diff --git a/zerver/data_import/mattermost.py b/zerver/data_import/mattermost.py
index 53e4fc463d..e2f2030828 100644
--- a/zerver/data_import/mattermost.py
+++ b/zerver/data_import/mattermost.py
@@ -65,10 +65,10 @@ def process_user(
     def is_team_admin(user_dict: Dict[str, Any]) -> bool:
         if user_dict["teams"] is None:
             return False
-        for team in user_dict["teams"]:
-            if team["name"] == team_name and "team_admin" in team["roles"]:
-                return True
-        return False
+        return any(
+            team["name"] == team_name and "team_admin" in team["roles"]
+            for team in user_dict["teams"]
+        )
 
     def get_full_name(user_dict: Dict[str, Any]) -> str:
         full_name = "{} {}".format(user_dict["first_name"], user_dict["last_name"])
@@ -809,10 +809,7 @@ def check_user_in_team(user: Dict[str, Any], team_name: str) -> bool:
     if user["teams"] is None:
         # This is null for users not on any team
         return False
-    for team in user["teams"]:
-        if team["name"] == team_name:
-            return True
-    return False
+    return any(team["name"] == team_name for team in user["teams"])
 
 
 def label_mirror_dummy_users(
diff --git a/zerver/lib/markdown/__init__.py b/zerver/lib/markdown/__init__.py
index d5c21c9fd1..aa268690ce 100644
--- a/zerver/lib/markdown/__init__.py
+++ b/zerver/lib/markdown/__init__.py
@@ -768,10 +768,7 @@ class InlineInterestingLinkProcessor(markdown.treeprocessors.Treeprocessor):
         if parsed_url.netloc == "pasteboard.co":
             return False
 
-        for ext in IMAGE_EXTENSIONS:
-            if parsed_url.path.lower().endswith(ext):
-                return True
-        return False
+        return any(parsed_url.path.lower().endswith(ext) for ext in IMAGE_EXTENSIONS)
 
     def corrected_image_source(self, url: str) -> Optional[str]:
         # This function adjusts any URLs from linx.li and
diff --git a/zerver/lib/narrow.py b/zerver/lib/narrow.py
index 41077bd116..64144538dd 100644
--- a/zerver/lib/narrow.py
+++ b/zerver/lib/narrow.py
@@ -121,17 +121,14 @@ def is_web_public_narrow(narrow: Optional[Iterable[Dict[str, Any]]]) -> bool:
     if narrow is None:
         return False
 
-    for term in narrow:
+    return any(
         # Web-public queries are only allowed for limited types of narrows.
         # term == {'operator': 'streams', 'operand': 'web-public', 'negated': False}
-        if (
-            term["operator"] == "streams"
-            and term["operand"] == "web-public"
-            and term["negated"] is False
-        ):
-            return True
-
-    return False
+        term["operator"] == "streams"
+        and term["operand"] == "web-public"
+        and term["negated"] is False
+        for term in narrow
+    )
 
 
 def build_narrow_filter(narrow: Collection[Sequence[str]]) -> Callable[[Mapping[str, Any]], bool]: