def matches(pattern, expr, repl_dict={}, evaluate=False):
# this method needs a cleanup.
#print "? :",pattern, expr, repl_dict, evaluate
#if repl_dict:
# return repl_dict
for p,v in repl_dict.items():
if p==pattern:
if v==expr: return repl_dict
return None
assert isinstance(pattern, Derivative)
if isinstance(expr, Derivative):
if len(expr.symbols) == len(pattern.symbols):
#print "MAYBE:",pattern, expr, repl_dict, evaluate
return Basic.matches(pattern, expr, repl_dict, evaluate)
#print "NONE:",pattern, expr, repl_dict, evaluate
return None
#print pattern, expr, repl_dict, evaluate
stop
if pattern.nargs is not None:
if pattern.nargs != expr.nargs:
return None
repl_dict = repl_dict.copy()
repl_dict[pattern] = expr
return repl_dict
def matches(pattern, expr, repl_dict={}, evaluate=False):
if evaluate:
pat = pattern
for old, new in repl_dict.items():
pat = pat.subs(old, new)
if pat != pattern:
return pat.matches(expr, repl_dict)
expr = _sympify(expr)
b, e = expr.as_base_exp()
# special case, pattern = 1 and expr.exp can match to 0
if expr is S.One:
d = repl_dict.copy()
d = pattern.exp.matches(S.Zero, d, evaluate=False)
if d is not None:
return d
d = repl_dict.copy()
d = pattern.base.matches(b, d, evaluate=False)
if d is None:
return None
d = pattern.exp.matches(e, d, evaluate=True)
if d is None:
return Basic.matches(pattern, expr, repl_dict, evaluate)
return d
def matches(pattern, expr, repl_dict={}, evaluate=False):
expr = sympify(expr)
if pattern.is_commutative and expr.is_commutative:
return AssocOp._matches_commutative(pattern, expr, repl_dict,
evaluate)
# todo for commutative parts, until then use the default matches method for non-commutative products
return Basic.matches(pattern, expr, repl_dict, evaluate)
def matches(pattern, expr, repl_dict={}, evaluate=False):
# this method needs a cleanup.
#print "? :",pattern, expr, repl_dict, evaluate
#if repl_dict:
# return repl_dict
for p, v in repl_dict.items():
if p == pattern:
if v == expr: return repl_dict
return None
assert isinstance(pattern, Derivative)
if isinstance(expr, Derivative):
if len(expr.symbols) == len(pattern.symbols):
#print "MAYBE:",pattern, expr, repl_dict, evaluate
return Basic.matches(pattern, expr, repl_dict, evaluate)
#print "NONE:",pattern, expr, repl_dict, evaluate
return None
#print pattern, expr, repl_dict, evaluate
stop
if pattern.nargs is not None:
if pattern.nargs != expr.nargs:
return None
repl_dict = repl_dict.copy()
repl_dict[pattern] = expr
return repl_dict
def matches(pattern, expr, repl_dict={}, evaluate=False):
Basic.matches.__doc__
if evaluate:
pat = pattern
for old,new in repl_dict.items():
pat = pat.subs(old, new)
if pat!=pattern:
return pat.matches(expr, repl_dict)
expr = Basic.sympify(expr)
b, e = expr.as_base_exp()
# special case, pattern = 1 and expr.exp can match to 0
if isinstance(expr, Basic.One):
d = repl_dict.copy()
d = pattern.exp.matches(Basic.Integer(0), d, evaluate=False)
if d is not None:
return d
d = repl_dict.copy()
d = pattern.base.matches(b, d, evaluate=False)
if d is None:
return None
d = pattern.exp.matches(e, d, evaluate=True)
if d is None:
return Basic.matches(pattern, expr, repl_dict, evaluate)
return d
def matches(pattern, expr, repl_dict={}, evaluate=False):
if evaluate:
pat = pattern
for old,new in repl_dict.items():
pat = pat.subs(old, new)
if pat!=pattern:
return pat.matches(expr, repl_dict)
expr = _sympify(expr)
b, e = expr.as_base_exp()
# special case, pattern = 1 and expr.exp can match to 0
if expr is S.One:
d = repl_dict.copy()
d = pattern.exp.matches(S.Zero, d, evaluate=False)
if d is not None:
return d
d = repl_dict.copy()
d = pattern.base.matches(b, d, evaluate=False)
if d is None:
return None
d = pattern.exp.matches(e, d, evaluate=True)
if d is None:
return Basic.matches(pattern, expr, repl_dict, evaluate)
return d
def matches(self, expr, repl_dict={}, evaluate=False):
# this method needs a cleanup.
if self in repl_dict:
if repl_dict[self] == expr:
return repl_dict
else:
return None
if isinstance(expr, Derivative):
if len(expr.symbols) == len(self.symbols):
# print "MAYBE:",self, expr, repl_dict, evaluate
return Basic.matches(self, expr, repl_dict, evaluate)
# print "NONE:",self, expr, repl_dict, evaluate
return None
# print self, expr, repl_dict, evaluate
stop
if self.nargs is not None:
if self.nargs != expr.nargs:
return None
repl_dict = repl_dict.copy()
repl_dict[self] = expr
return repl_dict
def matches(self, expr, repl_dict={}, evaluate=False):
if evaluate:
return self.subs(repl_dict).matches(expr, repl_dict)
expr = _sympify(expr)
b, e = expr.as_base_exp()
# special case, pattern = 1 and expr.exp can match to 0
if expr is S.One:
d = repl_dict.copy()
d = self.exp.matches(S.Zero, d)
if d is not None:
return d
d = repl_dict.copy()
d = self.base.matches(b, d)
if d is None:
return None
d = self.exp.subs(d).matches(e, d)
if d is None:
return Basic.matches(self, expr, repl_dict, evaluate)
return d
def matches(pattern, expr, repl_dict={}, evaluate=False):
expr = sympify(expr)
if pattern.is_commutative and expr.is_commutative:
return AssocOp._matches_commutative(pattern, expr, repl_dict, evaluate)
# todo for commutative parts, until then use the default matches method for non-commutative products
return Basic.matches(pattern, expr, repl_dict, evaluate)