diff options
Diffstat (limited to 'grc/src/platforms/python/FlowGraph.py')
| -rw-r--r-- | grc/src/platforms/python/FlowGraph.py | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/grc/src/platforms/python/FlowGraph.py b/grc/src/platforms/python/FlowGraph.py index 6c9b7f642..cd5635b95 100644 --- a/grc/src/platforms/python/FlowGraph.py +++ b/grc/src/platforms/python/FlowGraph.py @@ -40,6 +40,22 @@ def get_variable_code(variable): class FlowGraph(_FlowGraph): + _eval_cache = dict() + def _eval(self, code, namespace): + """ + Evaluate the code with the given namespace. + @param code a string with python code + @param namespace a dict representing the namespace + @return the resultant object + """ + #check cache + if self._eval_cache.has_key(code) and self._eval_cache[code][0] == namespace: + return self._eval_cache[code][1] + #evaluate + result = eval(code, namespace, namespace) + self._eval_cache[code] = (namespace.copy(), result) + return result + def _get_io_signature(self, pad_key): """ Get an io signature for this flow graph. @@ -135,18 +151,18 @@ class FlowGraph(_FlowGraph): np = dict() for parameter in self.get_parameters(): try: - e = eval(parameter.get_param('value').to_code(), n, n) + e = self._eval(parameter.get_param('value').to_code(), n) np[parameter.get_id()] = e except: pass n.update(np) #merge param namespace #load variables for variable in self.get_variables(): try: - e = eval(get_variable_code(variable), n, n) + e = self._eval(get_variable_code(variable), n) n[variable.get_id()] = e except: pass #make namespace public self.n = n #evaluate - e = eval(expr, self.n, self.n) + e = self._eval(expr, self.n) return e |