Hi all,
I'm wondering about the section on creating symbols in
https://github.com/sympy/sympy/wiki/Idioms-and-Antipatterns#strings-as-input
.
It is mildly discouraging importing from sympy.abc because an accidental
"from sympy.abc import *" would clobber I and Q (and possibly others),
and recommends
>>> import symbols
>>> x, y, z = symbols('x y z')
instead.
Now in https://github.com/sympy/sympy/pull/9219 , I applied this advice to
>>> from sympy.abc import t, w, x, y, z, n, k, m, p, i
and got
>>> t, w, x, y, z, n, k, m, p, i = symbols('t w x y z n k m p i')
I think that's actually really dangerous, because it's easy to swap two
letters without noticing so you essentially get the equivalent of
>>> p = Symbol('i')
>>> i = Symbol('p')
with the devious consequence that everything would still work but any
outputs would be utterly confusing because it would print 'p' wherever
the user expects 'i' and vice versa.
So... should I change the wiki to recommend sympy.abc over symbols()?
Regards,
Jo
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