remove feature to specify required data in Meta

Author: BurnzZ

tests/test_page_inputs.py

@@ -16,19 +16,6 @@ def test_html_response():
     assert response.headers["User-Agent"] == "test agent"
 
 
-def test_meta_required_data():
-    Meta()  # By default, no fields are required.
-
-    class RequiredMeta(Meta):
-        required_data = {"some_data"}
-
-    with pytest.raises(ValueError):
-        RequiredMeta()
-
-    meta = RequiredMeta(some_data=123)
-    assert meta["some_data"] == 123
-
-
 def test_meta_restriction():
     # Any value that conforms with `Meta.restrictions` raises an error
     with pytest.raises(ValueError) as err:

web_poet/page_inputs.py

@@ -41,18 +41,11 @@ class Meta(dict):
     functionalities to ensure consistent and compatible Page Objects across
     different use cases:
 
-    * A class variable named ``required_data`` to ensure consistent
-      arguments. If it's instantiated with missing ``keys`` from
-      ``required_data``, then a ``ValueError`` is raised.
-
     * Ensures that some params with data types that are difficult to
       provide or pass like ``lambdas`` are checked. Otherwise, a ``ValueError``
       is raised.
     """
 
-    # Contains the required "keys" when instantiating and setting attributes.
-    required_data: Set = set()
-
     # Any "value" that returns True for the functions here are not allowed.
     restrictions: Dict = {
         inspect.ismodule: "module",
@@ -68,11 +61,6 @@ class Meta(dict):
     }
 
     def __init__(self, *args, **kwargs) -> None:
-        missing_required_keys = self.required_data - kwargs.keys()
-        if missing_required_keys:
-            raise ValueError(
-                f"These keys are required for instantiation: {missing_required_keys}"
-            )
         for val in kwargs.values():
             self.is_restricted_value(val)
         super().__init__(*args, **kwargs)