add support for unpacking maps with array keys

Fixes #10

test_umsgpack.py

@@ -128,7 +128,11 @@
     # Complex Array
     [ "complex array", [ True, 0x01, umsgpack.Ext(0x03, b"foo"), 0xff, { 1: False, 2: u"abc" }, b"\x80", [ 1, 2, 3], u"abc" ], b"\x98\xc3\x01\xc7\x03\x03\x66\x6f\x6f\xcc\xff\x82\x01\xc2\x02\xa3\x61\x62\x63\xc4\x01\x80\x93\x01\x02\x03\xa3\x61\x62\x63" ],
     # Complex Map
-    [ "complex map", { 1 : [{1: 2, 3: 4}, {}], 2: 1, 3: [False, u"def"], 4: {0x100000000: u"a", 0xffffffff: u"b"}}, b"\x84\x01\x92\x82\x01\x02\x03\x04\x80\x02\x01\x03\x92\xc2\xa3\x64\x65\x66\x04\x82\xcf\x00\x00\x00\x01\x00\x00\x00\x00\xa1\x61\xce\xff\xff\xff\xff\xa1\x62" ]
+    [ "complex map", { 1 : [{1: 2, 3: 4}, {}], 2: 1, 3: [False, u"def"], 4: {0x100000000: u"a", 0xffffffff: u"b"}}, b"\x84\x01\x92\x82\x01\x02\x03\x04\x80\x02\x01\x03\x92\xc2\xa3\x64\x65\x66\x04\x82\xcf\x00\x00\x00\x01\x00\x00\x00\x00\xa1\x61\xce\xff\xff\xff\xff\xa1\x62" ],
+    # Map with Tuple Keys
+    [ "map with tuple keys", {(u"foo", False, 3) : True, (3e6, -5): u"def"}, b"\x82\x92\xcb\x41\x46\xe3\x60\x00\x00\x00\x00\xfb\xa3\x64\x65\x66\x93\xa3\x66\x6f\x6f\xc2\x03\xc3" ],
+    # Map with Complex Tuple Keys
+    [ "map with complex tuple keys", {(u"foo", (1,2,3), 3) : -5}, b"\x81\x93\xa3\x66\x6f\x6f\x93\x01\x02\x03\x03\xfb" ]
 ]
 
 pack_exception_test_vectors = [
@@ -176,10 +180,10 @@
     [ "insufficient data ext 8-bit", b"\xc7\x05\x05\x01\x02\x03", umsgpack.InsufficientDataException ],
     [ "insufficient data ext 16-bit", b"\xc8\x01\x00\x05\x01\x02\x03", umsgpack.InsufficientDataException ],
     [ "insufficient data ext 32-bit", b"\xc9\x00\x01\x00\x00\x05\x01\x02\x03", umsgpack.InsufficientDataException ],
-    # Unhashable key { 1 : False, [1,2,3] : True }
-    [ "unhashable key", b"\x82\x01\xc2\x93\x01\x02\x03\xc3", umsgpack.UnhashableKeyException ],
     # Unhashable key { 1 : True, { 1 : 1 } : False }
     [ "unhashable key", b"\x82\x01\xc3\x81\x01\x01\xc2", umsgpack.UnhashableKeyException ],
+    # Unhashable key { [ 1, 2, {} ] : True }
+    [ "unhashable key", b"\x81\x93\x01\x02\x80\xc3", umsgpack.UnhashableKeyException ],
     # Key duplicate { 1 : True, 1 : False }
     [ "duplicate key", b"\x82\x01\xc3\x01\xc2", umsgpack.DuplicateKeyException ],
     # Reserved code (0xc1)

umsgpack.py

@@ -1,4 +1,4 @@
-# u-msgpack-python v1.6 - vsergeev at gmail
+# u-msgpack-python v1.8 - vsergeev at gmail
 # https://github.com/vsergeev/u-msgpack-python
 #
 # u-msgpack-python is a lightweight MessagePack serializer and deserializer
@@ -31,7 +31,7 @@
 # THE SOFTWARE.
 #
 """
-u-msgpack-python v1.6 - vsergeev at gmail
+u-msgpack-python v1.8 - vsergeev at gmail
 https://github.com/vsergeev/u-msgpack-python
 
 u-msgpack-python is a lightweight MessagePack serializer and deserializer
@@ -44,7 +44,7 @@
 License: MIT
 """
 
-version = (1,6)
+version = (1,8)
 "Module version tuple"
 
 import struct
@@ -531,6 +531,11 @@ def _unpack_array(code, read_fn):
 
     return [_unpackb(read_fn) for i in range(length)]
 
+def _deep_list_to_tuple(x):
+    if isinstance(x, list):
+        return tuple([_deep_list_to_tuple(e) for e in x])
+    return x
+
 def _unpack_map(code, read_fn):
     if (ord(code) & 0xf0) == 0x80:
         length = (ord(code) & ~0xf0)
@@ -546,15 +551,21 @@ def _unpack_map(code, read_fn):
         # Unpack key
         k = _unpackb(read_fn)
 
-        if not isinstance(k, collections.Hashable):
-            raise UnhashableKeyException("encountered unhashable key type: %s" % str(type(k)))
+        if isinstance(k, list):
+            # Attempt to convert list into a hashable tuple
+            k = _deep_list_to_tuple(k)
+        elif not isinstance(k, collections.Hashable):
+            raise UnhashableKeyException("encountered unhashable key: %s, %s" % (str(k), str(type(k))))
         elif k in d:
             raise DuplicateKeyException("encountered duplicate key: %s, %s" % (str(k), str(type(k))))
 
         # Unpack value
         v = _unpackb(read_fn)
 
-        d[k] = v
+        try:
+            d[k] = v
+        except TypeError:
+            raise UnhashableKeyException("encountered unhashable key: %s" % str(k))
     return d
 
 ########################################