Error while installing robotframework -ride

I'm new to Python and have been trying to install some packages with pip.

I have gone through this sequence-------------

Download Python 2.7.15 from

https://www.python.org/downloads/

PATH = C:C:\Python27;C:\Python27\Scripts 
(Is this we have to set in User Variable or System Variable?)

Then download wxPython from this link (Download this version wxPython2.8-win64-unicode-2.8.12.1-py27)

http://sourceforge.net/projects/wxpython/files/wxPython/2.8.12.1/

Then

Download setuptools (setuptools-39.2.0.zip) for Python from

https://pypi.org/project/setuptools/#files

Then

Download PIP files (pip-10.0.1.tar.gz) from

https://pypi.org/project/pip/#files

Now Extract the Setuptools

After extracting from the same folder TYPE "cmd" it will open then run this commend

"python setup.py install"

Now Extract the PIP files

After extracting from the same folder TYPE "cmd" it will open then run this commend

"pip install robotframework"

On the cmd run these commends one-by-one

pip install robotframework-ride
pip install robotframework-selenium2library
pip install selenium
pip install decorator
pip install docutils
pip install xlrd
pip install xlwt
pip install xlutils
pip install pigments

But pip install robotframework-ride unroll gives me

D:\Python\pip-10.0.1\pip-10.0.1>pip install robotframework-ride
Collecting robotframework-ride
Using cached https://files.pythonhosted.org/packages/3c/14/a5f97f5cf5e981f01e8
c0b4c405b0dfc9bc86500cabb044d2c462f73004a/robotframework-ride-1.5.2.1.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\Deeksha\AppData\Local\Temp\pip-install-f5wsnk57\robotframew
 ork-ride\setup.py", line 20, in <module>
    execfile(join(ROOT_DIR, 'src', 'robotide', 'version.py'))
 NameError: name 'execfile' is not defined

 ----------------------------------------
  Command "python setup.py egg_info" failed with error code 1 in C:\Users\Deeksha\
  AppData\Local\Temp\pip-install-f5wsnk57\robotframework-ride\

How can I solve this?