Chapter folders renamed

Chapter02/modules_import/calcmain2.py

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+# calcmain2.py with  alias for modules
+import mycalculator as calc
+import myrandom as rand
+
+
+def my_main():
+    """ This is a main function which generates two random numbers and then apply calculator functions on them """
+    x = rand.random_2d()
+    y = rand.random_1d()
+
+    sum = calc.add(x,y)
+    diff = calc.subtract(x,y)
+
+    print("x = {}, y = {}".format(x,y))
+    print("sum is {}".format(sum))
+    print("diff is {}".format(diff))
+
+    print (globals())
+
+""" This is executed only if the special variable '__name__' is set as main"""
+if __name__ == "__main__":
+    my_main()