Revert and fix astype parameters

Author: Licht-T

pandas/core/internals.py

@@ -535,7 +535,7 @@ def f(m, v, i):
 
         return self.split_and_operate(None, f, False)
 
-    def astype(self, dtype, copy=True, errors='raise', values=None, **kwargs):
+    def astype(self, dtype, copy=False, errors='raise', values=None, **kwargs):
         return self._astype(dtype, copy=copy, errors=errors, values=values,
                             **kwargs)
 
@@ -2679,7 +2679,7 @@ def sp_index(self):
     def kind(self):
         return self.values.kind
 
-    def _astype(self, dtype, copy=True, raise_on_error=True, values=None,
+    def _astype(self, dtype, copy=False, raise_on_error=True, values=None,
                 klass=None, mgr=None, **kwargs):
         if values is None:
             values = self.values

pandas/core/sparse/frame.py

@@ -321,8 +321,9 @@ def _apply_columns(self, func):
             data=new_data, index=self.index, columns=self.columns,
             default_fill_value=self.default_fill_value).__finalize__(self)
 
-    def astype(self, dtype, copy=True, errors='raise'):
-        return self._apply_columns(lambda x: x.astype(dtype, copy, errors))
+    def astype(self, dtype, copy=True, errors='raise', **kwargs):
+        return self._apply_columns(lambda x: x.astype(dtype, copy,
+                                                      errors, **kwargs))
 
     def copy(self, deep=True):
         """