5.3. Tuples and Sequences section should have the explanation of the indirect way of tuple comprehensions

[hyperkai]

5.3. Tuples and Sequences should have the explanation of the indirect way of tuple comprehensions as shown below:

Tuple comprehensions are not supported but if you really want them, do this with tuple() as shown below:

squares = tuple(x**2 for x in range(10))

[skirpichev]

Tuple comprehensions are not supported but if you really want them, do this with

Tuple docs says you can construct them from iterable, that means support for comprehensions: https://docs.python.org/3/library/stdtypes.html#tuple

Though, I don't see why this should be in the Tutorial. It doesn't mention even the tuple constructor.

[rhettinger]

squares = tuple(x**2 for x in range(10))

This is faster: tuple([x**2 for x in range(10)])

Though, I don't see why this should be in the Tutorial. It doesn't mention even the tuple constructor.

I agree.

[skirpichev]

This is faster: tuple([x**2 for x in range(10)])

Interesting, I got ~x2 speedup on my system even for smaller ranges (when PySequence_Tuple() uses _PyTuple_FromArraySteal()).

I'm closing this, based on Raymond's teaching experience.