import only for type check, Makefile pre-commit

Makefile

@@ -14,6 +14,7 @@ help: ## Print this message
 ### Dependency commands ###
 install: ## Install dependencies
 	pipenv install --dev
+	pipenv run pre-commit install
 
 update: install # update all Python dependencies
 	pipenv clean

lambdas/alma_prep.py

@@ -2,19 +2,21 @@
 import os
 import tarfile
 from collections.abc import Generator
-from typing import IO
+from typing import IO, TYPE_CHECKING
 
 import boto3
 import smart_open  # type: ignore[import]
-from mypy_boto3_s3.client import S3Client
+
+if TYPE_CHECKING:
+    from mypy_boto3_s3.client import S3Client  # pragma: no cover
 
 from lambdas import helpers
 
 logger = logging.getLogger(__name__)
 
 
 def extract_file_from_source_bucket_to_target_bucket(
-    s3_client: S3Client,
+    s3_client: "S3Client",
     source_bucket: str,
     source_file_key: str,
     target_bucket: str,