diff --git a/aula91.py b/aula91.py
new file mode 100644
index 0000000..c050ea1
--- /dev/null
+++ b/aula91.py
@@ -0,0 +1,15 @@
+# Introdução às Generator functions em Python
+# generator = (n for n in range(1000000))
+
+def generator(n=0, maximum=10):
+    while True:
+        yield n
+        n += 1
+
+        if n >= maximum:
+            return
+
+
+gen = generator(maximum=1000000)
+for n in gen:
+    print(n)