_ Tkinter. TclError: no display name and no $ DISPLAY environment variable, displayvariable

_ Tkinter. TclError: no display name and no $ DISPLAY environment variable, displayvariable

_ Tkinter. TclError: no display name and no $ DISPLAY environment variable

This is a problem that occurs when you use the pluginx inx of the cocos2d-x. In a win32 environment, run gameDevGuide. sh with cygwin, and this prompt appears.

The solution is relatively simple. In the cygwin directory, delete the python-related files in the bin and lib directories (the file name contains python files.

No display name and no $ display environment variable

Run startxwin. bat first.
Run ns example2.tcl.

For ns2-installation problems in LINUX

This variable is a graphical interface. In the graphic interface, the system will automatically define it.