ENH:Add EA types to read CSV

Closes GH23228

Author: kprestel

pandas/_libs/parsers.pyx

@@ -1229,7 +1229,10 @@ cdef class TextReader:
                 na_count = 0
 
             if result is not None and dtype != 'int64':
-                result = result.astype(dtype)
+                try:
+                    result = result.astype(dtype)
+                except TypeError:
+                    result = result.astype(dtype.numpy_dtype)
 
             return result, na_count
 
@@ -1238,7 +1241,10 @@ cdef class TextReader:
                                            na_filter, na_hashset, na_flist)
 
             if result is not None and dtype != 'float64':
-                result = result.astype(dtype)
+                try:
+                    result = result.astype(dtype)
+                except TypeError:
+                    result = result.astype(dtype.numpy_dtype)
             return result, na_count
 
         elif is_bool_dtype(dtype):

pandas/core/dtypes/common.py

@@ -1872,7 +1872,10 @@ def _get_dtype_type(arr_or_dtype):
     try:
         return arr_or_dtype.dtype.type
     except AttributeError:
-        return type(None)
+        try:
+            return arr_or_dtype.numpy_dtype.type
+        except AttributeError:
+            return type(None)
 
 
 def _get_dtype_from_object(dtype):