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On Aug 17, 2015, at 11:02 AM, Paul Moore wrote:
print(f"Iteration {n}: Took {end-start) seconds")
This illustrates (more) problems I have with arbitrary expressions. First, you've actually made a typo there; it should be "{end-start}" -- notice the trailing curly brace. Second, what if you typoed that as "{end_start}"? According to PEP 498 the original typo above should trigger a SyntaxError and the second a run-time error (NameError?). But how will syntax highlighters and linters help you discover your bugs before you've even saved the file? Currently, a lot of these types of problems can be found much earlier on through the use of such linters. Putting arbitrary expressions in strings will just hide them to these tools for the foreseeable future. I have a hard time seeing how Emacs's syntax highlighting could cope with it for example. Cheers, -Barry