[EXTAPI] refactor weight compression to be used by an external consumer

*lint
*added unit tests
*added typecheck
*added docstring for the api
Change-Id: Ibd4bc40d4381ac40ad2ea3d500b26c4ec565ab07
Signed-off-by: Manupa Karunaratne <manupa.karunaratne@arm.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/ethosu/vela/errors.py b/ethosu/vela/errors.py
index 2c93fbc6..59740aac 100644
--- a/ethosu/vela/errors.py
+++ b/ethosu/vela/errors.py
@@ -15,6 +15,7 @@
 # limitations under the License.
 # Description:
 # Defines custom exceptions.
+import inspect
 import sys
 
 from .operation import Operation
@@ -121,3 +122,20 @@ def TensorError(tens, msg):
 
     print("Error: {}".format(data))
     sys.exit(1)
+
+
+def typecheck(func):
+    def wrapper(*args, **kwargs):
+        fsig = inspect.signature(func)
+        args_zipped = zip(kwargs.values(), fsig.parameters.keys())
+        for actual, expected in args_zipped:
+            expected_type = fsig.parameters[expected].annotation
+            actual_type = type(actual)
+            if expected_type is inspect.Parameter.empty:
+                raise TypeError("Please provide type info for {}, hint = {}".format(expected, actual_type))
+            if expected_type is not actual_type:
+                raise TypeError("expected : {}, but got {}".format(expected_type, actual_type))
+        # Actual execution
+        return func(*args, **kwargs)
+
+    return wrapper