fix readonly reverse bug

Author: you-n-g

qlib/data/dataset/handler.py

@@ -442,15 +442,15 @@ def process_data(self, with_fit: bool = False):
         # shared data processors
         # 1) assign
         _shared_df = self._data
-        if self._is_proc_readonly(self.shared_processors):  # avoid modifying the original data
+        if not self._is_proc_readonly(self.shared_processors):  # avoid modifying the original data
             _shared_df = _shared_df.copy()
         # 2) process
         _shared_df = self._run_proc_l(_shared_df, self.shared_processors, with_fit=with_fit, check_for_infer=True)
 
         # data for inference
         # 1) assign
         _infer_df = _shared_df
-        if self._is_proc_readonly(self.infer_processors):  # avoid modifying the original data
+        if not self._is_proc_readonly(self.infer_processors):  # avoid modifying the original data
             _infer_df = _infer_df.copy()
         # 2) process
         _infer_df = self._run_proc_l(_infer_df, self.infer_processors, with_fit=with_fit, check_for_infer=True)
@@ -466,10 +466,10 @@ def process_data(self, with_fit: bool = False):
             _learn_df = _infer_df
         else:
             raise NotImplementedError(f"This type of input is not supported")
-        if self._is_proc_readonly(self.learn_processors):  # avoid modifying the original  data
+        if not self._is_proc_readonly(self.learn_processors):  # avoid modifying the original  data
             _learn_df = _learn_df.copy()
         # 2) process
-        _learn_df = self._is_proc_readonly(self.learn_processors, with_fit=True, check_for_infer=False)
+        _learn_df = self._run_proc_l(self.learn_processors, with_fit=True, check_for_infer=False)
 
         self._learn = _learn_df