From 0527c4eae62a0aa22e4557353990ecce44c54a58 Mon Sep 17 00:00:00 2001
From: Moreal <dev.moreal@gmail.com>
Date: Sun, 22 Jan 2023 17:11:21 +0900
Subject: [PATCH 1/2] Implement `array.array.__contains__`

---
 stdlib/src/array.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/stdlib/src/array.rs b/stdlib/src/array.rs
index 9e2411cb7..26f5cd39f 100644
--- a/stdlib/src/array.rs
+++ b/stdlib/src/array.rs
@@ -1160,6 +1160,23 @@ mod array {
                 zelf.as_object().dict(),
             ))
         }
+
+        #[pymethod(magic)]
+        fn contains(&self, value: PyObjectRef, vm: &VirtualMachine) -> bool {
+            let array = self.array.read();
+            for element in array
+                .iter(vm)
+                .map(|x| x.expect("Expected to be checked by array.len() and read lock."))
+            {
+                if let Ok(true) =
+                    element.rich_compare_bool(value.as_object(), PyComparisonOp::Eq, vm)
+                {
+                    return true;
+                }
+            }
+
+            false
+        }
     }
 
     impl Comparable for PyArray {

From a866d881e561cd2632bf1e2fdb860622cdbc8e1e Mon Sep 17 00:00:00 2001
From: Moreal <dev.moreal@gmail.com>
Date: Mon, 23 Jan 2023 02:18:45 +0900
Subject: [PATCH 2/2] Add extra_tests for `array.__contains__`

---
 extra_tests/snippets/stdlib_array.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/extra_tests/snippets/stdlib_array.py b/extra_tests/snippets/stdlib_array.py
index cb10c981e..9d9f99695 100644
--- a/extra_tests/snippets/stdlib_array.py
+++ b/extra_tests/snippets/stdlib_array.py
@@ -112,3 +112,8 @@ assert str(a.__class__.__name__) == "array"
 # test arrayiterator name
 i = iter(a)
 assert str(i.__class__.__name__) == "arrayiterator"
+
+# teset array.__contains__
+a = array('B', [0])
+assert a.__contains__(0)
+assert not a.__contains__(1)