Comment #6 on issue 2085 by nicolas.pourcelot: Limit code severely broken.
http://code.google.com/p/sympy/issues/detail?id=2085
The problem seems to be in heuristics():
from sympy.series.limits import heuristics
heuristics(1/x,x,oo,dir='+')
Traceback (most recent call last):
File "<input>", line 1, in <module>
File ".../sympy/series/limits.py", line 101, in heuristics
return heuristics(e.subs(z, 1/z), z, sympify(0), "+")
File ".../sympy/series/limits.py", line 117, in heuristics
raise PoleError(msg % (e, z, z0, dir))
PoleError: Don't know how to calculate the limit(x, x, 0, dir=+), sorry.
heuristics(x,x,oo,dir='+')
Traceback (most recent call last):
File "<input>", line 1, in <module>
File ".../sympy/series/limits.py", line 101, in heuristics
return heuristics(e.subs(z, 1/z), z, sympify(0), "+")
File ".../sympy/series/limits.py", line 117, in heuristics
raise PoleError(msg % (e, z, z0, dir))
PoleError: Don't know how to calculate the limit(1/x, x, 0, dir=+), sorry.
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