Fix DeprecationWarning: the imp module is deprecated in favour of importlib in pep425tags.py

src/pip/_internal/pep425tags.py

@@ -11,6 +11,7 @@ import warnings
 from collections import OrderedDict
 
 import pip._internal.utils.glibc
+from pip._internal.utils.compat import get_extension_suffixes
 
 logger = logging.getLogger(__name__)
 
@@ -252,10 +253,9 @@ def get_supported(versions=None, noarch=False, platform=None,
         abis[0:0] = [abi]
 
     abi3s = set()
-    import imp
-    for suffix in imp.get_suffixes():
-        if suffix[0].startswith('.abi'):
-            abi3s.add(suffix[0].split('.', 2)[1])
+    for suffix in get_extension_suffixes():
+        if suffix.startswith('.abi'):
+            abi3s.add(suffix.split('.', 2)[1])
 
     abis.extend(sorted(list(abi3s)))
 

src/pip/_internal/utils/compat.py

@@ -25,6 +25,7 @@ except ImportError:
 __all__ = [
     "ipaddress", "uses_pycache", "console_to_str", "native_str",
     "get_path_uid", "stdlib_pkgs", "WINDOWS", "samefile", "get_terminal_size",
+    "get_extension_suffixes",
 ]
 
 
@@ -160,6 +161,18 @@ def get_path_uid(path):
     return file_uid
 
 
+if sys.version_info >= (3, 4):
+    from importlib.machinery import EXTENSION_SUFFIXES
+
+    def get_extension_suffixes():
+        return EXTENSION_SUFFIXES
+else:
+    from imp import get_suffixes
+
+    def get_extension_suffixes():
+        return [suffix[0] for suffix in get_suffixes()]
+
+
 def expanduser(path):
     """
     Expand ~ and ~user constructions.