Added description for test file and in __str__

b_asic/signal_flow_graph.py

@@ -352,6 +352,9 @@ class SFG(AbstractOperation):
 
     
     def __str__(self):
+        """Prints operations, inputs and outputs in a SFG 
+        """
+
         output_string = ""
 
         for comp in self._components_in_dfs_order:

test/test_print_sfg.py

+"""
+B-ASIC test suite for printing a SFG
+"""
+
+
 from b_asic.signal_flow_graph import SFG
 from b_asic.core_operations import Addition, Multiplication, Constant, ConstantAddition
 from b_asic.port import InputPort, OutputPort
@@ -6,7 +11,6 @@ from b_asic.special_operations import Input, Output
 
 import pytest
 
-""" Formatting is tested manually by checking the output print. Needed good eyes """
 
 class TestPrintSfg:
     def test_print_one_addition(self):