Python is a cross-platform compatible language .We can install Python in Windows ,Linux and MacOSX .The download link for each platform is given Below
For Windows ,Linux and MacOSX
For Windows ,we need to download the installer separately .For GNU/Linux such as Ubuntu,Debian and MacOSX have pre-installed Python .
Python can be programmed in two ways ,It has an interpreter and also we can program via writing source with extention ".py" .
Python command Interpreter
IDLE Python:GUI of Interpreter