don't bork on typing_extensions.Literal (#527)

mitmproxy · Mar 31, 2023 · bf3fe14 · bf3fe14
1 parent 1c422df
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -10,6 +10,8 @@
    ([#521](https://github.com/mitmproxy/pdoc/pull/521), @mikkelakromann)
  - Fix a crash in pdoc 13.0.0 when `__init__.py` is passed as a file to pdoc.
    ([#522](https://github.com/mitmproxy/pdoc/pull/522), @mhils)
+ - Add rudimentary support for `typing_extensions.Literal` on Python 3.7.
+   ([#527](https://github.com/mitmproxy/pdoc/pull/527), @mhils)
 
 ## 2023-02-19: pdoc 13.0.0
 

diff --git a/pdoc/_compat.py b/pdoc/_compat.py
@@ -109,8 +109,11 @@ def __get__(self, instance, owner=None):
 
     # There is no Literal on 3.7, so we just make one up. It should not be used anyways!
 
-    class Literal:
-        pass
+    try:
+        from typing_extensions import Literal
+    except ImportError:
+        class Literal:
+            pass
 
     # get_origin is adapted from
     # https://github.com/python/cpython/blob/863eb7170b3017399fb2b786a1e3feb6457e54c2/Lib/typing.py#L1474-L1515