Print errors on stderr instead of stdout

allzweckmesser/corpus.py

@@ -3,6 +3,7 @@
 import logging
 import re
 import os.path
+import sys
 import traceback
 
 from bs4 import BeautifulSoup
@@ -122,7 +123,7 @@ def reconstruct_verse_text_from_reading(reading):
             codepoints[token.span[0]:token.span[1]] = token.text
     except Exception:
         print('ERROR reconstructing verse from reading {!r}'
-              .format(reading))
+              .format(reading), file=sys.stderr)
         traceback.print_exc()
         codepoints = []
     return ''.join(codepoints)

allzweckmesser/dev.py

@@ -4,6 +4,7 @@
 import argparse
 import json
 import random
+import sys
 import traceback
 from typing import List
 
@@ -33,7 +34,8 @@ def dev(reference_verses, number=10, randomize=False) -> List[Verse]:
             analysis = scanner.scan_verses([unidecode(ref.text)])[0]
         except Exception:
             errors += 1
-            print('ERROR at verse {}'.format(ref.text))
+            print('ERROR at verse {}'.format(ref.text),
+                  file=sys.stderr)
             traceback.print_exc()
             continue
         all_analyses.append(analysis)

scripts/extract_verses_by_meters.py

@@ -4,6 +4,7 @@
 import argparse
 import json
 import os
+import sys
 import traceback
 
 import allzweckmesser as azm
@@ -27,7 +28,8 @@ def main(hypotactic_dir, top_out_dir, meters=['hexameter']):
                               'w') as f:
                         json.dump(verses_for_meter, f)
         except Exception:
-            print('ERROR at document {}'.format(document.title))
+            print('ERROR at document {}'.format(document.title),
+                  file=sys.stdderr)
             traceback.print_exc()