Remove unused import

IPython/utils/terminal.py

@@ -1,121 +1,120
 # encoding: utf-8
 """
 Utilities for working with terminals.
 
 Authors:
 
 * Brian E. Granger
 * Fernando Perez
 * Alexander Belchenko (e-mail: bialix AT ukr.net)
 """
 
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 
 import os
-import struct
 import sys
 import warnings
 try:
     from shutil import get_terminal_size as _get_terminal_size
 except ImportError:
     # use backport on Python 2
     from backports.shutil_get_terminal_size import get_terminal_size as _get_terminal_size
 
 from . import py3compat
 
 #-----------------------------------------------------------------------------
 # Code
 #-----------------------------------------------------------------------------
 
 # This variable is part of the expected API of the module:
 ignore_termtitle = True
 
 
 
 if os.name == 'posix':
     def _term_clear():
         os.system('clear')
 elif sys.platform == 'win32':
     def _term_clear():
         os.system('cls')
 else:
     def _term_clear():
         pass
 
 
 
 def toggle_set_term_title(val):
     """Control whether set_term_title is active or not.
 
     set_term_title() allows writing to the console titlebar.  In embedded
     widgets this can cause problems, so this call can be used to toggle it on
     or off as needed.
 
     The default state of the module is for the function to be disabled.
 
     Parameters
     ----------
       val : bool
         If True, set_term_title() actually writes to the terminal (using the
         appropriate platform-specific module).  If False, it is a no-op.
     """
     global ignore_termtitle
     ignore_termtitle = not(val)
 
 
 def _set_term_title(*args,**kw):
     """Dummy no-op."""
     pass
 
 
 def _set_term_title_xterm(title):
     """ Change virtual terminal title in xterm-workalikes """
     sys.stdout.write('\033]0;%s\007' % title)
 
 if os.name == 'posix':
     TERM = os.environ.get('TERM','')
     if TERM.startswith('xterm'):
         _set_term_title = _set_term_title_xterm
 elif sys.platform == 'win32':
     try:
         import ctypes
 
         SetConsoleTitleW = ctypes.windll.kernel32.SetConsoleTitleW
         SetConsoleTitleW.argtypes = [ctypes.c_wchar_p]
     
         def _set_term_title(title):
             """Set terminal title using ctypes to access the Win32 APIs."""
             SetConsoleTitleW(title)
     except ImportError:
         def _set_term_title(title):
             """Set terminal title using the 'title' command."""
             global ignore_termtitle
 
             try:
                 # Cannot be on network share when issuing system commands
                 curr = py3compat.getcwd()
                 os.chdir("C:")
                 ret = os.system("title " + title)
             finally:
                 os.chdir(curr)
             if ret:
                 # non-zero return code signals error, don't try again
                 ignore_termtitle = True
 
 
 def set_term_title(title):
     """Set terminal title using the necessary platform-dependent calls."""
     if ignore_termtitle:
         return
     _set_term_title(title)
 
 
 def freeze_term_title():
     warnings.warn("This function is deprecated, use toggle_set_term_title()")
     global ignore_termtitle
     ignore_termtitle = True
 
 
 def get_terminal_size(defaultx=80, defaulty=25):
     return _get_terminal_size((defaultx, defaulty))