unused imports, pep8

Lib/importlib/_bootstrap.py

@@ -406,14 +406,16 @@ class _LoaderBasics:
                 pass
             else:
                 if _r_long(raw_timestamp) != source_mtime:
-                    raise ImportError("bytecode is stale for {}".format(fullname))
+                    raise ImportError(
+                        "bytecode is stale for {}".format(fullname))
             try:
                 source_size = source_stats['size'] & 0xFFFFFFFF
             except KeyError:
                 pass
             else:
                 if _r_long(raw_size) != source_size:
-                    raise ImportError("bytecode is stale for {}".format(fullname))
+                    raise ImportError(
+                        "bytecode is stale for {}".format(fullname))
         # Can't return the code object as errors from marshal loading need to
         # propagate even when source is available.
         return data[12:]
@@ -890,7 +892,7 @@ class _ImportLockContext:
 
 def _resolve_name(name, package, level):
     """Resolve a relative module name to an absolute one."""
-    bits = package.rsplit('.', level-1)
+    bits = package.rsplit('.', level - 1)
     if len(bits) < level:
         raise ValueError('attempted relative import beyond top-level package')
     base = bits[0]
@@ -1010,7 +1012,7 @@ def _handle_fromlist(module, fromlist, import_):
             fromlist = list(fromlist)
             fromlist.remove('*')
             fromlist.extend(module.__all__)
-        for x in (y for y in fromlist if not hasattr(module,y)):
+        for x in (y for y in fromlist if not hasattr(module, y)):
             try:
                 import_('{0}.{1}'.format(module.__name__, x))
             except ImportError:

Lib/importlib/abc.py

 """Abstract base classes related to import."""
 from . import _bootstrap
 from . import machinery
-from . import util
 import abc
 import imp
-import io
 import marshal
-import os.path
 import sys
 import tokenize
-import types
 import warnings
 
 
@@ -256,7 +252,8 @@ class PyPycLoader(PyLoader):
             try:
                 magic = data[:4]
                 if len(magic) < 4:
-                    raise ImportError("bad magic number in {}".format(fullname))
+                    raise ImportError(
+                        "bad magic number in {}".format(fullname))
                 raw_timestamp = data[4:8]
                 if len(raw_timestamp) < 4:
                     raise EOFError("bad timestamp in {}".format(fullname))
@@ -264,7 +261,8 @@ class PyPycLoader(PyLoader):
                 bytecode = data[8:]
                 # Verify that the magic number is valid.
                 if imp.get_magic() != magic:
-                    raise ImportError("bad magic number in {}".format(fullname))
+                    raise ImportError(
+                        "bad magic number in {}".format(fullname))
                 # Verify that the bytecode is not stale (only matters when
                 # there is source to fall back on.
                 if source_timestamp: