Add --cls-file to predict command

Fixes #30

README.md

@@ -104,7 +104,7 @@ bear 1.0
 
 ## Command Line Usage
 ```
-bioclip predict [-h] [--format {table,csv}] [--output OUTPUT] [--rank {kingdom,phylum,class,order,family,genus,species}] [--k K] [--cls CLS] [--device DEVICE] image_file [image_file ...]
+bioclip predict [-h] [--format {table,csv}] [--output OUTPUT] [--rank {kingdom,phylum,class,order,family,genus,species}] [--k K] [--cls CLS | --cls-file CLS_FILE] [--device DEVICE] image_file [image_file ...]
 bioclip embed [-h] [--device=DEVICE] [--output=OUTPUT] [IMAGE_FILE...]
 
 Commands:
@@ -119,7 +119,9 @@ Options:
   --format=FORMAT      format of the output (table or csv) for predict mode [default: csv]
   --rank=RANK          rank of the classification (kingdom, phylum, class, order, family, genus, species) [default: species] 
   --k=K                number of top predictions to show [default: 5]
-  --cls=CLS            comma separated list of classes to predict, when specified the --rank and --k arguments are not allowed
+  --cls=CLS            comma separated list of classes to predict, when specified the --rank and --k 
+  arguments are not allowed
+  --cls-file CLS_FILE  path to file with list of classes to predict, one per line, when specified the --rank and --k arguments are not allowed
   --device=DEVICE      device to use matrix math (cpu or cuda or mps) [default: cpu]
   --output=OUTFILE     print output to file OUTFILE [default: stdout]
 ```

src/bioclip/__main__.py

@@ -83,7 +83,9 @@ def create_parser():
     predict_parser.add_argument('--rank', choices=['kingdom', 'phylum', 'class', 'order', 'family', 'genus', 'species'],
                                 help='rank of the classification, default: species (when)')
     predict_parser.add_argument('--k', type=int, help='number of top predictions to show, default: 5')
-    predict_parser.add_argument('--cls', help='comma separated list of classes to predict, when specified the --rank argument is not allowed')
+    cls_group = predict_parser.add_mutually_exclusive_group(required=False)
+    cls_group.add_argument('--cls', help='comma separated list of classes to predict, when specified the --rank argument is not allowed')
+    cls_group.add_argument('--cls-file', help='path to file with list of classes to predict, one per line, when specified the --rank and --k arguments are not allowed')
     predict_parser.add_argument('--device', **device_arg)
     predict_parser.add_argument('--model', **model_arg)
     predict_parser.add_argument('--pretrained', **pretrained_arg)
@@ -128,6 +130,13 @@ def parse_args(input_args=None):
     return args
 
 
+def create_classes_str(cls_file_path):
+    """Reads a file with one class per line and returns a comma separated string of classes"""
+    with open(cls_file_path, 'r') as cls_file:
+        cls_str = [item.strip() for item in cls_file.readlines()]
+    return ",".join(cls_str)
+
+
 def main():
     args = parse_args()
     if args.command == 'embed':
@@ -137,10 +146,13 @@ def main():
               model_str=args.model,
               pretrained_str=args.pretrained)
     elif args.command == 'predict':
+        cls_str = args.cls
+        if args.cls_file:
+            cls_str = create_classes_str(args.cls_file)
         predict(args.image_file,
                 format=args.format,
                 output=args.output,
-                cls_str=args.cls,
+                cls_str=cls_str,
                 rank=args.rank,
                 k=args.k,
                 device=args.device,

tests/test_main.py

@@ -1,5 +1,7 @@
 import unittest
-from bioclip.__main__ import parse_args, Rank
+from unittest.mock import mock_open, patch
+import argparse
+from bioclip.__main__ import parse_args, Rank, create_classes_str
 
 
 class TestParser(unittest.TestCase):
@@ -49,6 +51,10 @@ def test_parse_args(self):
         args = parse_args(['predict', 'image.jpg', '--cls', 'class1,class2', '--k', '10'])
         self.assertEqual(args.k, 10)
 
+        args = parse_args(['predict', '--cls-file', 'somefile.txt', 'image.jpg'])
+        self.assertEqual(args.cls_file, 'somefile.txt')
+        self.assertEqual(args.cls, None)
+
         args = parse_args(['embed', 'image.jpg'])
         self.assertEqual(args.command, 'embed')
         self.assertEqual(args.image_file, ['image.jpg'])
@@ -60,3 +66,8 @@ def test_parse_args(self):
         self.assertEqual(args.image_file, ['image.jpg', 'image2.png'])
         self.assertEqual(args.output, 'data.json')
         self.assertEqual(args.device, 'cuda')
+
+    def test_create_classes_str(self):
+        data = "class1\nclass2\nclass3"
+        with patch("builtins.open", mock_open(read_data=data)) as mock_file:
+            self.assertEqual(create_classes_str('path/to/file'), 'class1,class2,class3')