Upload cid.py

cid.py

@@ -0,0 +1,21 @@
+class CaseInsensitiveDict(dict):
+    def __init__(self, *args, **kwargs):
+        self._keystore = {}
+        d = dict(*args, **kwargs)
+        for k in list(d.keys()):
+            self._keystore[self._get_lower(k)] = k
+        return super(CaseInsensitiveDict,self).__init__(*args,**kwargs)
+
+    def __setitem__(self, k, v):
+        self._keystore[self._get_lower(k)] = k
+        return super(CaseInsensitiveDict, self).__setitem__(k, v)
+
+    def __getitem__(self, k):
+        return super(CaseInsensitiveDict,
+                self).__getitem__(self._keystore[self._get_lower(k)])
+    @staticmethod
+    def _get_lower(k):
+        if isinstance(k,str):
+            return k.lower()
+        else:
+            return k