draw tree of HTTPX exceptions

20-executors/getflags/httpx-error-tree/tree.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+
+import httpx  # make httpx classes available to .__subclasses__()
+
+
+def tree(cls, level=0, last_sibling=True):
+    yield cls, level, last_sibling
+    subclasses = [c for c in cls.__subclasses__()
+                  if c.__module__ == 'httpx' or c is RuntimeError]
+    if subclasses:
+        last = subclasses[-1]
+    for sub_cls in subclasses:
+        yield from tree(sub_cls, level+1, sub_cls is last)
+
+
+def display(cls):
+    for cls, level, _ in tree(cls):
+        indent = ' ' * 4 * level
+        module = 'builtins.' if cls.__module__ == 'builtins' else ''
+        print(f'{indent}{module}{cls.__name__}')
+
+
+if __name__ == '__main__':
+    display(Exception)