bpo-36878: Allow extra text after `# type: ignore` comments (GH-13238)
In the parser, when using the type_comments=True option, recognize
a TYPE_IGNORE as anything containing `# type: ignore` followed by
a non-alphanumeric character. This is to allow ignores such as
`# type: ignore[E1000]`.
diff --git a/Lib/test/test_type_comments.py b/Lib/test/test_type_comments.py
index 69a48a1..b431890 100644
--- a/Lib/test/test_type_comments.py
+++ b/Lib/test/test_type_comments.py
@@ -76,6 +76,12 @@
def bar():
x = 1 # type: ignore
+
+def baz():
+ pass # type: ignore[excuse]
+ pass # type: ignore=excuse
+ pass # type: ignore [excuse]
+ x = 1 # type: ignore whatever
"""
# Test for long-form type-comments in arguments. A test function
@@ -266,7 +272,7 @@
def test_ignores(self):
for tree in self.parse_all(ignores):
- self.assertEqual([ti.lineno for ti in tree.type_ignores], [2, 5])
+ self.assertEqual([ti.lineno for ti in tree.type_ignores], [2, 5, 8, 9, 10, 11])
tree = self.classic_parse(ignores)
self.assertEqual(tree.type_ignores, [])
@@ -318,6 +324,7 @@
check_both_ways("while True:\n continue # type: int\n")
check_both_ways("try: # type: int\n pass\nfinally:\n pass\n")
check_both_ways("try:\n pass\nfinally: # type: int\n pass\n")
+ check_both_ways("pass # type: ignorewhatever\n")
def test_func_type_input(self):
diff --git a/Misc/NEWS.d/next/Library/2019-05-10-22-00-06.bpo-36878.iigeqk.rst b/Misc/NEWS.d/next/Library/2019-05-10-22-00-06.bpo-36878.iigeqk.rst
new file mode 100644
index 0000000..20b44dc
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2019-05-10-22-00-06.bpo-36878.iigeqk.rst
@@ -0,0 +1,4 @@
+When using `type_comments=True` in `ast.parse`, treat `# type: ignore` followed by
+a non-alphanumeric character and then arbitrary text as a type ignore, instead of
+requiring nothing but whitespace or another comment. This is to permit formations
+such as `# type: ignore[E1000]`.
\ No newline at end of file
diff --git a/Parser/tokenizer.c b/Parser/tokenizer.c
index e8068f2..5dc2ae6 100644
--- a/Parser/tokenizer.c
+++ b/Parser/tokenizer.c
@@ -1272,14 +1272,11 @@
type_start = p;
- is_type_ignore = tok->cur >= p + 6 && memcmp(p, "ignore", 6) == 0;
- p += 6;
- while (is_type_ignore && p < tok->cur) {
- if (*p == '#')
- break;
- is_type_ignore = is_type_ignore && (*p == ' ' || *p == '\t');
- p++;
- }
+ /* A TYPE_IGNORE is "type: ignore" followed by the end of the token
+ * or anything non-alphanumeric. */
+ is_type_ignore = (
+ tok->cur >= p + 6 && memcmp(p, "ignore", 6) == 0
+ && !(tok->cur > p + 6 && isalnum(p[6])));
if (is_type_ignore) {
/* If this type ignore is the only thing on the line, consume the newline also. */