Fix Python output for SQL tokens containing line breaks

CHANGELOG

@@ -1,7 +1,8 @@
 Development Version
 -------------------
 
-Nothing yet.
+* Escape embedded line breaks in Python output so multiline SQL strings,
+  quoted identifiers and comments produce valid Python string literals.
 
 
 Release 0.6.0 (Aug 13, 2026)

sqlparse/filters/output.py

@@ -66,7 +66,9 @@ def _process(self, stream, varname, has_nl):
             # quote cannot break out of the generated string literal
             # (GHSA-3496-9g83-7v6x).
             else:
-                token.value = token.value.replace('\\', '\\\\').replace("'", "\\'")
+                token.value = (token.value.replace('\\', '\\\\')
+                               .replace("'", "\\'")
+                               .replace('\r', '\\r').replace('\n', '\\n'))
 
             # Put the token
             yield sql.Token(T.Text, token.value)

tests/test_format.py

@@ -1,3 +1,5 @@
+import ast
+
 import pytest
 
 import sqlparse
@@ -651,6 +653,20 @@ def test_insert_values(self):
 
 
 class TestOutputFormat:
+    @pytest.mark.parametrize('line_break', ['\n', '\r', '\r\n', r'\n'])
+    @pytest.mark.parametrize('template', [
+        "SELECT 'first{}second''quote\\path'",
+        'SELECT "first{}second"',
+        'SELECT $body$first{}second$body$',
+        'SELECT 1 /* first{}second */',
+        'SELECT 1 -- first{}FROM t',
+    ])
+    def test_python_multiline_tokens(self, line_break, template):
+        sql = template.format(line_break)
+        formatted = sqlparse.format(sql, output_format='python')
+        assignment = ast.parse(formatted).body[0]
+        assert ast.literal_eval(assignment.value) == sql
+
     def test_python(self):
         sql = 'select * from foo;'
         f = lambda sql: sqlparse.format(sql, output_format='python')