Expression.symbol moved to Symbol.name

[linpy.git] / pypol / linear.py

diff --git a/pypol/linear.py b/pypol/linear.py
index 3cd7633..621a157 100644 (file)
--- a/pypol/linear.py
+++ b/pypol/linear.py
@@ -69,7 +69,7 @@ class Expression:
         self._coefficients = {}
         for symbol, coefficient in coefficients:
             if isinstance(symbol, Symbol):
-                symbol = str(symbol)
+                symbol = symbol.name
             elif not isinstance(symbol, str):
                 raise TypeError('symbols must be strings or Symbol instances')
             if isinstance(coefficient, Constant):
@@ -126,10 +126,6 @@ class Expression:
             yield self.coefficient(symbol)
         yield self.constant
 
-    @property
-    def symbol(self):
-        raise ValueError('not a symbol: {}'.format(self))
-
     def issymbol(self):
         return False
 
@@ -330,26 +326,26 @@ class Symbol(Expression):
 
     def __new__(cls, name):
         if isinstance(name, Symbol):
-            name = name.symbol
+            name = name.name
         elif not isinstance(name, str):
             raise TypeError('name must be a string or a Symbol instance')
         self = object().__new__(cls)
         self._coefficients = {name: 1}
         self._constant = 0
         self._symbols = tuple(name)
-        self._symbol = name
+        self._name = name
         self._dimension = 1
         return self
 
     @property
-    def symbol(self):
-        return self._symbol
+    def name(self):
+        return self._name
 
     def issymbol(self):
         return True
 
     def __repr__(self):
-        return '{}({!r})'.format(self.__class__.__name__, self._symbol)
+        return '{}({!r})'.format(self.__class__.__name__, self._name)
 
 def symbols(names):
     if isinstance(names, str):