allow missing fields

Oeiginal fix from #33

src/spacy_conll/formatter.py

@@ -35,8 +35,8 @@
     },
 )
 def create_conll_formatter(
-    nlp: Language,
-    name: str,
+    nlp: Language,  # qa: ignore
+    name: str,  # qa: ignore
     conversion_maps: Optional[Dict[str, Dict[str, str]]] = None,
     ext_names: Optional[Dict[str, str]] = None,
     field_names: Dict[str, str] = None,
@@ -200,12 +200,12 @@ def _set_token_conll(self, token: Token, token_idx: int = 1) -> Token:
         token_conll = (
             token_idx,
             token.text,
-            token.lemma_,
-            token.pos_,
-            token.tag_,
+            token.lemma_ if token.lemma_ else "_",
+            token.pos_ if token.pos_ else "_",
+            token.tag_ if token.tag_ else "_",
             str(token.morph) if token.has_morph and str(token.morph) else "_",
             head_idx,
-            token.dep_,
+            token.dep_ if token.dep_ else "_",
             token._.conll_deps_graphs_field,
             token._.conll_misc_field,
         )

tests/conftest.py

@@ -1,6 +1,8 @@
 from pathlib import Path
 
 import pytest
+from spacy import Vocab
+from spacy.tokens import Doc, Token
 from spacy.tokens.underscore import Underscore
 from spacy_conll import init_parser
 
@@ -156,3 +158,26 @@ def conllparser_parse_conllfile(spacy_vanila):
     return ConllParser(spacy_vanila).parse_conll_as_spacy(
         Path(__file__).parent.joinpath("en_ewt-ud-dev.conllu-sample.txt"), input_encoding="utf-8"
     )
+
+
+@pytest.fixture
+def spacy_vocab():
+    return Vocab(strings=["hello", "world"])
+
+
+@pytest.fixture
+def spacy_doc(spacy_vocab):
+    words = ["hello", "world", "!"]
+    spaces = [True, False, False]
+    sent_starts = [True, False, False]
+    return Doc(
+        spacy_vocab,
+        words=words,
+        spaces=spaces,
+        sent_starts=sent_starts,
+    )
+
+
+@pytest.fixture
+def spacy_token(spacy_vocab, spacy_doc):
+    return Token(spacy_vocab, spacy_doc, 1)

tests/test_formatter.py

@@ -0,0 +1,26 @@
+from collections import OrderedDict
+
+from spacy.tokens import Token
+from spacy_conll.formatter import ConllFormatter
+
+
+def test_set_token_conll(spacy_token: Token):
+    """Test for https://github.com/BramVanroy/spacy_conll/issues/29"""
+    formatter = ConllFormatter()
+    assert formatter._set_token_conll(spacy_token)._.get("conll") == OrderedDict(
+        [
+            ("ID", 1),
+            ("FORM", "world"),
+            ("LEMMA", "_"),
+            ("UPOS", "_"),
+            ("XPOS", "_"),
+            ("FEATS", "_"),
+            ("HEAD", 2),
+            ("DEPREL", "_"),
+            ("DEPS", "_"),
+            ("MISC", "SpaceAfter=No"),
+        ]
+    )
+    assert (
+        formatter._set_token_conll(spacy_token)._.get("conll_str") == "1\tworld\t_\t_\t_\t_\t2\t_\t_\tSpaceAfter=No\n"
+    )