From 7a66371ac203002b778fae5dadc2e6df5363a3da Mon Sep 17 00:00:00 2001
From: harshal <harshal.c@amazatic.net>
Date: Sun, 6 Jun 2021 23:37:18 +0530
Subject: [PATCH] Add python generator and examples

---
 sheets/_python3/generator | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 sheets/_python3/generator

diff --git a/sheets/_python3/generator b/sheets/_python3/generator
new file mode 100644
index 0000000..bd23f7e
--- /dev/null
+++ b/sheets/_python3/generator
@@ -0,0 +1,20 @@
+# Declare a function that behaves like an iterator.
+# Any function with yeild returns generator.
+# Generators follow lazy evaluation.
+# lazy evaluation means that the object is evaluated when it is needed,
+# not when it is created.
+
+def my_generator(start, end, step=1):
+    while start < end:
+        yeild start
+        start += step
+
+gen = my_generator(start=1, end=10)
+next(gen), next(gen), next(gen)
+# (1, 2, 3)
+
+gen = (i for i in range(1, 100) if i%2==0)
+next(gen), next(gen), next(gen), next(gen)
+# (2, 4, 6, 8)
+
+# https://wiki.python.org/moin/Generators
\ No newline at end of file