chore(internal): bump pyright / mypy version (#497)

Author: stainless-app[bot]

requirements-dev.lock

@@ -49,7 +49,7 @@ markdown-it-py==3.0.0
     # via rich
 mdurl==0.1.2
     # via markdown-it-py
-mypy==1.10.1
+mypy==1.11.2
 mypy-extensions==1.0.0
     # via mypy
 nodeenv==1.8.0
@@ -70,7 +70,7 @@ pydantic-core==2.18.2
     # via pydantic
 pygments==2.18.0
     # via rich
-pyright==1.1.374
+pyright==1.1.380
 pytest==7.1.1
     # via pytest-asyncio
 pytest-asyncio==0.21.1

src/finch/_utils/_utils.py

@@ -363,12 +363,13 @@ def file_from_path(path: str) -> FileTypes:
 
 def get_required_header(headers: HeadersLike, header: str) -> str:
     lower_header = header.lower()
-    if isinstance(headers, Mapping):
-        for k, v in headers.items():
+    if is_mapping_t(headers):
+        # mypy doesn't understand the type narrowing here
+        for k, v in headers.items():  # type: ignore
             if k.lower() == lower_header and isinstance(v, str):
                 return v
 
-    """ to deal with the case where the header looks like Stainless-Event-Id """
+    # to deal with the case where the header looks like Stainless-Event-Id
     intercaps_header = re.sub(r"([^\w])(\w)", lambda pat: pat.group(1) + pat.group(2).upper(), header.capitalize())
 
     for normalized_header in [header, lower_header, header.upper(), intercaps_header]: