Python supports creating complex numbers using the following syntax:
imagnumber ::= (floatnumber | intpart) ("j" | "J")
Right now, the preparser botches this and makes it give an error:
sage: 1j
------------------------------------------------------------
File "<ipython console>", line 1
Integer(1)j
^
SyntaxError: invalid syntax
Currently, if we use "raw" numbers, things work:
sage: 1rj
1j
sage: 1rj == complex('j')
True
However, the preparser probably ought to be fixed so that it supports
the python syntax. The ticket is:
http://trac.sagemath.org/sage_trac/ticket/4501
Mike Hansen detailed a possible fix that is noted on the ticket.
However, it leaves a question open:
Should "1j" in Sage give a Sage complex number or a python complex
number? Giving a Sage complex number would probably be more consistent,
with 1jr giving a python complex number.
Thanks,
Jason
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