Made first example argument required

Author: jtc42

examples/components/pdf_component.py

@@ -41,10 +41,8 @@ def data(self):
         """Return a 1D data trace."""
         return [self.noisy_pdf(x) for x in self.x_range]
 
-    def average_data(self, n: int = 10, optlist: List[int] = None):
+    def average_data(self, n: int, optlist: List[int] = [1, 2, 3]):
         """Average n-sets of data. Emulates a measurement that may take a while."""
-        if optlist is None:
-            optlist = [1, 2, 3]
         summed_data = self.data
 
         for _ in range(n):