Improve output handling in evaluate

spacy/cli/evaluate.py

@@ -2,6 +2,8 @@ from typing import Optional, List
 from timeit import default_timer as timer
 from wasabi import Printer
 from pathlib import Path
+import re
+import srsly
 
 from ..gold import Corpus
 from ..tokens import Doc
@@ -16,13 +18,12 @@ def evaluate_cli(
     # fmt: off
     model: str = Arg(..., help="Model name or path"),
     data_path: Path = Arg(..., help="Location of JSON-formatted evaluation data", exists=True),
+    output: Optional[Path] = Opt(None, "--output", "-o", help="Output JSON file for metrics", dir_okay=False),
     gpu_id: int = Opt(-1, "--gpu-id", "-g", help="Use GPU"),
     gold_preproc: bool = Opt(False, "--gold-preproc", "-G", help="Use gold preprocessing"),
     displacy_path: Optional[Path] = Opt(None, "--displacy-path", "-dp", help="Directory to output rendered parses as HTML", exists=True, file_okay=False),
     displacy_limit: int = Opt(25, "--displacy-limit", "-dl", help="Limit of parses to render as HTML"),
-    return_scores: bool = Opt(False, "--return-scores", "-R", help="Return dict containing model scores"),
-
-        # fmt: on
+    # fmt: on
 ):
     """
     Evaluate a model. To render a sample of parses in a HTML file, set an
@@ -31,24 +32,24 @@ def evaluate_cli(
     evaluate(
         model,
         data_path,
+        output=output,
         gpu_id=gpu_id,
         gold_preproc=gold_preproc,
         displacy_path=displacy_path,
         displacy_limit=displacy_limit,
         silent=False,
-        return_scores=return_scores,
     )
 
 
 def evaluate(
     model: str,
     data_path: Path,
+    output: Optional[Path],
     gpu_id: int = -1,
     gold_preproc: bool = False,
     displacy_path: Optional[Path] = None,
     displacy_limit: int = 25,
     silent: bool = True,
-    return_scores: bool = False,
 ) -> Scorer:
     msg = Printer(no_print=silent, pretty=not silent)
     util.fix_random_seed()
@@ -56,6 +57,7 @@ def evaluate(
         util.use_gpu(gpu_id)
     util.set_env_log(False)
     data_path = util.ensure_path(data_path)
+    output_path = util.ensure_path(output)
     displacy_path = util.ensure_path(displacy_path)
     if not data_path.exists():
         msg.fail("Evaluation data not found", data_path, exits=1)
@@ -105,8 +107,11 @@ def evaluate(
             ents=render_ents,
         )
         msg.good(f"Generated {displacy_limit} parses as HTML", displacy_path)
-    if return_scores:
-        return scorer.scores
+
+    data = {re.sub(r"[\s/]", "_", k.lower()): v for k, v in results.items()}
+    if output_path is not None:
+        srsly.write_json(output_path, data)
+    return data
 
 
 def render_parses(