Correct path to script.

source/Object_Oriented_Programming.rst

@@ -116,6 +116,9 @@ A tutorial is available https://biopython.org/wiki/SeqIO ::
     print("sequence =", sv40_rcd.seq)
 
 
+Other example of usage of ``SeqIO``: :download:`seq_io.py <_static/code/seq_io.py>`
+
+
 Exercise
 --------
 
@@ -228,4 +231,4 @@ What is the benefit to use oop style instead of procedural style?
    :linenos:
    :language: python
 
-:download:`fasta_object.py <_static/code/fasta_object.py>` .
\ No newline at end of file
+:download:`fasta_object.py <_static/code/fasta_object.py>` .