add custom written 'classproperty' decorator

Signed-off-by: Dmitry Chigarev <[email protected]>

modin/pandas/io.py

@@ -74,6 +74,7 @@
     SupportsPublicToNumPy,
     _inherit_docstrings,
     expanduser_path_arg,
+    classproperty,
 )
 
 # below logic is to handle circular imports without errors
@@ -87,27 +88,14 @@ class ModinObjects:
 
     _dataframe = None
 
-    @classmethod
-    def DataFrame(cls, *args, **kwargs):
-        """
-        Build ``modin.pandas.DataFrame`` object with the passed arguments.
-
-        Parameters
-        ----------
-        *args : tuple
-            Positional arguments to pass to the ``modin.pandas.DataFrame`` constructor.
-        **kwargs : dict
-            Keyword arguments to pass to the ``modin.pandas.DataFrame`` constructor.
-
-        Returns
-        -------
-        modin.pandas.DataFrame
-        """
+    @classproperty
+    def DataFrame(cls):
+        """Get ``modin.pandas.DataFrame`` class."""
         if cls._dataframe is None:
             from .dataframe import DataFrame
 
             cls._dataframe = DataFrame
-        return cls._dataframe(*args, **kwargs)
+        return cls._dataframe
 
 
 def _read(**kwargs):

modin/utils.py

@@ -850,3 +850,30 @@ class ModinAssumptionError(Exception):
     """An exception that allows us defaults to pandas if any assumption fails."""
 
     pass
+
+
+class classproperty:
+    """
+    Decorator that allows creating read-only class properties.
+
+    Parameters
+    ----------
+    func : method
+
+    Examples
+    --------
+    >>> class A:
+    ...     field = 10
+    ...     @classproperty
+    ...     def field_x2(cls):
+    ...             return cls.field * 2
+    ...
+    >>> print(A.field_x2)
+    20
+    """
+
+    def __init__(self, func: Any):
+        self.fget = func
+
+    def __get__(self, instance: Any, owner: Any) -> Any:  # noqa: GL08
+        return self.fget(owner)