From ecd23ea4c113a6cbeb48efe495c99e5a864460ea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luiz=20Ot=C3=A1vio?= <luizomf@gmail.com>
Date: Tue, 6 Dec 2022 10:52:25 -0300
Subject: [PATCH] =?UTF-8?q?Criando=20sua=20pr=C3=B3pria=20lista=20com=20It?=
 =?UTF-8?q?erable,=20Iterator=20e=20Sequence=20(collections.abc)?=
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---
 aula161.py | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 aula161.py

diff --git a/aula161.py b/aula161.py
new file mode 100644
index 0000000..e8c2650
--- /dev/null
+++ b/aula161.py
@@ -0,0 +1,54 @@
+# Implementando o protocolo do Iterator em Python
+# Essa é apenas uma aula para introduzir os protocolos de collections.abc no
+# Python. Qualquer outro protocolo poderá ser implementando seguindo a mesma
+# estrutura usada nessa aula.
+# https://docs.python.org/3/library/collections.abc.html
+from collections.abc import Sequence
+
+
+class MyList(Sequence):
+    def __init__(self):
+        self._data = {}
+        self._index = 0
+        self._next_index = 0
+
+    def append(self, *values):
+        for value in values:
+            self._data[self._index] = value
+            self._index += 1
+
+    def __len__(self) -> int:
+        return self._index
+
+    def __getitem__(self, index):
+        return self._data[index]
+
+    def __setitem__(self, index, value):
+        self._data[index] = value
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        if self._next_index >= self._index:
+            self._next_index = 0
+            raise StopIteration
+
+        value = self._data[self._next_index]
+        self._next_index += 1
+        return value
+
+
+if __name__ == '__main__':
+    lista = MyList()
+    lista.append('Maria', 'Helena')
+    lista[0] = 'João'
+    lista.append('Luiz')
+    # print(lista[0])
+    # print(len(lista))
+    for item in lista:
+        print(item)
+    print('---')
+    for item in lista:
+        print(item)
+    print('---')