Fix displaying default if required=True and no default is present. Ad…

…dresses #143

cyclopts/help.py

@@ -249,8 +249,8 @@ def create_parameter_help_panel(group: "Group", iparams, cparams: List[Parameter
             env_vars = " ".join(cparam.env_var)
             help_components.append(rf"[dim]\[env var: {env_vars}][/dim]")
 
-        if not cparam.required and (
-            cparam.show_default or (cparam.show_default is None and iparam.default is not None)
+        if cparam.show_default or (
+            cparam.show_default is None and iparam.default not in {None, inspect.Parameter.empty}
         ):
             default = ""
             if isclass(type_) and issubclass(type_, Enum):

docs/source/api.rst

@@ -256,8 +256,9 @@ API
       :type: Optional[bool]
       :value: None
 
-      Parameter must be supplied.
-      Defaults to required if parameter does not have a default from the function signature.
+      Indicates that the parameter must be supplied on the help-page.
+      Does **not** directly enforce whether or not a parameter must be supplied; only influences the help-page.
+      Defaults to inferring from the function signature; i.e. ``False`` if the parameter has a default, ``True`` otherwise.
 
    .. attribute:: show
       :type: Optional[bool]

tests/test_help.py

@@ -818,6 +818,34 @@ def cmd(
     assert actual == expected
 
 
+def test_help_print_parameter_required(app, console):
+    @app.command(help="Cmd help string.")
+    def cmd(
+        foo: Annotated[str, Parameter(required=False, help="Docstring for foo.")],
+        *,
+        bar: Annotated[str, Parameter(required=True, help="Docstring for bar.")],
+    ):
+        pass
+
+    with console.capture() as capture:
+        app.help_print(["cmd"], console=console)
+
+    actual = capture.get()
+    expected = dedent(
+        """\
+        Usage: app cmd [ARGS] [OPTIONS]
+
+        Cmd help string.
+
+        ╭─ Parameters ───────────────────────────────────────────────────────╮
+        │    FOO,--foo  Docstring for foo.                                   │
+        │ *  --bar      Docstring for bar. [required]                        │
+        ╰────────────────────────────────────────────────────────────────────╯
+        """
+    )
+    assert actual == expected
+
+
 def test_help_print_function_defaults(app, console):
     @app.command(help="Cmd help string.")
     def cmd(