X-Git-Url: https://scm.cri.ensmp.fr/git/linpy.git/blobdiff_plain/b02f9551644488e5943f968ac847fe4ed7690d6b..5d2a146f1fa8ff16a9de6f35e74d59031fbcb575:/linpy/linexprs.py

diff --git a/linpy/linexprs.py b/linpy/linexprs.py
index b2cec53..492ea9e 100644
--- a/linpy/linexprs.py
+++ b/linpy/linexprs.py
@@ -122,7 +122,7 @@ class LinExpr:
         """
         if not isinstance(symbol, Symbol):
             raise TypeError('symbol must be a Symbol instance')
-        return self._coefficients.get(symbol, 0)
+        return self._coefficients.get(symbol, Fraction(0))
 
     __getitem__ = coefficient
 
@@ -131,8 +131,7 @@ class LinExpr:
         Iterate over the pairs (symbol, value) of linear terms in the
         expression. The constant term is ignored.
         """
-        for symbol, coefficient in self._coefficients.items():
-            yield symbol, coefficient
+        yield from self._coefficients.items()
 
     @property
     def constant(self):
@@ -179,8 +178,7 @@ class LinExpr:
         Iterate over the coefficient values in the expression, and the constant
         term.
         """
-        for coefficient in self._coefficients.values():
-            yield coefficient
+        yield from self._coefficients.values()
         yield self._constant
 
     def __bool__(self):