Add: function to hash dict

kheops/utils.py

@@ -4,6 +4,10 @@ import collections
 import logging
 from pathlib import Path
 
+import hashlib
+import json
+from typing import Dict, Any
+
 from jinja2 import Template
 from jsonschema import Draft7Validator, validators
 from pprint import pprint
@@ -73,6 +77,16 @@ class Default(dict):
     def __missing__(self, key):
         return ""
 
+# Source: https://www.doc.ic.ac.uk/~nuric/coding/how-to-hash-a-dictionary-in-python.html
+def dict_hash(dictionary: Dict[str, Any]) -> str:
+    """MD5 hash of a dictionary."""
+    dhash = hashlib.md5()
+    # We need to sort arguments so {'a': 1, 'b': 2} is
+    # the same as {'b': 2, 'a': 1}
+    encoded = json.dumps(dictionary, sort_keys=True).encode()
+    dhash.update(encoded)
+    return dhash.hexdigest()
+
 
 def render_template_python(text, params, ignore_missing=True):
     """Render template for a given string"""