#797: %timeit doesn't recognize [1..10] syntax
----------------------------+-----------------------------------------------
Reporter: jason | Owner: was
Type: defect | Status: reopened
Priority: minor | Milestone: sage-3.4.1
Component: user interface | Resolution:
Keywords: |
----------------------------+-----------------------------------------------
Changes (by SimonKing):
* summary: timeit doesn't recognize [1..10] syntax => %timeit doesn't
recognize [1..10] syntax
Comment:
I somehow got the impression that it is an issue with preparsing, for the
following reason:
{{{
sage: timeit('[1..10]',preparse=False)
------------------------------------------------------------
File "<magic-timeit>", line 6
[1..10]
^
SyntaxError: invalid syntax
}}}
This is the same error as in
{{{
sage: %timeit [1..10]
}}}
In the code, by default preparsing should be done; namely, in
`sage_timer.py` it says
{{{
def sage_timeit(stmt, globals, preparse=None, number = 0, repeat = 3,
precision = 3):
...
if preparse is None:
preparse = interpreter.do_preparse
}}}
Now, we also have
{{{
sage: from sage.misc import interpreter
sage: interpreter.do_preparse
True
}}}
So, it *should* be with preparsing.
For testing, I inserted a line in the code that prints the value of
`preparse`.
The curious thing is that this line is executed when doing
`timeit('[1..10]')` or `timeit.eval('[1..10]')`, but it is ''not''
executed when doing `%timeit [1..10]`.
I was just told that `%timeit ...` should do the same as
`timeit.eval('...')`, but apparently it doesn't. So, perhaps it is a
problem with the `%`?
Can you tell me where the behaviour of `%` is defined?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/797#comment:9>
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