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Up arrow key does not work in Python IDLE Editor to pull out the previous command. Alt + p : Previous commend Alt + n : Next commend Let's try these! Thanks, JF

When you are using text-based system such as linux terminal or windows dos (or powerhsell), you may want open file of  python ( blahblah.py ) through IDLE. In this case, you can use below commands If python path is here C:\Python27\ In order to open IDLE, you have to open using pythonw.exe So you can do like this. C:\Python27\pythonw.exe C:\Python27\Lib\idlelib\idle.py .\blahblah.py Thanks! Have fun!

When you face this kinds of problem in Windows, you could check below two things in registry. 1. HKEY_CLASSES_ROOT\Python.File 2. HKEY_CLASSES_ROOT\*\shell First, HKEY_CLASSES_ROOT\Python.File 1> Open regedit 2> Go to 'HKEY_CLASSES_ROOT\Python.File\shell\Edit with IDLE\command', if it does not exist create it by click right mouse button. 3> Adjust the value of key;  "[PYTHONPATH]\pythonw.exe" "[PYTHONPATH]\Lib\idlelib\idle.pyw" -e "%1" 4> And then go to 'HKEY_CLASSES_ROOT\Python.NoConFile\shell\Edit with IDLE\command'. 5> Adjust the value of key;  "[PYTHONPATH]\pythonw.exe" "[PYTHONPATH]\Lib\idlelib\idle.pyw" -e "%1" Second, HKEY_CLASSES_ROOT\*\shell 1> Open regedit 2> Go to 'HKEY_CLASSES_ROOT\*\shell' and create a key below with name of 'command'. 3> Adjust the value of key;  "[PYTHONPATH]\pythonw.exe"