AttributeError: 'Tuple' object has no attribute 'is_polynomial' in manualintegrate

[asmeurer]

In [6]: integrate(diff(exp(x + x**2)), x, risch=False)
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-6-cb4aeab52710> in <module>()
----> 1 integrate(diff(exp(x + x**2)), x, risch=False)

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/utilities/decorator.py in threaded_func(expr, *args, **kwargs)
     28                                       func(expr.rhs, *args, **kwargs))
     29             else:
---> 30                 return func(expr, *args, **kwargs)
     31
     32     return threaded_func

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/integrals.py in integrate(*args, **kwargs)
   1528
   1529     if isinstance(integral, Integral):
-> 1530         return integral.doit(deep=False, meijerg=meijerg, conds=conds, risch=risch)
   1531     else:
   1532         return integral

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/integrals.py in doit(self, **hints)
    745                 antideriv = None
    746             else:
--> 747                 antideriv = self._eval_integral(function, xab[0], meijerg=meijerg1, risch=risch)
    748                 if antideriv is None and meijerg1 is True:
    749                     ret = try_meijerg(function, xab)

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/integrals.py in _eval_integral(self, f, x, meijerg, risch)
   1111
   1112             try:
-> 1113                 manual = manualintegrate(g, x)
   1114                 if manual is not None and manual.func != Integral:
   1115                     if manual.has(Integral):

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/manualintegrate.py in manualintegrate(f, var)
    793     sympy.integrals.integrals.Integral
    794     """
--> 795     return _manualintegrate(integral_steps(f, var))

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/manualintegrate.py in integral_steps(integrand, symbol, **options)
    664             )
    665         ),
--> 666         fallback_rule)(integral)
    667     _integral_cache[cachekey] = result
    668     return result

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/strategies/core.py in do_one_rl(expr)
     81     def do_one_rl(expr):
     82         for rl in rules:
---> 83             result = rl(expr)
     84             if result != expr:
     85                 return result

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/strategies/core.py in null_safe_rl(expr)
     61     """ Return original expr if rule returns None """
     62     def null_safe_rl(expr):
---> 63         result = rule(expr)
     64         if result is None:
     65             return expr

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/manualintegrate.py in _alternatives(integral)
    171         alts = []
    172         for rule in rules:
--> 173             result = rule(integral)
    174             if result and not isinstance(result, DontKnowRule) and result != integral:
    175                 alts.append(result)

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/manualintegrate.py in parts_rule(integral)
    356         u, dv, v, du, v_step = steps[0]
    357         rule = PartsRule(u, dv, v_step,
--> 358                          make_second_step(steps[1:], v * du),
    359                          integrand, symbol)
    360         if constant != 1:

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/manualintegrate.py in make_second_step(steps, integrand)
    351                              integrand, symbol)
    352         else:
--> 353             return integral_steps(integrand, symbol)
    354
    355     if steps:

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/manualintegrate.py in integral_steps(integrand, symbol, **options)
    664             )
    665         ),
--> 666         fallback_rule)(integral)
    667     _integral_cache[cachekey] = result
    668     return result

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/strategies/core.py in do_one_rl(expr)
     81     def do_one_rl(expr):
     82         for rl in rules:
---> 83             result = rl(expr)
     84             if result != expr:
     85                 return result

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/strategies/core.py in null_safe_rl(expr)
     61     """ Return original expr if rule returns None """
     62     def null_safe_rl(expr):
---> 63         result = rule(expr)
     64         if result is None:
     65             return expr

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/strategies/core.py in switch_rl(expr)
     91     def switch_rl(expr):
     92         rl = ruledict.get(key(expr), identity)
---> 93         return rl(expr)
     94     return switch_rl
     95

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/strategies/core.py in do_one_rl(expr)
     81     def do_one_rl(expr):
     82         for rl in rules:
---> 83             result = rl(expr)
     84             if result != expr:
     85                 return result

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/strategies/core.py in null_safe_rl(expr)
     61     """ Return original expr if rule returns None """
     62     def null_safe_rl(expr):
---> 63         result = rule(expr)
     64         if result is None:
     65             return expr

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/manualintegrate.py in mul_rule(integral)
    257         return ConstantTimesRule(
    258             coeff, f,
--> 259             integral_steps(f, symbol),
    260             integrand, symbol)
    261

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/manualintegrate.py in integral_steps(integrand, symbol, **options)
    664             )
    665         ),
--> 666         fallback_rule)(integral)
    667     _integral_cache[cachekey] = result
    668     return result

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/strategies/core.py in do_one_rl(expr)
     81     def do_one_rl(expr):
     82         for rl in rules:
---> 83             result = rl(expr)
     84             if result != expr:
     85                 return result

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/strategies/core.py in null_safe_rl(expr)
     61     """ Return original expr if rule returns None """
     62     def null_safe_rl(expr):
---> 63         result = rule(expr)
     64         if result is None:
     65             return expr

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/manualintegrate.py in _alternatives(integral)
    171         alts = []
    172         for rule in rules:
--> 173             result = rule(integral)
    174             if result and not isinstance(result, DontKnowRule) and result != integral:
    175                 alts.append(result)

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/manualintegrate.py in parts_rule(integral)
    315     constant, integrand = integrand.as_coeff_Mul()
    316
--> 317     result = _parts_rule(integrand, symbol)
    318
    319     steps = []

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/manualintegrate.py in _parts_rule(integrand, symbol)
    294
    295     for index, rule in enumerate(liate_rules):
--> 296         result = rule(integrand)
    297
    298         if result:

/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/integrals/manualintegrate.py in pull_out_polys(integrand)
    265     def pull_out_polys(integrand):
    266         integrand = integrand.together()
--> 267         polys = [arg for arg in integrand.args if arg.is_polynomial(symbol)]
    268         if polys:
    269             u = sympy.Mul(*polys)

AttributeError: 'Tuple' object has no attribute 'is_polynomial'

Original issue for #6895: http://code.google.com/p/sympy/issues/detail?id=3796 Original author: https://code.google.com/u/asmeurer@gmail.com/

[lidavidm]

https://github.com/sympy/sympy/pull/2065 addresses this issue.

Original comment: http://code.google.com/p/sympy/issues/detail?id=3796#c1 Original author: https://code.google.com/u/112898427768461421869/