fully make bs4 and soupsieve standalone in the project

lib/soupsieve/css_match.py

@@ -6,7 +6,8 @@ from .import css_types as ct
 import unicodedata
 from collections.abc import Sequence
 
-import bs4
+from ..bs4 import *
+from ..bs4.element import *
 
 # Empty tag pattern (whitespace okay)
 RE_NOT_EMPTY = re.compile('[^ \t\r\n\f]')
@@ -90,37 +91,37 @@ class _DocumentNav(object):
     @staticmethod
     def is_doc(obj):
         """Is `BeautifulSoup` object."""
-        return isinstance(obj, bs4.BeautifulSoup)
+        return isinstance(obj, BeautifulSoup)
 
     @staticmethod
     def is_tag(obj):
         """Is tag."""
-        return isinstance(obj, bs4.Tag)
+        return isinstance(obj, Tag)
 
     @staticmethod
     def is_declaration(obj):  # pragma: no cover
         """Is declaration."""
-        return isinstance(obj, bs4.Declaration)
+        return isinstance(obj, Declaration)
 
     @staticmethod
     def is_cdata(obj):
         """Is CDATA."""
-        return isinstance(obj, bs4.CData)
+        return isinstance(obj, CData)
 
     @staticmethod
     def is_processing_instruction(obj):  # pragma: no cover
         """Is processing instruction."""
-        return isinstance(obj, bs4.ProcessingInstruction)
+        return isinstance(obj, ProcessingInstruction)
 
     @staticmethod
     def is_navigable_string(obj):
         """Is navigable string."""
-        return isinstance(obj, bs4.NavigableString)
+        return isinstance(obj, NavigableString)
 
     @staticmethod
     def is_special_string(obj):
         """Is special string."""
-        return isinstance(obj, (bs4.Comment, bs4.Declaration, bs4.CData, bs4.ProcessingInstruction, bs4.Doctype))
+        return isinstance(obj, (Comment, Declaration, CData, ProcessingInstruction, Doctype))
 
     @classmethod
     def is_content_string(cls, obj):