diff --git a/examples/query_function.py b/examples/query_function.py
index 61aa76a4..075c2be0 100644
--- a/examples/query_function.py
+++ b/examples/query_function.py
@@ -1,6 +1,5 @@
 """ example function for osxphotos --query-function """
 
-
 from typing import List
 
 from osxphotos import PhotoInfo
@@ -13,9 +12,20 @@ def best_selfies(photos: List[PhotoInfo]) -> List[PhotoInfo]:
 
     # get list of selfies sorted by date
     photos = sorted([p for p in photos if p.selfie], key=lambda p: p.date)
+    if not photos:
+        return []
 
     start_year = photos[0].date.year
     stop_year = photos[-1].date.year
-    print(start_year, stop_year)
+    best_selfies = []
+    for year in range(start_year, stop_year + 1):
+        # find best selfie each year as determined by overall aesthetic score
+        selfies = sorted(
+            [p for p in photos if p.date.year == year],
+            key=lambda p: p.score.overall,
+            reverse=True,
+        )
+        if selfies:
+            best_selfies.append(selfies[0])
 
-    return photos
\ No newline at end of file
+    return best_selfies
diff --git a/osxphotos/_version.py b/osxphotos/_version.py
index b4a9a0c2..789e9078 100644
--- a/osxphotos/_version.py
+++ b/osxphotos/_version.py
@@ -1,3 +1,3 @@
 """ version info """
 
-__version__ = "0.42.44"
+__version__ = "0.42.45"
diff --git a/osxphotos/cli.py b/osxphotos/cli.py
index 2b0859f2..d915cd0c 100644
--- a/osxphotos/cli.py
+++ b/osxphotos/cli.py
@@ -543,6 +543,18 @@ def QUERY_OPTIONS(f):
             "CRITERIA must be a valid python expression. "
             "See https://rhettbull.github.io/osxphotos/ for additional documentation on the PhotoInfo class.",
         ),
+        o(
+            "--query-function",
+            metavar="filename.py::function",
+            multiple=True,
+            type=FunctionCall(),
+            help="Run function to filter photos. Use this in format: --query-function filename.py::function where filename.py is a python "
+            + "file you've created and function is the name of the function in the python file you want to call. "
+            + "Your function will be passed a list of PhotoInfo objects and is expected to return a filtered list of PhotoInfo objects. "
+            + "You may use more than one function by repeating the --query-function option with a different value. "
+            + "Your query function will be called after all other query options have been evaluated. "
+            + "See https://github.com/RhetTbull/osxphotos/blob/master/examples/query_function.py for example of how to use this option.",
+        ),
     ]
     for o in options[::-1]:
         f = o(f)
@@ -1141,6 +1153,7 @@ def export(
     max_size,
     regex,
     query_eval,
+    query_function,
     duplicate,
     post_command,
     post_function,
@@ -1300,6 +1313,7 @@ def export(
         max_size = cfg.max_size
         regex = cfg.regex
         query_eval = cfg.query_eval
+        query_function = cfg.query_function
         duplicate = cfg.duplicate
         post_command = cfg.post_command
         post_function = cfg.post_function
@@ -1611,6 +1625,7 @@ def export(
         max_size=max_size,
         regex=regex,
         query_eval=query_eval,
+        function=query_function,
         duplicate=duplicate,
     )
 
@@ -2013,6 +2028,7 @@ def query(
     max_size,
     regex,
     query_eval,
+    query_function,
     add_to_album,
 ):
     """Query the Photos database using 1 or more search options;
@@ -2041,6 +2057,7 @@ def query(
         label,
         is_reference,
         query_eval,
+        query_function,
         min_size,
         max_size,
         regex,
@@ -2172,6 +2189,7 @@ def query(
         min_size=min_size,
         max_size=max_size,
         query_eval=query_eval,
+        function=query_function,
         regex=regex,
         duplicate=duplicate,
     )
diff --git a/osxphotos/photosdb/photosdb.py b/osxphotos/photosdb/photosdb.py
index 28c94bff..f634a3d0 100644
--- a/osxphotos/photosdb/photosdb.py
+++ b/osxphotos/photosdb/photosdb.py
@@ -3259,6 +3259,10 @@ class PhotosDB:
         elif options.no_location:
             photos = [p for p in photos if p.location == (None, None)]
 
+        if options.function:
+            for function in options.function:
+                photos = function[0](photos)
+
         return photos
 
     def _duplicate_signature(self, uuid):
diff --git a/osxphotos/queryoptions.py b/osxphotos/queryoptions.py
index 3171d7ac..c5e85641 100644
--- a/osxphotos/queryoptions.py
+++ b/osxphotos/queryoptions.py
@@ -1,8 +1,9 @@
 """ QueryOptions class for PhotosDB.query """
 
-from dataclasses import dataclass, asdict
-from typing import Optional, Iterable, Tuple
 import datetime
+from dataclasses import asdict, dataclass
+from typing import Iterable, List, Optional, Tuple
+
 import bitmath
 
 
@@ -81,6 +82,7 @@ class QueryOptions:
     duplicate: Optional[bool] = None
     location: Optional[bool] = None
     no_location: Optional[bool] = None
+    function: Optional[List[Tuple[callable, str]]] = None
 
     def asdict(self):
         return asdict(self)
diff --git a/tests/test_cli.py b/tests/test_cli.py
index c787e42f..0698d6d8 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -6530,6 +6530,39 @@ def test_query_regex_4():
     assert len(json_got) == 2
 
 
+def test_query_function():
+    """test query --query-function"""
+    import json
+
+    from osxphotos.cli import query
+
+    runner = CliRunner()
+    cwd = os.getcwd()
+    # pylint: disable=not-context-manager
+    with runner.isolated_filesystem():
+        with open("query1.py", "w") as f:
+            f.writelines(
+                [
+                    "def query(photos):\n",
+                    "    return [p for p in photos if 'DSC03584' in p.original_filename]",
+                ]
+            )
+        tmpdir = os.getcwd()
+        result = runner.invoke(
+            query,
+            [
+                os.path.join(cwd, PHOTOS_DB_15_7),
+                "--query-function",
+                f"{tmpdir}/query1.py::query",
+                "--json",
+            ],
+        )
+        assert result.exit_code == 0
+        json_got = json.loads(result.output)
+        assert len(json_got) == 1
+        assert json_got[0]["original_filename"] == "DSC03584.dng"
+
+
 def test_export_export_dir_template():
     """Test {export_dir} template"""
     import json
@@ -6830,3 +6863,39 @@ def test_export_directory_template_function():
         )
         assert result.exit_code == 0
         assert pathlib.Path(f"foo/bar/{CLI_EXPORT_UUID_FILENAME}").is_file()
+
+
+def test_export_query_function():
+    """Test --query-function"""
+    import os.path
+
+    from osxphotos.cli import cli
+
+    runner = CliRunner()
+    cwd = os.getcwd()
+    # pylint: disable=not-context-manager
+    with runner.isolated_filesystem():
+        with open("query2.py", "w") as f:
+            f.writelines(
+                [
+                    "def query(photos):\n",
+                    "    return [p for p in photos if p.title and 'Tulips' in p.title]\n",
+                ]
+            )
+
+        tempdir = os.getcwd()
+        result = runner.invoke(
+            cli,
+            [
+                "export",
+                "--db",
+                os.path.join(cwd, PHOTOS_DB_15_7),
+                ".",
+                "--query-function",
+                f"{tempdir}/query2.py::query",
+                "-V",
+                "--skip-edited",
+            ],
+        )
+        assert result.exit_code == 0
+        assert "exported: 1" in result.output