Added lambda.py file to get understanding of lambda functions in Python

samples/function/lambda.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import math
+
+# Function using def
+def my_abs(x):
+    if not isinstance(x, (int, float)):
+        raise TypeError('bad operand type')
+    if x >= 0:
+        return x
+    else:
+        return -x
+
+# Lambda function equivalent
+lambda_abs = lambda x: x if x >= 0 else -x
+
+# Function using def
+def move(x, y, step, angle=0):
+    nx = x + step * math.cos(angle)
+    ny = y - step * math.sin(angle)
+    return nx, ny
+
+# Lambda function equivalent
+lambda_move = lambda x, y, step, angle=0: (x + step * math.cos(angle), y - step * math.sin(angle))
+
+# Examples
+n_def = my_abs(-20)
+n_lambda = lambda_abs(-20)
+print(n_def, n_lambda)
+
+x_def, y_def = move(100, 100, 60, math.pi / 6)
+x_lambda, y_lambda = lambda_move(100, 100, 60, math.pi / 6)
+print(x_def, y_def, x_lambda, y_lambda)
+
+
+my_abs('123')