Install NLTK for Python on Windows 7 64 bit

[nursham]

Thank you. That is really helpful.
I think this addition may give some insight to others (this is true as of today):
1) how to download pyyaml:
b) find pyyaml and download the file it in your machine.
2) in order to run the pyyaml, you need to install pip
3) both pip and pyyaml is not an executable file. The pip from the link is outdated so you might want to update it by typing the below command in the command prompt. So open your cmd prompt, direct to the location of where you keep the pip file. Copy paste this command:
a) python -m pip install --upgrade pip
this will update pip. And then type this command:
b) pip install
this will instal pyyaml
4) then download nltk from the above url and type this command:
pip install nltk-3.3-py2.py3-none-any.whl
These commands are based on the assumption you put all your .whl files (including pip file) in the same folder.
The name of the .whl files are also only valid for current date. They will change them in the future.