Fix several DeprecationWarning: invalid escape sequence (#15733)

Summary:
Hello,

This is a little patch to fix `DeprecationWarning: invalid escape sequence`.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/15733

Differential Revision: D13587291

Pulled By: soumith

fbshipit-source-id: ce68db2de92ca7eaa42f78ca5ae6fbc1d4d90e05

caffe2/contrib/cuda-convnet2/python_util/data.py

@@ -29,7 +29,7 @@ class DataLoaderThread(Thread):
         self.tgt += [unpickle(self.path)]
         
 class DataProvider:
-    BATCH_REGEX = re.compile('^data_batch_(\d+)(\.\d+)?$')
+    BATCH_REGEX = re.compile(r'^data_batch_(\d+)(\.\d+)?$')
     def __init__(self, data_dir, batch_range=None, init_epoch=1, init_batchnum=None, dp_params={}, test=False):
         if batch_range == None:
             batch_range = DataProvider.get_batch_nums(data_dir)

caffe2/contrib/cuda-convnet2/python_util/util.py

@@ -48,7 +48,7 @@ def unpickle(filename):
     return dict
 
 def is_intel_machine():
-    VENDOR_ID_REGEX = re.compile('^vendor_id\s+: (\S+)')
+    VENDOR_ID_REGEX = re.compile(r'^vendor_id\s+: (\S+)')
     f = open('/proc/cpuinfo')
     for line in f:
         m = VENDOR_ID_REGEX.match(line)

caffe2/python/docs/parser.py

@@ -19,10 +19,10 @@ class Parser(object):
         ('```(.+?)```',
          lambda m, f: f.addCode(m.group(1))
          ),
-        ('((( {2})+)(\S.*)(\n\s*\n|\n))+',
+        (r'((( {2})+)(\S.*)(\n\s*\n|\n))+',
          lambda m, f: f.addCode(m.group(0))
          ),
-        ('([^\.])\n',
+        (r'([^\.])\n',
          lambda m, f: f.addRaw('{c} '.format(c=m.group(1))) or True
          ),
         ('`(.+?)`',
@@ -30,13 +30,13 @@ class Parser(object):
          ),
         # Make links clickable
         ('http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]'
-         '|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+',
+         r'|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+',
          lambda m, f: f.addLink(m.group(0), m.group(0))
          ),
-        ('\*\*(.+?)\*\*',
+        (r'\*\*(.+?)\*\*',
          lambda m, f: f.addEmphasis(m.group(1), 2)
          ),
-        ('\*(.+?)\*',
+        (r'\*(.+?)\*',
          lambda m, f: f.addEmphasis(m.group(1), 1)
          ),
     ]

scripts/diagnose_protobuf.py

@@ -50,7 +50,7 @@ else:
         print('DEBUG: err: ' + err)
         native_protobuf_installed = False
     else:
-        tmp = re.search('\d\.\d\.\d', out)
+        tmp = re.search(r'\d\.\d\.\d', out)
         if tmp:
             native_version = tmp.group(0)
             native_protobuf_installed = True

tools/amd_build/pyHIPIFY/hipify_python.py

@@ -613,7 +613,7 @@ def disable_function(input_string, function, replace_style):
     else:
         # Automatically detect signature.
         the_match = re.search(r"(((.*) (\*)?)({0})(\([^{{)]*\)))\s*{{".format(
-            function.replace("(", "\(").replace(")", "\)")), input_string)
+            function.replace("(", r"\(").replace(")", r"\)")), input_string)
         if the_match is None:
             return input_string
 
@@ -1177,7 +1177,7 @@ def extract_arguments(start, string):
     return arguments
 
 
-RE_HIP_LAUNCH_KERNEL_GGL = re.compile("hipLaunchKernelGGL\(")
+RE_HIP_LAUNCH_KERNEL_GGL = re.compile(r"hipLaunchKernelGGL\(")
 
 
 # Add static_cast to ensure that the type of kernel arguments matches that in the corresponding kernel definition