Convert string into variable name python

Question

I have the below code. Is this an ok way to do this? I'm wanting to make the dictionary a bit smaller by doing something more like if exec(f"self.{script}"): and only store the script name with the function reference, but that doesn't seem to work and just provides a none. I think I would be ok with this current solution, but I'm not sure if it could be improved.

scripts = { "script1": { "run": self.script1, "function": self.run_script1}, "script2": { "run": self.script2, "function": self.run_script2}, } for script in scripts: if scripts[script]["run"]: try: scripts[script]["function"]() except Exception as e: self.send_error_msg(f"{script} caused an exception: \"{e}\", continuing with next script.")

Samwise · Accepted Answer · 2022-08-11 15:19:25Z

Since you're just iterating over every element in the dictionary, having it as a dictionary with specific keys isn't providing any benefit. I'd suggest just having a list of tuples:

scripts = [ (self.script1, self.run_script1), (self.script2, self.run_script2), ] for should_run, function in scripts: if should_run: try: function() except Exception as e: self.send_error_msg("...")

If you want objects with named attributes instead of tuples whose order you have to keep track of, I'd suggest using a small dataclass rather than a dict:

from dataclasses import dataclass from typing import Callable @dataclass class Script: run: bool function: Callable[[], None] scripts = [ Script(self.script1, self.run_script), Script(self.script2, self.run_script2), ] for script in scripts: if script.run: try: script.function() except Exception as e: self.send_error_msg("...")

Ah! This definitely seems way more manageable and easier to update for the future. I have not used tuples very much so I didn't even think about it. Thanks!

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