Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 1648 by [email protected]: trigsimp fails
http://code.google.com/p/sympy/issues/detail?id=1648
Hi,
I have a problem using trigsimp.
Following two lines of code:
In [1]: from sympy import *
In [2]: trigsimp(sympify('1.0+sin(x)'))
lead to the error listed below.
If you try to run
In [3]: trigsimp(sympify('1+sin(x)'))
instead, everything works fine:
Out[3]: 1 + sin(x)
What goes wrong here?
Best wishes from Dresden, Germany
Christian
Error Message:
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (74, 0))
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
C:\Programme\pythonxy\startups\<ipython console> in <module>()
C:\Python25\lib\site-packages\sympy\simplify\simplify.pyc in trigsimp(expr,
deep
, recursive)
766 result = g
767 else:
--> 768 result = trigsimp_nonrecursive(expr, deep)
769
770 # do some final simplifications like sin/cos -> tan:
C:\Python25\lib\site-packages\sympy\simplify\simplify.pyc in
trigsimp_nonrecursi
ve(expr, deep)
872 continue
873
--> 874 m = expr.match(pattern)
875 while m is not None:
876 if m[a_t] == 0 or -m[a_t] in m[c].args or m[a_t] +
m[c]
== 0:
C:\Python25\lib\site-packages\sympy\core\basic.pyc in match(self, pattern)
1421 """
1422 pattern = sympify(pattern)
-> 1423 return pattern.matches(self, {})
1424
1425 def solve4linearsymbol(eqn, rhs, symbols = None):
C:\Python25\lib\site-packages\sympy\core\operations.pyc in
_matches_commutative(
pattern, expr, repl_dict, evaluate)
137 d1 = w.matches(last_op, repl_dict)
138 if d1 is not None:
--> 139 d2 = pattern.matches(expr, d1, evaluate=True)
140 if d2 is not None:
141 return d2
C:\Python25\lib\site-packages\sympy\core\operations.pyc in
_matches_commutative(
pattern, expr, repl_dict, evaluate)
98 pat = pat.subs(old, new)
99 if pat != pattern:
--> 100 return pat.matches(expr, repl_dict)
101
102 # handle simple patterns
C:\Python25\lib\site-packages\sympy\core\operations.pyc in
_matches_commutative(
pattern, expr, repl_dict, evaluate)
122 newpattern = pattern.__class__(*wild_part)
123 newexpr = pattern.__class__._combine_inverse(expr,
pattern._
_class__(*exact_part))
--> 124 return newpattern.matches(newexpr, repl_dict)
125
126 # now to real work ;)
C:\Python25\lib\site-packages\sympy\core\operations.pyc in
_matches_commutative(
pattern, expr, repl_dict, evaluate)
135 while tmp:
136 w = tmp.pop()
--> 137 d1 = w.matches(last_op, repl_dict)
138 if d1 is not None:
139 d2 = pattern.matches(expr, d1, evaluate=True)
C:\Python25\lib\site-packages\sympy\core\mul.pyc in matches(pattern, expr,
repl_
dict, evaluate)
543 expr = sympify(expr)
544 if pattern.is_commutative and expr.is_commutative:
--> 545 return AssocOp._matches_commutative(pattern, expr,
repl_dict
, evaluate)
546 # todo for commutative parts, until then use the default
matches
method for non-commutative products
547 return Basic.matches(pattern, expr, repl_dict, evaluate)
C:\Python25\lib\site-packages\sympy\core\operations.pyc in
_matches_commutative(
pattern, expr, repl_dict, evaluate)
122 newpattern = pattern.__class__(*wild_part)
123 newexpr = pattern.__class__._combine_inverse(expr,
pattern._
_class__(*exact_part))
--> 124 return newpattern.matches(newexpr, repl_dict)
125
126 # now to real work ;)
C:\Python25\lib\site-packages\sympy\core\mul.pyc in matches(pattern, expr,
repl_
dict, evaluate)
543 expr = sympify(expr)
544 if pattern.is_commutative and expr.is_commutative:
--> 545 return AssocOp._matches_commutative(pattern, expr,
repl_dict
, evaluate)
546 # todo for commutative parts, until then use the default
matches
method for non-commutative products
547 return Basic.matches(pattern, expr, repl_dict, evaluate)
C:\Python25\lib\site-packages\sympy\core\operations.pyc in
_matches_commutative(
pattern, expr, repl_dict, evaluate)
135 while tmp:
136 w = tmp.pop()
--> 137 d1 = w.matches(last_op, repl_dict)
138 if d1 is not None:
139 d2 = pattern.matches(expr, d1, evaluate=True)
C:\Python25\lib\site-packages\sympy\core\symbol.pyc in matches(pattern,
expr, re
pl_dict, evaluate)
163 if pattern.exclude:
164 for x in pattern.exclude:
--> 165 if x in expr:
166 return None
167 #else:
C:\Python25\lib\site-packages\sympy\core\basic.pyc in __contains__(self,
what)
1122
1123 def __contains__(self, what):
-> 1124 if self == what: return True
1125 for x in self._args:
1126 if what in x:
C:\Python25\lib\site-packages\sympy\core\numbers.pyc in __eq__(self, other)
364 if other.is_irrational: return False
365 return other.__eq__(self)
--> 366 if other.is_comparable: other = other.evalf()
367 if isinstance(other, Number):
368 return bool(mlib.mpf_eq(self._mpf_,
other._as_mpf_val(self._
prec)))
TypeError: unbound method Basic_evalf() must be called with cos instance as
firs
t argument (got nothing instead)
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