Upgrade pip to a newer version when install via curl to support Python 3.8

[MrStrik3]

Describe the bug
The installation of azure-cli with python 3.8 doesn't work anymore. The installation uses the attribute "linux_distribution" of the module platform and linux_distribution has been marked as deprecated since python 3.5 and has been remove in python 3.8.

To Reproduce
(needs python 3.8 installed as default python)
curl -L https://aka.ms/InstallAzureCli | bash

Expected behavior
Should install, get this instead
➜ azure-cli curl -L https://aka.ms/InstallAzureCli | bash
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
100 1369 100 1369 0 0 1444 0 --:--:-- --:--:-- --:--:-- 3048
Downloading Azure CLI install script from https://azurecliprod.blob.core.windows.net/install.py to /tmp/azure_cli_install_tmp_jJk8ou.
######################################################################## 100.0%
/tmp/azure_cli_install_tmp_jJk8ou: OK
Running install script.
-- Verifying Python version.
-- Python version 3.8.0 okay.
Traceback (most recent call last):
File "/tmp/azure_cli_install_tmp_jJk8ou", line 370, in
main()
File "/tmp/azure_cli_install_tmp_jJk8ou", line 349, in main
verify_native_dependencies()
File "/tmp/azure_cli_install_tmp_jJk8ou", line 309, in verify_native_dependencies
distname, version, _ = platform.linux_distribution()
AttributeError: module 'platform' has no attribute 'linux_distribution'

Environment summary
ArchLinux, python 3.8, bash

[rnnr]

The function platform.linux_distribution() is deprecated since python 3.5 and was removed in Python 3.8, according to this: https://bugs.python.org/issue28167

[rnnr]

Aside the install.py script using that function, also pip has to be updated to a newer version - currently used version 8.1.0 (3.5 years old) is using it too in download.py. I did no investigation beyond this point.

[fengzhou-msft]

@haroldrandom please take a look at the pip version issue mentioned above.

[haroldrandom]

1. @MrStrik3 Currently, azure-cli didn't support get installed like this on ArchLinux. Please try pip install instead. We are considerring support ArchLinux or not.
2. platform.linux_distribution() deprecation problem in Python 3.8 should be fixed here.
   2.1 Please have a wait until the latest azrure-cli release or try against dev branch or downgrade to Python 3.7
   2.2 But since you are on ArchLinux, I think it's likely fail again. Please consider install azure-cli using another way.
3. @rnnr Thanks for the feedback. We will consider upgrading the pip.

[haroldrandom]

@MrStrik3 we have no plan for support install azure-cli on ArchLinux for now. Maybe later if users from ArchLinux request more.

I think this can be closed if a new version of pip is not your request feel.
Feel free to reopen and modify the title.

[rnnr]

This is IMHO not about Arch Linux but about Python 3.8 and using outdated libs - manifestation in Arch Linux is just matter of "luck" and some unwise decisions about Python made by the maintainers of the distro. The same would happen to anybody trying to use Python 3.8, Arch Linux is just the first affected.

…

On Fri, 22 Nov 2019, 07:52 Jianhui Harold, ***@***.***> wrote: Closed #11344 <#11344>. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#11344?email_source=notifications&email_token=ABSDOU2PBZKBAMCVT3WCIGDQU56UXA5CNFSM4JQCIIOKYY3PNVWWK3TUL52HS4DFWZEXG43VMVCXMZLOORHG65DJMZUWGYLUNFXW5KTDN5WW2ZLOORPWSZGOVA3YBPA#event-2822209724>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABSDOU2FG5M4KJ7NWZW4ZATQU56UXANCNFSM4JQCIIOA> .

[rnnr]

Using Python 3.7 on Arch Linux of course works as temp. workaround. You will still need to upgrade to newer pip to make installation working on Python.3.8 -- please reopen the issue and fix that. I'm willing to test it.

…

On Fri, 22 Nov 2019, 08:04 Rostislav Matl, ***@***.***> wrote: This is IMHO not about Arch Linux but about Python 3.8 and using outdated libs - manifestation in Arch Linux is just matter of "luck" and some unwise decisions about Python made by the maintainers of the distro. The same would happen to anybody trying to use Python 3.8, Arch Linux is just the first affected. On Fri, 22 Nov 2019, 07:52 Jianhui Harold, ***@***.***> wrote: > Closed #11344 <#11344>. > > — > You are receiving this because you were mentioned. > Reply to this email directly, view it on GitHub > <#11344?email_source=notifications&email_token=ABSDOU2PBZKBAMCVT3WCIGDQU56UXA5CNFSM4JQCIIOKYY3PNVWWK3TUL52HS4DFWZEXG43VMVCXMZLOORHG65DJMZUWGYLUNFXW5KTDN5WW2ZLOORPWSZGOVA3YBPA#event-2822209724>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/ABSDOU2FG5M4KJ7NWZW4ZATQU56UXANCNFSM4JQCIIOA> > . >

[haroldrandom]

Reopen and title changed to "Upgrade pip to a newer version when install via curl" to support Python 3.8