Display proxy protocol scheme on error (#3571)

emmanuel-ferdman · web-flow · commit 336204f0121a · 2025-06-02T20:29:52.000+01:00
diff --git a/httpx/_transports/default.py b/httpx/_transports/default.py
@@ -355,7 +355,7 @@ def __init__(
         else:  # pragma: no cover
             raise ValueError(
                 "Proxy protocol must be either 'http', 'https', 'socks5', or 'socks5h',"
-                " but got {proxy.url.scheme!r}."
+                f" but got {proxy.url.scheme!r}."
             )
 
     async def __aenter__(self: A) -> A:  # Use generics for subclass support.

Original file line number	Diff line number	Diff line change
`@@ -355,7 +355,7 @@ def __init__(`
`355`	`355`	`else: # pragma: no cover`
`356`	`356`	`raise ValueError(`
`357`	`357`	`"Proxy protocol must be either 'http', 'https', 'socks5', or 'socks5h',"`
`358`		`- " but got {proxy.url.scheme!r}."`
	`358`	`+ f" but got {proxy.url.scheme!r}."`
`359`	`359`	`)`
`360`	`360`
`361`	`361`	`async def __aenter__(self: A) -> A: # Use generics for subclass support.`