Python27.dll module error from Python 2.7.15/PCbuild/get_externals.bat

[amit.singh2241 at gmail.com]

I am trying to compile the freshly downloaded Python 2.7.15. 
When the PCBuild/build.bat goes to pull-in the external modules along with their dependencies it encounters this error for each of the external modules.

F:\Dev\depot\tools\source\python\Python-2.7.15>.\PCbuild\get_externals.bat
Using "F:\Dev\depot\tools\source\python\Python-2.7.15\PCbuild\\..\externals\pyth
onx86\tools\python.exe" (found in externals directory)
Fetching external libraries...
e is e
Fetching bzip2-1.0.6...
Traceback (most recent call last):
  File "F:\Dev\depot\tools\source\python\Python-2.7.15\PCbuild\\get_external.py"
, line 7, in <module>
    from urllib.request import urlretrieve
  File "F:\Dev\depot\tools\source\python\Python-2.7.15\externals\pythonx86\tools
\lib\urllib\request.py", line 88, in <module>
    import http.client
  File "F:\Dev\depot\tools\source\python\Python-2.7.15\externals\pythonx86\tools
\lib\http\client.py", line 71, in <module>
    import email.parser
  File "F:\Dev\depot\tools\source\python\Python-2.7.15\externals\pythonx86\tools
\lib\email\parser.py", line 12, in <module>
    from email.feedparser import FeedParser, BytesFeedParser
  File "F:\Dev\depot\tools\source\python\Python-2.7.15\externals\pythonx86\tools
\lib\email\feedparser.py", line 27, in <module>
    from email._policybase import compat32
  File "F:\Dev\depot\tools\source\python\Python-2.7.15\externals\pythonx86\tools
\lib\email\_policybase.py", line 9, in <module>
    from email.utils import _has_surrogates
  File "F:\Dev\depot\tools\source\python\Python-2.7.15\externals\pythonx86\tools
\lib\email\utils.py", line 29, in <module>
    import socket
  File "F:\Dev\depot\tools\source\python\Python-2.7.15\externals\pythonx86\tools
\lib\socket.py", line 49, in <module>
    import _socket
ImportError: Module use of python27.dll conflicts with this version of Python.
Fetching bsddb-4.7.25.0...
Traceback (most recent call last):
  File "F:\Dev\depot\tools\source\python\Python-2.7.15\PCbuild\\get_external.py"

I tried installing python versions 3.6.4 and 2.7.15 to see if it works because I read in the build script that if python is already installed then it will use that else it will install it's own python in externals and use it.
But no luck! It keeps giving me the same error again and again. Even if I execute "builds.bat -e" it gets into the same trap though it goes ahead and compiles but then compiler throws error due to half-baked external modules.

Any help will be highly appreciated !

--Amit Kumar Singh