Stop a function if the list it needs is empty

[Pedroski55]

I have a function to take theWords, a list of words or phrases, and make an html table with them. Works OK.

Sometimes, I forget to click the button "get the words", so the words list is empty. Nothing happens, no error.

I'd like to catch that with something like:

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if len(theWords) == 0:     echoMessage('You forgot the words Dummkopf!)     exit()

What is the best way to jump out of a function if a condition is not met?

[Gribouillis]

Use return instead of exit().

Depending on the context, it may be preferable to raise an exception

1	raise RuntimeError("You forgot the words Dummkopf!")

the advantage of this is that the code that called the function can detect that an error happened and take appropriate action.

[Pedroski55]

Thanks!

I put this at the top of the function:

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def makeTable():         if len(theWords) == 0:             echoMessage("You forgot the words Dummkopf!")             return;

does the Job nicely! Thanks!