Try "py" instead of "python" from command line:
C:UsersCpsa>py
Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:38:22) [MSC v.1600 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…