Removed pyhash dependency (#2170)

* Removed problematic pyhash dependency

* Added CHANGELOG

CHANGELOG.md

@@ -30,6 +30,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed multiple errors which arises when polygon is of length 5 or less (<https://github.com/opencv/cvat/pull/2100>)
 - Fixed task creation from PDF (<https://github.com/opencv/cvat/pull/2141>)
 - Fixed CVAT format import for frame stepped tasks (<https://github.com/openvinotoolkit/cvat/pull/2151>)
+- Fixed unnecessary pyhash dependency (<https://github.com/openvinotoolkit/cvat/pull/2170>)
 
 ### Security
 -

cvat/apps/dataset_manager/formats/utils.py

@@ -3,11 +3,10 @@
 # SPDX-License-Identifier: MIT
 
 import os.path as osp
-from pyhash import murmur3_32
+from hashlib import blake2s
 
 from datumaro.cli.util import make_file_name
 
-hasher = murmur3_32()
 
 def get_color_from_index(index):
     def get_bit(number, index):
@@ -69,7 +68,8 @@ def get_label_color(label_name, label_names):
     normalized_name = normalize_label(label_name)
 
     color = predefined.get(normalized_name, None)
-    offset = hasher(normalized_name) + normalized_names.count(normalized_name)
+    name_hash = int.from_bytes(blake2s(normalized_name.encode(), digest_size=4).digest(), byteorder="big")
+    offset = name_hash + normalized_names.count(normalized_name)
 
     if color is None:
         color = get_color_from_index(DEFAULT_COLORMAP_CAPACITY + offset)

cvat/requirements/base.txt

@@ -10,7 +10,6 @@ Pillow==7.2.0
 numpy==1.18.5
 python-ldap==3.3.1
 pytz==2020.1
-pyhash==0.9.3
 pyunpack==0.2.1
 rcssmin==1.0.6
 redis==3.5.3