Stop quoting TSV outputs from augur curate

CHANGES.md

@@ -10,10 +10,12 @@
 ### Bug Fixes
 
 * filter: Improve speed of checking duplicates in metadata, especially for large files. [#1466][] (@victorlin)
+* curate: Stop adding double quotes to the metadata TSV output when field values have internal quotes. [#1493][] (@joverlee521)
 
 [#1466]: https://github.com/nextstrain/augur/pull/1466
 [#1490]: https://github.com/nextstrain/augur/pull/1490
 [#1491]: https://github.com/nextstrain/augur/pull/1491
+[#1493]: https://github.com/nextstrain/augur/pull/1493
 
 ## 24.4.0 (15 May 2024)
 

augur/io/metadata.py

@@ -483,7 +483,9 @@ def write_records_to_tsv(records, output_file):
             output_columns,
             extrasaction='ignore',
             delimiter='\t',
-            lineterminator='\n'
+            lineterminator='\n',
+            quoting=csv.QUOTE_NONE,
+            quotechar=None,
         )
         tsv_writer.writeheader()
         tsv_writer.writerow(first_record)

tests/functional/curate/cram/metadata-output-with-internal-quotes.t

@@ -0,0 +1,32 @@
+Setup
+
+  $ source "$TESTDIR"/_setup.sh
+
+Testing metadata outputs with internal quotes for the curate command.
+Running the `passthru` subcommand since it does not do any data transformations.
+
+Create NDJSON with internal quotes
+
+  $ cat >records.ndjson <<~~
+  > {"strain": "sequence_A", "submitting_lab": "SRC VB \"Vector\", Molecular Biology of Genomes"}
+  > ~~
+
+Test passthru with output to TSV.
+This should not add any quotes around the field with internal quotes.
+
+  $ cat records.ndjson \
+  >   | ${AUGUR} curate passthru \
+  >     --output-metadata output-metadata.tsv
+
+  $ cat output-metadata.tsv
+  strain\tsubmitting_lab (esc)
+  sequence_A\tSRC VB "Vector", Molecular Biology of Genomes (esc)
+
+Run the output TSV through augur curate passthru again.
+The new output should still be identical to the first output.
+
+  $ ${AUGUR} curate passthru \
+  > --metadata output-metadata.tsv \
+  > --output-metadata output-metadata-2.tsv
+
+  $ diff -u output-metadata.tsv output-metadata-2.tsv

tests/io/test_metadata.py

@@ -13,7 +13,8 @@ def expected_record():
     return {
         'strain': 'SEQ_A',
         'date': '2020-10-03',
-        'country': 'USA'
+        'country': 'USA',
+        'lab': 'A Virology Lab "Vector"'
     }
 
 @pytest.fixture
@@ -36,29 +37,29 @@ class TestReadMetadataToDict:
     def test_read_table_to_dict_with_csv(self, tmpdir, expected_record):
         path = str(tmpdir / 'metadata.csv')
         with open(path, 'w') as fh:
-            fh.write('strain,date,country\n')
-            fh.write('SEQ_A,2020-10-03,USA\n')
+            fh.write('strain,date,country,lab\n')
+            fh.write('SEQ_A,2020-10-03,USA,A Virology Lab "Vector"\n')
 
         record = next(read_table_to_dict(path, (',')))
         assert record == expected_record
 
     def test_read_table_to_dict_with_csv_from_stdin(self, mp_context, expected_record):
-        stdin = StringIO('strain,date,country\nSEQ_A,2020-10-03,USA\n')
+        stdin = StringIO('strain,date,country,lab\nSEQ_A,2020-10-03,USA,A Virology Lab "Vector"\n')
         mp_context.setattr('sys.stdin', stdin)
         record = next(read_table_to_dict(sys.stdin, (',')))
         assert record == expected_record
 
     def test_read_table_to_dict_with_tsv(self, tmpdir, expected_record):
         path = str(tmpdir / 'metadata.tsv')
         with open(path, 'w') as fh:
-            fh.write('strain\tdate\tcountry\n')
-            fh.write('SEQ_A\t2020-10-03\tUSA\n')
+            fh.write('strain\tdate\tcountry\tlab\n')
+            fh.write('SEQ_A\t2020-10-03\tUSA\tA Virology Lab "Vector"\n')
 
         record = next(read_table_to_dict(path, ('\t')))
         assert record == expected_record
 
     def test_read_table_to_dict_with_tsv_from_stdin(self, mp_context, expected_record):
-        stdin = StringIO('strain\tdate\tcountry\nSEQ_A\t2020-10-03\tUSA\n')
+        stdin = StringIO('strain\tdate\tcountry\tlab\nSEQ_A\t2020-10-03\tUSA\tA Virology Lab "Vector"\n')
         mp_context.setattr('sys.stdin', stdin)
         record = next(read_table_to_dict(sys.stdin, ('\t')))
         assert record == expected_record
@@ -457,15 +458,15 @@ def test_read_metadata_with_sequences_with_extra_and_dup_warn_both(self, capsys,
 @pytest.fixture
 def output_records():
     return iter([
-        {"strain": "SEQ_A", "country": "USA", "date": "2020-10-01"},
+        {"strain": "SEQ_A", "country": "\"USA\"", "date": "2020-10-01"},
         {"strain": "SEQ_T", "country": "USA", "date": "2020-10-02"}
     ])
 
 @pytest.fixture
 def expected_output_tsv():
     return (
         "strain\tcountry\tdate\n"
-        "SEQ_A\tUSA\t2020-10-01\n"
+        'SEQ_A\t"USA"\t2020-10-01\n'
         "SEQ_T\tUSA\t2020-10-02\n"
     )
 
@@ -564,7 +565,7 @@ def test_blank_lines(self, tmpdir):
             ',,\n',
             '5,2,3\n',
         ])
-        
+
         m = Metadata(path, delimiters=',', id_columns=['a'])
         assert list(m.rows()) == [
             {'a': '1', 'b': '2', 'c': '3'},