roi_harness: fix formatting Signed-off-by: John McMaster <johndmcmaster@gmail.com>

diff --git a/minitests/roi_harness/demo_sw_led.py b/minitests/roi_harness/demo_sw_led.py
index 161151f..3ffb089 100644
--- a/minitests/roi_harness/demo_sw_led.py
+++ b/minitests/roi_harness/demo_sw_led.py

@@ -4,28 +4,39 @@
 import demo_sw_led_fasm
 import os
 
+
 def run(roi_dir, swn, ledn):
     design_txt_fn = roi_dir + '/design.txt'
     bit_ref_fn = roi_dir + '/design.bit'
     fasm_fn = 'demo_sw_led.fasm'
     bit_out_fn = 'demo_sw_led.bit'
-    ocd_cfg = os.getenv('XRAY_DIR') + '/utils/openocd/board-digilent-basys3.cfg'
+    ocd_cfg = os.getenv(
+        'XRAY_DIR') + '/utils/openocd/board-digilent-basys3.cfg'
 
     # Clean up old tmp files to be sure we are generating them fresh
     subprocess.call('rm -f %s %s' % (fasm_fn, bit_out_fn), shell=True)
 
     # subprocess.shell("python3 demo_sw_led.py out_xc7a35tcpg236-1_BASYS3-SWBUT_roi_basev/design.txt 0 0 demo.fasm")
-    demo_sw_led_fasm.run(open(design_txt_fn, 'r'), swn, ledn, open(fasm_fn, 'w'))
-    subprocess.check_call("./fasm2bit.sh %s %s %s" % (fasm_fn, bit_ref_fn , bit_out_fn), shell=True)
-    subprocess.check_call('openocd -f %s -c "init; pld load 0 %s; exit"' % (ocd_cfg, bit_out_fn), shell=True)
+    demo_sw_led_fasm.run(
+        open(design_txt_fn, 'r'), swn, ledn, open(fasm_fn, 'w'))
+    subprocess.check_call(
+        "./fasm2bit.sh %s %s %s" % (fasm_fn, bit_ref_fn, bit_out_fn),
+        shell=True)
+    subprocess.check_call(
+        'openocd -f %s -c "init; pld load 0 %s; exit"' % (ocd_cfg, bit_out_fn),
+        shell=True)
+
 
 if __name__ == '__main__':
     import argparse
 
-    parser = argparse.ArgumentParser(description='Basys3 switch to LED interconnect demo. Compiles and programs')
-    parser.add_argument('roi_dir', help='ROI project dir for harness .bit and  metadata.txt')
+    parser = argparse.ArgumentParser(
+        description=
+        'Basys3 switch to LED interconnect demo. Compiles and programs')
+    parser.add_argument(
+        'roi_dir', help='ROI project dir for harness .bit and  metadata.txt')
     parser.add_argument('sw', type=int, help='Switch to use')
     parser.add_argument('led', type=int, help='LED to use')
-    
+
     args = parser.parse_args()
     run(args.roi_dir, args.sw, args.led)

diff --git a/minitests/roi_harness/demo_sw_led_fasm.py b/minitests/roi_harness/demo_sw_led_fasm.py
index a773fee..e2027c8 100644
--- a/minitests/roi_harness/demo_sw_led_fasm.py
+++ b/minitests/roi_harness/demo_sw_led_fasm.py

@@ -8,6 +8,7 @@
 print()
 print('ready')
 
+
 def load_design(f):
     '''
     name node pin wire
@@ -18,10 +19,11 @@
     f.readline()
     for l in f:
         l = l.strip()
-        name,node,pin,wire = l.split(' ')
+        name, node, pin, wire = l.split(' ')
         ret[name] = wire
     return ret
 
+
 def route2fasm(route, out_f):
     pips = simpleroute.route(route)
     for pip in pips:
@@ -32,26 +34,32 @@
         pip = pip[0:doti] + ' ' + pip[doti + 1:]
         out_f.write(pip + '\n')
 
+
 def run(design_f, swn, ledn, out_f):
     name2wire = load_design(design_f)
     led_name = 'dout[%d]' % ledn
     sw_name = 'din[%d]' % swn
     led_wire = name2wire[led_name]
     sw_wire = name2wire[sw_name]
-    print('Routing %s (%s) => %s (%s)' % (sw_wire, sw_name, led_wire, led_name))
+    print(
+        'Routing %s (%s) => %s (%s)' % (sw_wire, sw_name, led_wire, led_name))
 
     route2fasm((sw_wire, led_wire), out_f)
     # XXX: terminate LEDs so they are off?
 
+
 if __name__ == '__main__':
     import argparse
 
-    parser = argparse.ArgumentParser(description='Switch to LED interconnect demo: FASM generator')
+    parser = argparse.ArgumentParser(
+        description='Switch to LED interconnect demo: FASM generator')
     parser.add_argument('design_txt', help='ROI metadata file')
     parser.add_argument('sw', type=int, help='Switch to use')
     parser.add_argument('led', type=int, help='LED to use')
     # For now can't use stdout since simpleroute is spewing out prints
     parser.add_argument('out_fasm', help='Output .fasm file')
-    
+
     args = parser.parse_args()
-    run(open(args.design_txt, 'r'), args.sw, args.led, open(args.out_fasm, 'w'))
+    run(
+        open(args.design_txt, 'r'), args.sw, args.led, open(
+            args.out_fasm, 'w'))

diff --git a/minitests/roi_harness/test_demo_sw_led.py b/minitests/roi_harness/test_demo_sw_led.py
index 0a35abd..cd5b77f 100644
--- a/minitests/roi_harness/test_demo_sw_led.py
+++ b/minitests/roi_harness/test_demo_sw_led.py

@@ -3,6 +3,7 @@
 import unittest
 import demo_sw_led
 
+
 class TestStringMethods(unittest.TestCase):
     def test_all(self):
         for i in range(8):
@@ -12,5 +13,6 @@
             print(i)
             demo_sw_led.run('out_xc7a35tcpg236-1_BASYS3-SWBUT_roi_basev', i, i)
 
+
 if __name__ == '__main__':
     unittest.main()

diff --git a/tools/simpleroute.py b/tools/simpleroute.py
index 6a78fb4..5691f86 100755
--- a/tools/simpleroute.py
+++ b/tools/simpleroute.py

@@ -119,7 +119,8 @@
         try:
             write_scores(set([dst_node]), 1)
         except RecursionError as e:
-            raise Exception("Could not find route for node %s" % (dst_node,)) from None
+            raise Exception("Could not find route for node %s" %
+                            (dst_node, )) from None
         print("  route length: %d" % node_scores[src_node])
 
         count = 0