Provide err msg empty file location (#120)

* added exception for empty file list

* added batching, randomness and multiple file extensions to find_files

* added more default filetypes to find_files

* changed summmary.py logic (#121)

* changed summmary.py logic

* fixing test_summary

* added macos for testing

* fixed_display_test

* fixed docs and exceptions

* added dropout menu for summary

* added new SummaryDetector to AnalysisExplorer

* bug fixing

* code improving

* fixed test_display

* fixed code smells

* reduce tests for macos

* added some tests and exceptions for summary init

* changed CI, runs pytest independently

* exclude test_analysisExplorer from macos in CI

* moved some tests from test_init_summary to test_advanced_init_summary and mark them as long

---------

Co-authored-by: Inga Ulusoy <inga.ulusoy@uni-heidelberg.de>

* fixing coverage report (#126)

* fixed coverage report

---------

Co-authored-by: Petr Andriushchenko <pitandmind@gmail.com>
Co-authored-by: Inga Ulusoy <inga.ulusoy@uni-heidelberg.de>

ammico/test/test_utils.py

@@ -1,11 +1,76 @@
 import json
 import pandas as pd
 import ammico.utils as ut
+import pytest
+import os
 
 
 def test_find_files(get_path):
-    result = ut.find_files(path=get_path, pattern="*.png", recursive=True, limit=10)
-    assert len(result) > 0
+    with pytest.raises(FileNotFoundError):
+        ut.find_files(path=".", pattern="*.png")
+
+    result_jpg = ut.find_files(path=get_path, pattern=".jpg", recursive=True, limit=10)
+    assert 0 < len(result_jpg) <= 10
+
+    result_png = ut.find_files(path=get_path, pattern=".png", recursive=True, limit=10)
+    assert 0 < len(result_png) <= 10
+
+    result_png_jpg = ut.find_files(
+        path=get_path, pattern=["png", "jpg"], recursive=True, limit=10
+    )
+    assert 0 < len(result_png_jpg) <= 10
+
+    result_png_jpg = ut.find_files(
+        path=get_path, pattern=["png", "jpg"], recursive=True, limit=4
+    )
+    assert 0 < len(result_png_jpg) <= 4
+
+    result_png_jpg = ut.find_files(
+        path=get_path, pattern=["png", "jpg"], recursive=True, limit=[2, 4]
+    )
+    assert 0 < len(result_png_jpg) <= 2
+
+    one_dir_up_path = os.path.join(get_path, "..")
+    with pytest.raises(FileNotFoundError):
+        ut.find_files(
+            path=one_dir_up_path, pattern=["png", "jpg"], recursive=False, limit=[2, 4]
+        )
+
+    result_png_jpg = ut.find_files(
+        path=one_dir_up_path, pattern=["png", "jpg"], recursive=True, limit=[2, 4]
+    )
+    assert 0 < len(result_png_jpg) <= 2
+
+    result_png_jpg = ut.find_files(
+        path=get_path, pattern=["png", "jpg"], recursive=True, limit=None
+    )
+    assert 0 < len(result_png_jpg)
+    result_png_jpg = ut.find_files(
+        path=get_path, pattern=["png", "jpg"], recursive=True, limit=-1
+    )
+    assert 0 < len(result_png_jpg)
+
+    result_png_jpg_rdm1 = ut.find_files(
+        path=get_path, pattern=["png", "jpg"], recursive=True, limit=10, random_seed=1
+    )
+    result_png_jpg_rdm2 = ut.find_files(
+        path=get_path, pattern=["png", "jpg"], recursive=True, limit=10, random_seed=2
+    )
+    assert result_png_jpg_rdm1 != result_png_jpg_rdm2
+    assert len(result_png_jpg_rdm1) == len(result_png_jpg_rdm2)
+
+    with pytest.raises(ValueError):
+        ut.find_files(path=get_path, pattern=["png", "jpg"], recursive=True, limit=-2)
+    with pytest.raises(ValueError):
+        ut.find_files(
+            path=get_path, pattern=["png", "jpg"], recursive=True, limit=[2, 4, 5]
+        )
+    with pytest.raises(ValueError):
+        ut.find_files(path=get_path, pattern=["png", "jpg"], recursive=True, limit=[2])
+    with pytest.raises(ValueError):
+        ut.find_files(
+            path=get_path, pattern=["png", "jpg"], recursive=True, limit="limit"
+        )
 
 
 def test_initialize_dict(get_path):

ammico/utils.py

@@ -3,11 +3,17 @@ import os
 from pandas import DataFrame, read_csv
 import pooch
 import importlib_resources
+import collections
+import random
 
 
 pkg = importlib_resources.files("ammico")
 
 
+def iterable(arg):
+    return isinstance(arg, collections.abc.Iterable) and not isinstance(arg, str)
+
+
 class DownloadResource:
     """A remote resource that needs on demand downloading.
 
@@ -48,8 +54,52 @@ class AnalysisMethod:
         raise NotImplementedError()
 
 
+def _match_pattern(path, pattern, recursive):
+    # helper function for find_files
+    # find all matches for a single pattern.
+
+    if pattern.startswith("."):
+        pattern = pattern[1:]
+    if recursive:
+        search_path = f"{path}/**/*.{pattern}"
+    else:
+        search_path = f"{path}/*.{pattern}"
+    return list(glob.glob(search_path, recursive=recursive))
+
+
+def _limit_results(results, limit):
+    # helper function for find_files
+    # use -1 or None to return all images
+    if limit == -1 or limit is None:
+        limit = len(results)
+
+    # limit or batch the images
+    if isinstance(limit, int):
+        if limit < -1:
+            raise ValueError("limit must be an integer greater than 0 or equal to -1")
+        results = results[:limit]
+
+    elif iterable(limit):
+        if len(limit) == 2:
+            results = results[limit[0] : limit[1]]
+        else:
+            raise ValueError(
+                f"limit must be an integer or a tuple of length 2, but is {limit}"
+            )
+    else:
+        raise ValueError(
+            f"limit must be an integer or a tuple of length 2, but is {limit}"
+        )
+
+    return results
+
+
 def find_files(
-    path: str = None, pattern: str = "*.png", recursive: bool = True, limit: int = 20
+    path: str = None,
+    pattern=["png", "jpg", "jpeg", "gif", "webp", "avif", "tiff"],
+    recursive: bool = True,
+    limit=20,
+    random_seed: int = None,
 ) -> list:
     """Find image files on the file system.
 
@@ -57,22 +107,37 @@ def find_files(
         path (str, optional): The base directory where we are looking for the images. Defaults
             to None, which uses the XDG data directory if set or the current
             working directory otherwise.
-        pattern (str, optional): The naming pattern that the filename should match. Defaults to
-            "*.png". Can be used to allow other patterns or to only include
+        pattern (str|list, optional): The naming pattern that the filename should match.
+                Use either '.ext' or just 'ext'
+                Defaults to ["png", "jpg", "jpeg", "gif", "webp", "avif","tiff"]. Can be used to allow other patterns or to only include
                 specific prefixes or suffixes.
-        recursive (bool, optional): Whether to recurse into subdirectories. Default is set to False.
-        limit (int, optional): The maximum number of images to be found.
-            Defaults to 20. To return all images, set to None.
-
+        recursive (bool, optional): Whether to recurse into subdirectories. Default is set to True.
+        limit (int/list, optional): The maximum number of images to be found.
+            Provide a list or tuple of length 2 to batch the images.
+            Defaults to 20. To return all images, set to None or -1.
+        random_seed (int, optional): The random seed to use for shuffling the images.
+            If None is provided the data will not be shuffeled. Defaults to None.
     Returns:
         list: A list with all filenames including the path.
     """
+
     if path is None:
         path = os.environ.get("XDG_DATA_HOME", ".")
-    result = list(glob.glob(f"{path}/{pattern}", recursive=recursive))
-    if limit is not None:
-        result = result[:limit]
-    return result
+
+    if isinstance(pattern, str):
+        pattern = [pattern]
+    results = []
+    for p in pattern:
+        results.extend(_match_pattern(path, p, recursive=recursive))
+
+    if len(results) == 0:
+        raise FileNotFoundError(f"No files found in {path} with pattern '{pattern}'")
+
+    if random_seed is not None:
+        random.seed(random_seed)
+        random.shuffle(results)
+
+    return _limit_results(results, limit)
 
 
 def initialize_dict(filelist: list) -> dict: