bitbake: Fix Deprecated warnings from regexs

Fix handling of escape characters in regexs and hence fix python
Deprecation warnings which will be problematic in python 3.8.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 10 insertions, 10 deletions

diff --git a/lib/bs4/dammit.py b/lib/bs4/dammit.py
index 68d419feb..805aa908a 100644
--- a/lib/bs4/dammit.py
+++ b/lib/bs4/dammit.py
@@ -45,9 +45,9 @@ except ImportError:
     pass
 
 xml_encoding_re = re.compile(
-    '^<\?.*encoding=[\'"](.*?)[\'"].*\?>'.encode(), re.I)
+    r'^<\?.*encoding=[\'"](.*?)[\'"].*\?>'.encode(), re.I)
 html_meta_re = re.compile(
-    '<\s*meta[^>]+charset\s*=\s*["\']?([^>]*?)[ /;\'">]'.encode(), re.I)
+    r'<\s*meta[^>]+charset\s*=\s*["\']?([^>]*?)[ /;\'">]'.encode(), re.I)
 
 class EntitySubstitution(object):
 
@@ -80,11 +80,11 @@ class EntitySubstitution(object):
         ">": "gt",
         }
 
-    BARE_AMPERSAND_OR_BRACKET = re.compile("([<>]|"
-                                           "&(?!#\d+;|#x[0-9a-fA-F]+;|\w+;)"
-                                           ")")
+    BARE_AMPERSAND_OR_BRACKET = re.compile(r"([<>]|"
+                                           r"&(?!#\d+;|#x[0-9a-fA-F]+;|\w+;)"
+                                           r")")
 
-    AMPERSAND_OR_BRACKET = re.compile("([<>&])")
+    AMPERSAND_OR_BRACKET = re.compile(r"([<>&])")
 
     @classmethod
     def _substitute_html_entity(cls, matchobj):
diff --git a/lib/bs4/element.py b/lib/bs4/element.py
index 0c30759ff..3775a6045 100644
--- a/lib/bs4/element.py
+++ b/lib/bs4/element.py
@@ -10,7 +10,7 @@ from bs4.dammit import EntitySubstitution
 DEFAULT_OUTPUT_ENCODING = "utf-8"
 PY3K = (sys.version_info[0] > 2)
 
-whitespace_re = re.compile("\s+")
+whitespace_re = re.compile(r"\s+")
 
 def _alias(attr):
     """Alias one attribute name to another for backward compatibility"""
@@ -67,7 +67,7 @@ class ContentMetaAttributeValue(AttributeValueWithCharsetSubstitution):
     The value of the 'content' attribute will be one of these objects.
     """
 
-    CHARSET_RE = re.compile("((^|;)\s*charset=)([^;]*)", re.M)
+    CHARSET_RE = re.compile(r"((^|;)\s*charset=)([^;]*)", re.M)
 
     def __new__(cls, original_value):
         match = cls.CHARSET_RE.search(original_value)
@@ -580,7 +580,7 @@ class PageElement(object):
 
     # Methods for supporting CSS selectors.
 
-    tag_name_re = re.compile('^[a-zA-Z0-9][-.a-zA-Z0-9:_]*$')
+    tag_name_re = re.compile(r'^[a-zA-Z0-9][-.a-zA-Z0-9:_]*$')
 
     # /^([a-zA-Z0-9][-.a-zA-Z0-9:_]*)\[(\w+)([=~\|\^\$\*]?)=?"?([^\]"]*)"?\]$/
     #   \---------------------------/  \---/\-------------/    \-------/
@@ -1364,7 +1364,7 @@ class Tag(PageElement):
                 if tag_name == '':
                     raise ValueError(
                         "A pseudo-class must be prefixed with a tag name.")
-                pseudo_attributes = re.match('([a-zA-Z\d-]+)\(([a-zA-Z\d]+)\)', pseudo)
+                pseudo_attributes = re.match(r'([a-zA-Z\d-]+)\(([a-zA-Z\d]+)\)', pseudo)
                 found = []
                 if pseudo_attributes is None:
                     pseudo_type = pseudo