Add mechanism to specify behaviour of numpy.seterr.

theano/__init__.py

@@ -81,6 +81,36 @@ import gof
 if config.device.startswith('gpu') or config.init_gpu_device.startswith('gpu'):
     import theano.sandbox.cuda
 
+# Use config.numpy to call numpy.seterr
+import numpy
+if config.numpy.seterr_all == 'None':
+    _all = None
+else:
+    _all = config.numpy.seterr_all
+if config.numpy.seterr_divide == 'None':
+    _divide = None
+else:
+    _divide = config.numpy.seterr_divide
+if config.numpy.seterr_over == 'None':
+    _over = None
+else:
+    _over = config.numpy.seterr_over
+if config.numpy.seterr_under == 'None':
+    _under = None
+else:
+    _under = config.numpy.seterr_under
+if config.numpy.seterr_invalid == 'None':
+    _invalid = None
+else:
+    _invalid = config.numpy.seterr_invalid
+numpy.seterr(
+        all=_all,
+        divide=_divide,
+        over=_over,
+        under=_under,
+        invalid=_invalid)
+del _all, _divide, _over, _under, _invalid
+
 ## import scalar_opt
 
 ### This is defined here because it is designed to work across symbolic datatypes

theano/configdefaults.py

@@ -115,6 +115,44 @@ AddConfigVar('experimental.mrg',
              "Another random number generator that work on the gpu",
              BoolParam(False))
 
+AddConfigVar('numpy.seterr_all',
+             ("Sets numpy's behaviour for floating-point errors, ",
+              "see numpy.seterr. "
+              "'None' means not to change numpy's default, which can be "
+              "different for different numpy releases. "
+              "This flag sets the default behaviour for all kinds of floating-"
+              "point errors, its effect can be overriden for specific errors "
+              "by the following flags: seterr_divide, seterr_over, "
+              "seterr_under and seterr_invalid."),
+             EnumStr('ignore', 'warn', 'raise', 'call', 'print', 'log', 'None',
+                 allow_override=False))
+
+AddConfigVar('numpy.seterr_divide',
+             ("Sets numpy's behavior for division by zero, see numpy.seterr. "
+              "'None' means using the default, defined by numpy.seterr_all."),
+             EnumStr('None', 'ignore', 'warn', 'raise', 'call', 'print', 'log',
+                 allow_override=False))
+
+AddConfigVar('numpy.seterr_over',
+             ("Sets numpy's behavior for floating-point overflow, "
+              "see numpy.seterr. "
+              "'None' means using the default, defined by numpy.seterr_all."),
+             EnumStr('None', 'ignore', 'warn', 'raise', 'call', 'print', 'log',
+                 allow_override=False))
+
+AddConfigVar('numpy.seterr_under',
+             ("Sets numpy's behavior for floating-point underflow, "
+              "see numpy.seterr. "
+              "'None' means using the default, defined by numpy.seterr_all."),
+             EnumStr('None', 'ignore', 'warn', 'raise', 'call', 'print', 'log',
+                 allow_override=False))
+
+AddConfigVar('numpy.seterr_invalid',
+             ("Sets numpy's behavior for invalid floating-point operation, "
+              "see numpy.seterr. "
+              "'None' means using the default, defined by numpy.seterr_all."),
+             EnumStr('None', 'ignore', 'warn', 'raise', 'call', 'print', 'log',
+                 allow_override=False))
 
 ###
 ### To disable some warning about old bug that are fixed now.