add examplel for a stand-alone python file

pythonintro/Python_Skeleton_Simple.py

+##
+## define relevant functions and/or classes
+##
+
+# ... your code goes here ...
+
+##
+## Main program
+## Python uses the name to indicate the main program. If the program is executed, the code below is called.
+##
+
+if __name__ == '__main__':
+    # ... your code goes here ...
+

pythonintro/solutions/Fibonacci.py

+
+
+
+
+
+
+##
+## define relevant functions
+##
+def compute_Fibonacci(n_numbers):
+    return_list = [0, 1]
+    for i in range(2,n_numbers,1):
+        Fib = return_list[i-1]  + return_list[i-2]
+        return_list.append(Fib)
+    return return_list
+
+
+##
+## Main program
+## Python uses the name to indicate the main program. If the program is executed, the code below is called.
+##
+
+if __name__ == '__main__':
+
+    # get 10 Fibonacci numbers
+    Fib = compute_Fibonacci(n_numbers=10)
+
+    # write the Fibonacci numbers to a file
+    with open('fibonacci.txt','w') as f:
+        for number in Fib:
+            f.write(str(number) + '\n')
+
+    
+    
+