diff --git a/Lib/glob.py b/Lib/glob.py
--- a/Lib/glob.py
+++ b/Lib/glob.py
@@ -4,7 +4,7 @@
 import re
 import fnmatch
 
-__all__ = ["glob", "iglob"]
+__all__ = ["glob", "iglob", "escape"]
 
 def glob(pathname, *, recursive=False):
     """Return a list of paths matching a pathname pattern.
@@ -56,8 +56,11 @@
     # `os.path.split()` returns the argument itself as a dirname if it is a
     # drive or UNC path.  Prevent an infinite recursion if a drive or UNC path
     # contains magic characters (i.e. r'\\?\C:').
-    if dirname != pathname and has_magic(dirname):
-        dirs = _iglob(dirname, recursive)
+    if not has_magic(dirname) and not os.path.isdir(dirname):
+        return
+    elif dirname != pathname and has_magic(dirname):
+        dirs = (d for d in _iglob(dirname, recursive) if
+                                        not d or os.path.isdir(d))
     else:
         dirs = [dirname]
     if has_magic(basename):
@@ -115,6 +118,8 @@
             dirname = bytes(os.curdir, 'ASCII')
         else:
             dirname = os.curdir
+    assert os.path.isdir(dirname)
+
     try:
         names = os.listdir(dirname)
     except os.error:
@@ -123,8 +128,9 @@
         if not _ishidden(x):
             yield x
             path = os.path.join(dirname, x) if dirname else x
-            for y in _rlistdir(path):
-                yield os.path.join(x, y)
+            if os.path.isdir(path):
+                for y in _rlistdir(path):
+                    yield os.path.join(x, y)
 
 
 magic_check = re.compile('([*?[])')