update to python 3 imports

lockfile/__init__.py

@@ -1,4 +1,3 @@
-
 """
 lockfile.py - Platform-independent advisory file locks.
 
@@ -50,6 +49,8 @@
             NotMyLock - File was locked but not by the current thread/process
 """
 
+from __future__ import absolute_import
+
 import sys
 import socket
 import os
@@ -257,7 +258,7 @@ def LinkFileLock(*args, **kwds):
     Do not use in new code.  Instead, import LinkLockFile from the
     lockfile.linklockfile module.
     """
-    import linklockfile
+    from . import linklockfile
     return _fl_helper(linklockfile.LinkLockFile, "lockfile.linklockfile",
                       *args, **kwds)
 
@@ -267,7 +268,7 @@ def MkdirFileLock(*args, **kwds):
     Do not use in new code.  Instead, import MkdirLockFile from the
     lockfile.mkdirlockfile module.
     """
-    import mkdirlockfile
+    from . import mkdirlockfile
     return _fl_helper(mkdirlockfile.MkdirLockFile, "lockfile.mkdirlockfile",
                       *args, **kwds)
 
@@ -277,7 +278,7 @@ def SQLiteFileLock(*args, **kwds):
     Do not use in new code.  Instead, import SQLiteLockFile from the
     lockfile.mkdirlockfile module.
     """
-    import sqlitelockfile
+    from . import sqlitelockfile
     return _fl_helper(sqlitelockfile.SQLiteLockFile, "lockfile.sqlitelockfile",
                       *args, **kwds)
 
@@ -306,10 +307,10 @@ def wrapper(*args, **kwargs):
     return decor
 
 if hasattr(os, "link"):
-    import linklockfile as _llf
+    from . import linklockfile as _llf
     LockFile = _llf.LinkLockFile
 else:
-    import mkdirlockfile as _mlf
+    from . import mkdirlockfile as _mlf
     LockFile = _mlf.MkdirLockFile
 
 FileLock = LockFile