✨ Add get to mimic dict (#468)

Author: tdegeus

bibtexparser/model.py

@@ -318,6 +318,13 @@ def pop(self, key: str, default=None) -> Optional[Field]:
         self._fields = [f for f in self._fields if f.key != key]
         return field
 
+    def get(self, key: str, default=None) -> Optional[Field]:
+        """Returns the field with the given key, or the default value if it does not exist.
+
+        :param key: The key of the field.
+        :param default: The value to return if the field does not exist."""
+        return self.fields_dict.get(key, default)
+
     def __contains__(self, key: str) -> bool:
         """Dict-mimicking ``in`` operator."""
         return key in self.fields_dict

tests/test_model.py

@@ -77,6 +77,18 @@ def test_entry_deepcopy():
     assert entry_1.fields_dict["field"] == entry_2.fields_dict["field"]
 
 
+def test_entry_get():
+    entry1 = Entry(
+        "article", "key", [Field("field", "value", 1), Field("foo", "bar", 2)], 1, "raw"
+    )
+    entry2 = Entry(
+        "article", "key", [Field("field", "value", 1), Field("foo", "bar", 2)], 1, "raw"
+    )
+    assert entry1.get("other", "default") == "default"
+    assert entry1.get("foo") == Field("foo", "bar", 2)
+    assert entry1 == entry2
+
+
 def test_entry_pop():
     entry1 = Entry(
         "article", "key", [Field("field", "value", 1), Field("foo", "bar", 2)], 1, "raw"