_level = self._find_first_level_config(config_key)
	if first_level:
	break
	config_key += f"_{ splitted_key[idx].lower()}"
	idx += 1

	# no first_level found, the variable is useless.
	if not first_level:
	continue