No known mechanism for handling <class 'datetime.date'> → <class 'datetime.date'>; using default

[daniel-klein]

No description provided.

[cliffckerr]

Could you give an example?

[daniel-klein]

If a user updates parameters for a date parameter, like start or stop, a warning is thrown. This is because Pars.update does not recognize datetime.date:

# Perform the update
        for key,new in pars.items():
            if key not in self.keys(): # It's a new parameter and create=True: update directly
                self[key] = new
            else:
                old = self[key] # Get the existing object we're about to update
                if isinstance(old, atomic_classes): # It's a number, string, etc: update directly
                    self[key] = new

                elif isinstance(old, Pars): # It's a Pars object: update recursively
                    old.update(new, create=create)
                elif isinstance(old, ss.ndict): # Update module containers
                    self._update_ndict(key, old, new)
                elif isinstance(old, ss.Module):  # Update modules
                    self._update_module(key, old, new)
                elif isinstance(old, ss.TimePar):
                    self._update_timepar(key, old, new)
                elif isinstance(old, ss.Dist): # Update a distribution
                    self._update_dist(key, old, new)
                elif callable(old): # It's a function: update directly
                    self[key] = new
                elif isinstance(old, dict):
                    self[key] = new # Take dictionaries directly, without warning the user
                else: # Everything else; not used currently but could be
                    warnmsg = f'No known mechanism for handling {type(old)} → {type(new)}; using default'
                    ss.warn(warnmsg)
                    self[key] = new

[daniel-klein]

One possible solution is to add datetime.date to atomic_classes.