setting up python 3.4.3 on window 7.

[Pythondjango]

Greetings to you all.
It is my pleasure to meet you all.
Please i have a problem in installing a new python 3.4.3 version,even though i had installed the python 2.7.6 version on my window 7 pc through the help of a distant friend who is a python programmer and it running good.And now,i am also trying to become a python programmer, so please can any distinguished gentlemen or ladies give me a realistic details of how i will install this python 3.4.3 version so that i can start writing and learning by practice with its idle. THANKS.

[ADEWALE ADISA]

Hi guy,
It will be cumbersome for you to have bothe versions on your systems without using virtualenv.
But as you said you are just stating, my advice for you is to uninstall the old version completely and then install the 3.4.3 fresh.
If u don't unstall the old version, as u are typing "python" on your cmd prompt its the old version that would be coming up since it is the one registered into your path.
So below are your options:
1. Unstall 2.7 and install 3.4.3
2. Install 3.4.3, rename the python executable from "python" to "python3". THEN add python3 to your path.
3. Use virtualenv and virtualwrapper

Hope it help.

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[Vernon D. Cole]

Multiple versions of Python will happily run side-by-side on Windows.  I regularly have at least six versions installed for testing purposes.

When you install Python 3.4, (using the standard installer from python.org) it will also install the Python Launcher for Windows.  Using it, you will always type "py" (rather than "python") to launch your Python scripts.  A specific version of Python is selected using a command line switch:  "py somefile.py" will start the highest-version Python 2.  "py -3 somefile.py" will start the highest-version Python 3.  You can also select specific releases or 32 vs 64 bit versions. Each version has its own library, so there is no confusion. But, unless you have a specific need for Python2, don't bother with it.

The Python Launcher for Windows also looks for a "hash-bang" on the first line of your program to specify a specific version of Python. For example, if the your script starts with:
#!/usr/lib/python3
then the latest Python 3 on your system will be used. (The /usr/lib is ignored on Windows).

Also, I strongly advise against using IDLE to learn Python.  It is the worst of many Python Integrated Development Environments.  You will find it much easier to learn with a tool like the free community edition of PyCharm. (https://www.jetbrains.com/pycharm/) When you are ready to use django seriously, you will want to pay for the professional edition, and run django on a virtual Linux computer. PyCharm will make that much easier. Also, try to avoid using Windows as a production django server if you have that option.