update xferfcn._float2str to be more pythonic per @ilayn

murrayrm · murrayrm · commit 693397339aae · 2023-03-25T08:53:13.000-07:00
diff --git a/control/xferfcn.py b/control/xferfcn.py
@@ -75,8 +75,8 @@
 }
 
 def _float2str(value):
-    formatter = "{:" + config.defaults.get('xferfcn.floating_point_format', ':.4g') + "}"
-    return formatter.format(value)
+    _num_format = config.defaults.get('xferfcn.floating_point_format', ':.4g')
+    return f"{value:{_num_format}}"
 
 
 class TransferFunction(LTI):

Original file line number	Diff line number	Diff line change
`@@ -75,8 +75,8 @@`
`75`	`75`	`}`
`76`	`76`
`77`	`77`	`def _float2str(value):`
`78`		`- formatter = "{:" + config.defaults.get('xferfcn.floating_point_format', ':.4g') + "}"`
`79`		`- return formatter.format(value)`
	`78`	`+ _num_format = config.defaults.get('xferfcn.floating_point_format', ':.4g')`
	`79`	`+ return f"{value:{_num_format}}"`
`80`	`80`
`81`	`81`
`82`	`82`	`class TransferFunction(LTI):`