Added delete option to database storage.

venv/Lib/site-packages/google_crc32c/__init__.py

@@ -0,0 +1,37 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import warnings
+
+_SLOW_CRC32C_WARNING = (
+    "As the c extension couldn't be imported, `google-crc32c` is using a " 
+    "pure python implementation that is significantly slower. If possible, "
+    "please configure a c build environment and compile the extension"
+)
+
+# If available, default to CFFI Implementation, otherwise, use pure python.
+try:
+    from google_crc32c import cffi as _crc32c
+    implementation = "cffi"
+except ImportError:
+    from google_crc32c import python as _crc32c
+    warnings.warn(_SLOW_CRC32C_WARNING, RuntimeWarning)
+    implementation = "python"
+
+extend = _crc32c.extend
+value = _crc32c.value
+
+Checksum = _crc32c.Checksum
+
+__all__ = ["extend", "value", "Checksum", "implementation"]