Reduce indentation

src/pyobo/api/utils.py

@@ -55,8 +55,7 @@ def get_version(prefix: str) -> Optional[str]:
 
 @lru_cache(1)
 def get_version_pins() -> dict[str, str]:
-    """
-    Retrieve user-defined resource version pins.
+    """Retrieve user-defined resource version pins.
 
     To set your own resource pins, set your machine's environmental variable
     "PYOBO_VERSION_PINS" to a JSON string containing string resource prefixes
@@ -69,32 +68,29 @@ def get_version_pins() -> dict[str, str]:
     """
     version_pins_str = os.getenv("PYOBO_VERSION_PINS")
     if not version_pins_str:
-        version_pins = {}
-    else:
-        try:
-            version_pins = json.loads(version_pins_str)
-        except ValueError as e:
-            logger.error(
-                "The value for the environment variable PYOBO_VERSION_PINS "
-                "must be a valid JSON string: %s" % e
-            )
-            version_pins = {}
-        invalid_prefixes = []
-        for prefix, version in version_pins.items():
-            if not isinstance(prefix, str) or not isinstance(version, str):
-                logger.error(f"The prefix:{prefix} and version:{version} name must both be strings")
-                invalid_prefixes.append(prefix)
-        for prefix in invalid_prefixes:
-            version_pins.pop(prefix)
-
-    if version_pins:
-        logger.debug(
-            f"These are the resource versions that are pinned.\n"
-            f"{version_pins}. "
-            f"\nPyobo will download the latest version of a resource if it's "
-            f"not pinned.\nIf you want to use a specific version of a "
-            f"resource, edit your PYOBO_VERSION_PINS environmental "
-            f"variable which is a JSON string to include a prefix and version "
-            f"name."
+        return {}
+
+    try:
+        version_pins = json.loads(version_pins_str)
+    except ValueError as e:
+        logger.error(
+            "The value for the environment variable PYOBO_VERSION_PINS "
+            "must be a valid JSON string: %s" % e
         )
+        return {}
+
+    for prefix, version in list(version_pins.items()):
+        if not isinstance(prefix, str) or not isinstance(version, str):
+            logger.error(f"The prefix:{prefix} and version:{version} name must both be strings")
+            del version_pins[prefix]
+
+    logger.debug(
+        f"These are the resource versions that are pinned.\n"
+        f"{version_pins}. "
+        f"\nPyobo will download the latest version of a resource if it's "
+        f"not pinned.\nIf you want to use a specific version of a "
+        f"resource, edit your PYOBO_VERSION_PINS environmental "
+        f"variable which is a JSON string to include a prefix and version "
+        f"name."
+    )
     return version_pins