add file existence check in __BaseFile._to_read, add read_lines in JsonLineFile

Author: supercoderhawk

pysenal/io/file.py

@@ -320,6 +320,8 @@ def __change_mode(self, mode):
             self._file = open(self.filename, mode, encoding=self.encoding)
 
     def _to_read(self):
+        if not os.path.exists(self.filename):
+            raise FileNotFoundError(self.filename)
         self.__change_mode('r')
 
     def _to_write(self):
@@ -403,6 +405,13 @@ def read_line(self):
         for line in self._file:
             yield json.loads(line)
 
+    def read_lines(self, skip_empty=False, *args, **kwargs):
+        self._to_read()
+        items = []
+        for line in self._file:
+            items.append(json.loads(line))
+        return items
+
     def write(self, data):
         super().write(data)