File Update Overwrite Flag

.gitignore

@@ -4,6 +4,7 @@
 .vs/PythonSettings.json
 .vs/VSWorkspaceState.json
 
+*.pyc
 .idea/
 
 sdk/diffgram/__pycache__/

sdk/diffgram/core/core.py

@@ -240,7 +240,6 @@ def set_default_directory(self,
 			self.directory_id = self.default_directory['id']
 
 			self.directory_list = data["directory_list"]
-
 		self.session.headers.update(
 			{'directory_id': str(self.directory_id)})
 

sdk/diffgram/core/diffgram_dataset_iterator.py

@@ -0,0 +1,137 @@
+from PIL import Image, ImageDraw
+from imageio import imread
+import numpy as np
+
+class DiffgramDatasetIterator:
+
+    def __init__(self, project, diffgram_file_id_list):
+        """
+
+        :param project (sdk.core.core.Project): A Project object from the Diffgram SDK
+        :param diffgram_file_list (list): An arbitrary number of file ID's from Diffgram.
+        """
+        self.diffgram_file_id_list = diffgram_file_id_list
+
+        self.project = project
+        self._internal_file_list = []
+        self.__validate_file_ids()
+        self.current_file_index = 0
+
+    def __iter__(self):
+        self.current_file_index = 0
+        return self
+
+    def __len__(self):
+        return len(self.diffgram_file_id_list)
+
+    def __getitem__(self, idx):
+        diffgram_file = self.project.file.get_by_id(self.diffgram_file_id_list[idx], with_instances = True)
+        instance_data = self.get_file_instances(diffgram_file)
+        return instance_data
+
+    def __next__(self):
+        file_id = self.diffgram_file_id_list[self.current_file_index]
+        diffgram_file = self.project.file.get_by_id(file_id, with_instances = True)
+        instance_data = self.get_file_instances(diffgram_file)
+        self.current_file_index += 1
+        return instance_data
+
+    def __validate_file_ids(self):
+        result = self.project.file.file_list_exists(self.diffgram_file_id_list)
+        if not result:
+            raise Exception(
+                'Some file IDs do not belong to the project. Please provide only files from the same project.')
+
+    def get_image_data(self, diffgram_file):
+        if hasattr(diffgram_file, 'image'):
+            image = imread(diffgram_file.image.get('url_signed'))
+            return image
+        else:
+            raise Exception('Pytorch datasets only support images. Please provide only file_ids from images')
+
+    def get_file_instances(self, diffgram_file):
+        if diffgram_file.type not in ['image', 'frame']:
+            raise NotImplementedError('File type "{}" is not supported yet'.format(diffgram_file['type']))
+
+        image = self.get_image_data(diffgram_file)
+        instance_list = diffgram_file.instance_list
+        instance_types_in_file = set([x['type'] for x in instance_list])
+        # Process the instances of each file
+        sample = {'image': image, 'diffgram_file': diffgram_file}
+        has_boxes = False
+        has_poly = False
+        if 'box' in instance_types_in_file:
+            has_boxes = True
+            x_min_list, x_max_list, y_min_list, y_max_list = self.extract_bbox_values(instance_list, diffgram_file)
+            sample['x_min_list'] = x_min_list
+            sample['x_max_list'] = x_max_list
+            sample['y_min_list'] = y_min_list
+            sample['y_max_list'] = y_max_list
+
+        if 'polygon' in instance_types_in_file:
+            has_poly = True
+            mask_list = self.extract_masks_from_polygon(instance_list, diffgram_file)
+            sample['polygon_mask_list'] = mask_list
+
+        if len(instance_types_in_file) > 2 and has_boxes and has_boxes:
+            raise NotImplementedError(
+                'SDK only supports boxes and polygon types currently. If you want a new instance type to be supported please contact us!'
+            )
+
+        label_id_list, label_name_list = self.extract_labels(instance_list)
+        sample['label_id_list'] = label_id_list
+        sample['label_name_list'] = label_name_list
+
+        return sample
+
+    def extract_masks_from_polygon(self, instance_list, diffgram_file, empty_value = 0):
+        nx, ny = diffgram_file.image['width'], diffgram_file.image['height']
+        mask_list = []
+        for instance in instance_list:
+            if instance['type'] != 'polygon':
+                continue
+            poly = [(p['x'], p['y']) for p in instance['points']]
+
+            img = Image.new(mode = 'L', size = (nx, ny), color = 0)  # mode L = 8-bit pixels, black and white
+            draw = ImageDraw.Draw(img)
+            draw.polygon(poly, outline = 1, fill = 1)
+            mask = np.array(img).astype('float32')
+            # mask[np.where(mask == 0)] = empty_value
+            mask_list.append(mask)
+        return mask_list
+
+    def extract_labels(self, instance_list, allowed_instance_types = None):
+        label_file_id_list = []
+        label_names_list = []
+
+        for inst in instance_list:
+            if allowed_instance_types and inst['type'] in allowed_instance_types:
+                continue
+
+            label_file_id_list.append(inst['label_file']['id'])
+            label_names_list.append(inst['label_file']['label']['name'])
+
+        return label_file_id_list, label_names_list
+
+    def extract_bbox_values(self, instance_list, diffgram_file):
+        """
+            Creates a pytorch tensor based on the instance type.
+            For now we are assuming shapes here, but we can extend it
+            to accept custom shapes specified by the user.
+        :param instance:
+        :return:
+        """
+        x_min_list = []
+        x_max_list = []
+        y_min_list = []
+        y_max_list = []
+
+        for inst in instance_list:
+            if inst['type'] != 'box':
+                continue
+            x_min_list.append(inst['x_min'] / diffgram_file.image['width'])
+            x_max_list.append(inst['x_max'] / diffgram_file.image['width'])
+            y_min_list.append(inst['y_min'] / diffgram_file.image['width'])
+            y_max_list.append(inst['y_max'] / diffgram_file.image['width'])
+
+        return x_min_list, x_max_list, y_min_list, y_max_list

sdk/diffgram/core/directory.py

@@ -1,6 +1,9 @@
 from diffgram.file.file import File
 from ..regular.regular import refresh_from_dict
 import logging
+from diffgram.pytorch_diffgram.diffgram_pytorch_dataset import DiffgramPytorchDataset
+from diffgram.tensorflow_diffgram.diffgram_tensorflow_dataset import DiffgramTensorflowDataset
+from diffgram.core.diffgram_dataset_iterator import DiffgramDatasetIterator
 
 
 def get_directory_list(self):
@@ -71,14 +74,80 @@ def set_directory_by_name(self, name):
 				  str(names_attempted))
 
 
-class Directory():
+class Directory(DiffgramDatasetIterator):
 
-	def __init__(self,
-			     client):
+	def __init__(self, client, file_id_list_sliced = None):
 
 		self.client = client
 		self.id = None
+		self.file_list_metadata = {}
 
+		if file_id_list_sliced is None:
+			self.file_id_list = self.all_file_ids()
+		else:
+			self.file_id_list = file_id_list_sliced
+		super(Directory, self).__init__(self.client, self.file_id_list)
+
+	def all_files(self):
+		"""
+			Get all the files of the directoy.
+			Warning! This can be an expensive function and take a long time.
+		:return:
+		"""
+		page_num = 1
+		result = []
+		while page_num is not None:
+			diffgram_files = self.list_files(limit = 1000, page_num = page_num, file_view_mode = 'base')
+			page_num = self.file_list_metadata['next_page']
+			result = result + diffgram_files
+		return result
+
+	def all_file_ids(self):
+		page_num = 1
+		result = []
+		while page_num is not None:
+			diffgram_ids = self.list_files(limit = 1000, page_num = page_num, file_view_mode = 'ids_only')
+			page_num = self.file_list_metadata['next_page']
+			result = result + diffgram_ids
+		return result
+
+	def slice(self, query):
+		from diffgram.core.sliced_directory import SlicedDirectory
+		# Get the first page to validate syntax.
+		self.list_files(
+			limit = 25,
+			page_num = 1,
+			file_view_mode = 'ids_only',
+			query = query,
+		)
+		sliced_dataset = SlicedDirectory(
+			client = self.client,
+			query = query,
+			original_directory = self
+		)
+		return sliced_dataset
+
+	def to_pytorch(self, transform = None):
+		"""
+			Transforms the file list inside the dataset into a pytorch dataset.
+		:return:
+		"""
+		file_id_list = self.all_file_ids()
+		pytorch_dataset = DiffgramPytorchDataset(
+			project = self.client,
+			diffgram_file_id_list = file_id_list,
+			transform = transform
+
+		)
+		return pytorch_dataset
+
+	def to_tensorflow(self):
+		file_id_list = self.all_file_ids()
+		diffgram_tensorflow_dataset = DiffgramTensorflowDataset(
+			project = self.client,
+			diffgram_file_id_list = file_id_list
+		)
+		return diffgram_tensorflow_dataset
 
 	def new(self, name: str):
 		"""
@@ -131,9 +200,12 @@ def new(self, name: str):
 
 
 	def list_files(
-			self, 
-			limit=None,
-			search_term: str =None):
+			self,
+			page_num=1,
+			limit=100,
+			search_term: str =None,
+			file_view_mode: str = 'annotation',
+			query: str = None):
 		"""
 		Get a list of files in directory (from Diffgram service). 
 
@@ -158,7 +230,6 @@ def list_files(
 		else:
 			logging.info("Using Default Dataset ID " + str(self.client.directory_id))
 			directory_id = self.client.directory_id
-		#print("directory_id", directory_id)
 
 		metadata = {'metadata' :
 			{
@@ -167,10 +238,10 @@ def list_files(
 				'annotation_status': "All",
 				'limit': limit,
 				'media_type': "All",
-				'request_next_page': False,
-				'request_previous_page': False,
-				'file_view_mode': "annotation",
-				'search_term': search_term
+				'page': page_num,
+				'file_view_mode': file_view_mode,
+				'search_term': search_term,
+				'query': query
 			}
 		}
 
@@ -190,17 +261,20 @@ def list_files(
 		# Success
 		data = response.json()
 		file_list_json = data.get('file_list')
-
+		self.file_list_metadata = data.get('metadata')
 		# TODO would like this to perhaps be a seperate function
 		# ie part of File_Constructor perhaps
-		file_list = []
-		for file_json in file_list_json:
-			file = File.new(
-				client = self.client,
-				file_json = file_json)
-			file_list.append(file)
-
-		return file_list
+		if file_view_mode == 'ids_only':
+			return file_list_json
+		else:
+			file_list = []
+			for file_json in file_list_json:
+				file = File.new(
+					client = self.client,
+					file_json = file_json)
+				file_list.append(file)
+
+			return file_list
 
 
 	def get(self, 

sdk/diffgram/core/sliced_directory.py

@@ -0,0 +1,49 @@
+from diffgram.core.directory import Directory
+from diffgram.pytorch_diffgram.diffgram_pytorch_dataset import DiffgramPytorchDataset
+from diffgram.tensorflow_diffgram.diffgram_tensorflow_dataset import DiffgramTensorflowDataset
+
+
+class SlicedDirectory(Directory):
+
+    def __init__(self, client, original_directory: Directory, query: str):
+        self.original_directory = original_directory
+        self.query = query
+        self.client = client
+        # Share the same ID from the original directory as this is just an in-memory construct for better semantics.
+        self.id = original_directory.id
+        self.file_id_list = self.all_file_ids()
+        super(Directory, self).__init__(self.client, self.file_id_list)
+
+    def all_file_ids(self):
+        page_num = 1
+        result = []
+        while page_num is not None:
+            diffgram_files = self.list_files(limit = 1000,
+                                             page_num = page_num,
+                                             file_view_mode = 'ids_only',
+                                             query = self.query)
+            page_num = self.file_list_metadata['next_page']
+            result = result + diffgram_files
+        return result
+
+    def to_pytorch(self, transform = None):
+        """
+            Transforms the file list inside the dataset into a pytorch dataset.
+        :return:
+        """
+
+        pytorch_dataset = DiffgramPytorchDataset(
+            project = self.client,
+            diffgram_file_id_list = self.file_id_list,
+            transform = transform
+
+        )
+        return pytorch_dataset
+
+    def to_tensorflow(self):
+        file_id_list = self.all_file_ids()
+        diffgram_tensorflow_dataset = DiffgramTensorflowDataset(
+            project = self.client,
+            diffgram_file_id_list = file_id_list
+        )
+        return diffgram_tensorflow_dataset

sdk/diffgram/file/file.py

@@ -1,6 +1,5 @@
 from ..regular.regular import refresh_from_dict
 
-
 class File():
     """
     file literal object
@@ -11,11 +10,12 @@ class File():
 
     def __init__(
             self,
-            id=None,
-            client=None):
+            id = None,
+            client = None):
         self.id = id
         self.client = client
 
+    @staticmethod
     def new(
             client,
             file_json):
@@ -62,7 +62,8 @@ def update(
         packet['instance_list'] = instance_list
 
         # Current default server side is to not overwrite
-        # packet['overwrite'] = overwrite
+        if overwrite:
+            packet['mode'] = "update_with_existing"
 
         self.client.file.from_packet(packet=packet)