3 files changed, 42 insertions, 0 deletions
diff --git a/basics/python/circular/a.py b/basics/python/circular/a.py
new file mode 100644
index 0000000..b32c70d
--- /dev/null
+++ b/basics/python/circular/a.py
@@ -0,0 +1,13 @@
+
+
+from typing import TYPE_CHECKING
+if TYPE_CHECKING:
+    from b import B
+
+
+class A:
+    def foo(self, b: 'B'):
+        return 2*b.foo()
+
+    def t(self):
+        print('A.t()')
diff --git a/basics/python/circular/b.py b/basics/python/circular/b.py
new file mode 100644
index 0000000..643e2f7
--- /dev/null
+++ b/basics/python/circular/b.py
@@ -0,0 +1,19 @@
+
+
+# from typing import TYPE_CHECKING
+# if TYPE_CHECKING:
+from a import A
+
+
+class B:
+
+    def __init__(self):
+        self.a_items = []
+
+    def append(self, a: 'A'):
+        a.t()
+        self.a_items.append(a)
+
+    def foo(self):
+        return 5
+
diff --git a/basics/python/circular/c.py b/basics/python/circular/c.py
new file mode 100644
index 0000000..b17402d
--- /dev/null
+++ b/basics/python/circular/c.py
@@ -0,0 +1,10 @@
+
+from b import B
+from a import A
+
+
+a_inst = A()
+b_inst = B()
+
+print(a_inst.foo(b_inst))
+b_inst.append(a_inst)