Update for pip change in main structure (#52)

Python/README.md

@@ -7,14 +7,13 @@ sqlmlutils is a python package to help execute Python code on a SQL Server machi
 Download the zip package file from the dist folder.
 From a command prompt, run
 ```
-python.exe -m pip install --upgrade --upgrade-strategy only-if-needed sqlmlutils-0.7.1.zip
+pip install sqlmlutils
 ```
 
 Note: If you encounter errors installing the pymssql dependency and your client is a Windows machine, consider 
 installing the .whl file at the below link (download the file for your Python version and run pip install): 
 https://www.lfd.uci.edu/~gohlke/pythonlibs/#pymssql
 
-
 If you are developing on your own branch and want to rebuild and install the package, you can use the buildandinstall.cmd script that is included.
 
 # Getting started

Python/buildandinstall.cmd

@@ -1,2 +1,2 @@
 python.exe setup.py sdist --formats=zip
-python.exe -m pip install --upgrade --upgrade-strategy only-if-needed dist\sqlmlutils-0.7.1.zip
+python.exe -m pip install --upgrade --upgrade-strategy only-if-needed dist\sqlmlutils-0.7.2.zip

Python/setup.py

@@ -6,7 +6,7 @@ from setuptools import setup
 setup(
     name='sqlmlutils',
     packages=['sqlmlutils', 'sqlmlutils/packagemanagement'],
-    version='0.7.1',
+    version='0.7.2',
     url='https://github.com/Microsoft/sqlmlutils/Python',
     license='MIT License',
     desciption='A client side package for working with SQL Server',

Python/sqlmlutils/packagemanagement/download_script.py

@@ -7,7 +7,11 @@ import warnings
 import sys
 
 pipversion = LooseVersion(pip.__version__ )
-if pipversion > LooseVersion("10"):
+
+if pipversion >= LooseVersion("19.3"):
+    from pip._internal import pep425tags
+    from pip._internal.main import main as pipmain
+elif pipversion > LooseVersion("10"):
     from pip._internal import pep425tags
     from pip._internal import main as pipmain
 else: