Python · Dates & Times

Why does perf_counter_ns() exist alongside perf_counter()?

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More in Dates & Times

In the datetime module, which type holds a calendar day only (no clock), which holds a wall-clock time only, and which combines both?

You subtract two datetime objects to get a duration. What type comes back, and what do you call to turn it into a plain number of seconds?

What does this print? ``` from datetime import timedelta d = timedelta(days=32, seconds=29700) print(d.seconds) ```

strftime vs strptime: which one turns a datetime into a formatted string, and which parses a string into a datetime?

You want to parse '19.09.2007 14:30:00' into a datetime. What's wrong with this? ``` datetime.strftime(s, '%d.%m.%Y %H:%M:%S') ```

In strftime/strptime format codes, what's the difference between %Y, %m, %M, and %d?

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