1.2.1 (#111)

- Fix: A bug where objective values could be returned as sympy number types has been fixed.

Author: KristianJensen

README.rst

@@ -39,7 +39,7 @@ The following dependencies are needed.
 
 -  `sympy >= 1.0.0 <http://sympy.org/en/index.html>`__
 -  `six >= 1.9.0 <https://pypi.python.org/pypi/six>`__
--  `swiglpk >= 1.3.0 <https://pypi.python.org/pypi/swiglpk>`__
+-  `swiglpk >= 1.4.3 <https://pypi.python.org/pypi/swiglpk>`__
 
 The following are optional dependencies that allow other solvers to be used.
 

optlang/expression_parsing.py

@@ -83,7 +83,7 @@ def _parse_linear_expression(expression, expanded=False, **kwargs):
         if not (var.is_Symbol):
             if var == 1:
                 constant = var
-                offset = coefficients[var]
+                offset = float(coefficients[var])
             elif expanded:
                 raise ValueError("Expression {} seems to be invalid".format(expression))
             else:
@@ -105,7 +105,7 @@ def _parse_quadratic_expression(expression, expanded=False):
     offset = 0
 
     if expression.is_Number:  # Constant expression, no coefficients
-        return expression, linear_coefficients, quadratic_coefficients
+        return float(expression), linear_coefficients, quadratic_coefficients
 
     if expression.is_Mul:
         terms = (expression,)
@@ -117,7 +117,7 @@ def _parse_quadratic_expression(expression, expanded=False):
     try:
         for term in terms:
             if term.is_Number:
-                offset += term
+                offset += float(term)
                 continue
             if term.is_Pow:
                 term = 1.0 * term