def get_value(self):
"""
"""
# for access to the sympy-safe expr, just use self._expr
expr = self._value
for var in self._vars:
# update to current unique twig
var.update_user_label() # update curly label
#~ print "***", expr, var.safe_label, var.curly_label
expr = expr.replace(str(var.safe_label), str(var.curly_label))
return expr
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