S7:-Practice-1.md

@@ -176,7 +176,7 @@ Process finished with exit code 0
 
 ### Exercise 5: count_base() method
 
-Implement the **count_base(self)** method. If the sequence is either null or invalid, the return value should be 0.
+Implement the **count_base(self, base)** method. If the sequence is either null or invalid, the return value should be 0.
 
 * **Filename**: P01/e5.py
 * **Desription**: Write a python program that creates three sequences: one null, one valid, and one invalid and then it prints their lengths, sequences and the number of bases on the console. This is what we should see: