Merge pull request #1074 from serengil/feat-task-0803-hash-approach

hash with properties instead of file itself

deepface/commons/package_utils.py

@@ -1,4 +1,5 @@
 # built-in dependencies
+import os
 import hashlib
 
 # 3rd party dependencies
@@ -21,12 +22,22 @@ def get_tf_major_version() -> int:
 
 def find_hash_of_file(file_path: str) -> str:
     """
-    Find hash of image file
+    Find the hash of given image file with its properties
+        finding the hash of image content is costly operation
     Args:
         file_path (str): exact image path
     Returns:
         hash (str): digest with sha1 algorithm
     """
-    with open(file_path, "rb") as f:
-        digest = hashlib.sha1(f.read()).hexdigest()
-    return digest
+    file_stats = os.stat(file_path)
+
+    # some properties
+    file_size = file_stats.st_size
+    creation_time = file_stats.st_ctime
+    modification_time = file_stats.st_mtime
+
+    properties = f"{file_size}-{creation_time}-{modification_time}"
+
+    hasher = hashlib.sha1()
+    hasher.update(properties.encode("utf-8"))
+    return hasher.hexdigest()

deepface/modules/demography.py

@@ -96,7 +96,7 @@ def analyze(
                - 'white': Confidence score for White ethnicity.
     """
 
-    # validate actions
+    # if actions is passed as tuple with single item, interestingly it becomes str here
     if isinstance(actions, str):
         actions = (actions,)