fixed RE strings

Signed-off-by: Jeff Ng <jeffng@precisioninno.com>

Author: jeffng-or

test/basic_port_creator_test.py

@@ -24,7 +24,7 @@ def setUp(self):
 
         self._process = Process(TestUtils.get_base_process_data())
         self._timing_data = TimingData()
-        self._rect_re = re.compile("^\s*RECT\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+\;")
+        self._rect_re = re.compile(r"^\s*RECT\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+\;")
         self._start_y = 0.48
         self._start_pitch = 0.0
         self._threshold = 0.001

test/flow_test.py

@@ -22,11 +22,11 @@ def setUp(self):
         self._results_dir = os.path.join(self._test_dir, "results")
         if os.path.isdir(self._results_dir):
             shutil.rmtree(self._results_dir)
-        self._macro_re = re.compile("^MACRO\s+(\S+)")
-        self._size_re = re.compile("^\s+SIZE\s+(\S+)\s+BY\s+(\S+)")
-        self._start_pin_re = re.compile("^\s+PIN\s+(\S+)")
-        self._macro_name_re = re.compile("\S+_(\d+)x(\d+)")
-        self._pin_dir_re = re.compile("^\s*DIRECTION\s+(\S+)")
+        self._macro_re = re.compile(r"^MACRO\s+(\S+)")
+        self._size_re = re.compile(r"^\s+SIZE\s+(\S+)\s+BY\s+(\S+)")
+        self._start_pin_re = re.compile(r"^\s+PIN\s+(\S+)")
+        self._macro_name_re = re.compile(r"\S+_(\d+)x(\d+)")
+        self._pin_dir_re = re.compile(r"^\s*DIRECTION\s+(\S+)")
 
     def _getLefPin(self, fh, pin_name):
         """Extracts data for given LEF pin and returns it in a dict"""

test/sv_bbox_test.py

@@ -23,7 +23,7 @@ def setUp(self):
         self._process = Process(TestUtils.get_base_process_data())
         self._timing_data = TimingData()
         self._bus_re = re.compile(
-            "^\s*\S+\s+(?:reg)?\s*\[\s*(\d+)\:(\d+)\\s*]\s*(\S+)\s*\,"
+            r"^\s*\S+\s+(?:reg)?\s*\[\s*(\d+)\:(\d+)\s*]\s*(\S+)\s*\,"
         )
 
     def _extract_bus_msb(self, content):

utils/ss_port_organizer.py

@@ -10,7 +10,7 @@ def __init__(self, pin_type_map):
         self._misc_busses = []
         self._misc_ports = []
         self._port_dict = {}
-        self._bus_name_re = re.compile("^(\S+)\[(\d+)\]")
+        self._bus_name_re = re.compile(r"^(\S+)\[(\d+)\]")
         self._pin_type_map = pin_type_map
 
     def get_rw_groups(self):