Just updated to 0.7.3 (which is the current version, I believe?) and I get
the same result.
Cavendish
On Tuesday, October 15, 2013 6:15:48 PM UTC-4, Cavendish McKay wrote:
>
> Thanks for the quick reply. Perhaps it's a version issue. I'm using 0.7.1.
>
> When I try:
>
> r,b,t = symbols("r,b,t")
> theta = Function('theta')
> x = (r+b)*sin(theta) + r*theta*cos(theta)
>
> I get:
>
> ---------------------------------------------------------------------------TypeError
> Traceback (most recent call
> last)<ipython-input-295-cd4ee94c1264> in <module>() 2 theta =
> Function('theta') 3 ----> 4 x = (r+b)*sin(theta) + r*theta*cos(theta)
> /usr/local/lib/python2.7/dist-packages/sympy/core/cache.pyc in wrapper(*args,
> **kw_args) 99 except KeyError: 100 pass--> 101
> func_cache_it_cache[k] = r = func(*args, **kw_args) 102 return
> r 103 return wrapper
> /usr/local/lib/python2.7/dist-packages/sympy/core/function.pyc in
> __new__(cls, *args, **options) 172 evaluate =
> options.pop('evaluate', True) 173 if evaluate:--> 174
> evaluated = cls.eval(*args) 175 if evaluated is not None:
> 176 return evaluated
> /usr/local/lib/python2.7/dist-packages/sympy/functions/elementary/trigonometric.pyc
> in eval(cls, arg) 159 return 160 --> 161 if
> arg.could_extract_minus_sign(): 162 return -cls(-arg) 163
> TypeError: unbound method could_extract_minus_sign() must be called with
> theta instance as first argument (got nothing instead)
>
>
> I'll upgrade and see if that fixes things.
>
> Cavendish
>
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