From ee526b7d9ad8139413da49e55fae78adc678e1c6 Mon Sep 17 00:00:00 2001
From: Zachary Lentz <zlentz@slac.stanford.edu>
Date: Tue, 25 Jun 2024 14:20:32 -0700
Subject: [PATCH] MAINT: init type annotations, manual/simpler error text

---
 typhos/plugins/core.py | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/typhos/plugins/core.py b/typhos/plugins/core.py
index c292be95..7fe6e947 100644
--- a/typhos/plugins/core.py
+++ b/typhos/plugins/core.py
@@ -80,10 +80,10 @@ class SignalConnection(PyDMConnection):
     def __init__(self, channel, address, protocol=None, parent=None):
         # Create base connection
         super().__init__(channel, address, protocol=protocol, parent=parent)
-        self._connection_open = True
-        self.signal_type = None
-        self.is_float = False
-        self.enum_strs = ()
+        self._connection_open: bool = True
+        self.signal_type: type | None = None
+        self.is_float: bool = False
+        self.enum_strs: tuple[str, ...] = ()
 
         # Collect our signal
         self.signal = self.find_signal(address)
@@ -161,7 +161,9 @@ def cast(self, value):
                 except (TypeError, ValueError):
                     value = str(value)
             else:
-                raise TypeError(f"Invalid combination: {self.enum_strs=} with {self.signal_type=}")
+                raise TypeError(
+                    f"Invalid combination: enum_strs={self.enum_strs} with signal_type={self.signal_type}"
+                )
         elif self.signal_type is np.ndarray:
             value = np.asarray(value)
         else: