Python 3.8 (3.6-3.7) and pip installation under Windows

[snippsat]

Python 3.8

The installer(since 3.6) is the same for 3.8,here a image with some advice.



Check Windows Path that python and pip work from anywhere in cmd

# Test pip
C:\>pip -V
pip 19.2.3 from c:\python38\lib\site-packages\pip (python 3.8)

# Test Python
C:\Python38>python
Python 3.8.1 (tags/v3.8.1:1b293b6, Dec 18 2019, 22:39:24) [MSC v.1916 32 bit (In
tel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> print(walrus := True)
True
>>>
>>> a = 11
>>> if (b := a) > 10:
...     print(f'The value of b is {b} and greater than 10')
...
The value of b is 11 and greater than 10

>>> exit()

Dos not Windows Path work like this,look at Environment Variables Path,and change to 3.8 location on disk.

Install with pip is the same.

# Install eg Requests
C:\>pip install requests
Collecting requests .....
Successfully installed requests-2.22.0

# Test that Requests work
C:\>python
Python 3.8.1 (tags/v3.8.1:1b293b6, Dec 18 2019, 22:39:24) [MSC v.1916 32 bit (In
tel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import requests
>>>
>>> r = requests.get('http://python-forum.io')
>>> r.status_code
200
>>> r.headers['Date']
'Sat, 08 Feb 2020 19:42:48 GMT'
>>> exit()

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Python 3.7 install last in this thread.

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This is a advice how to install Python and pip under Windows | Part-2
It's advisable to change the long default Path,to a simper Path eg C:\Python36.

Python download.
Choose a executable installer  32-bit or 64-bit.

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Under Customize installation make sure that pip is marked on.

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Here also choose Path C:\Python36

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Finish install.

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Restart

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Testing that python and pip command work from cmd.
Start cmd:

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Microsoft Windows [Version 10.0.14393]
(c) 2016 Microsoft Corporation. Med enerett.
   
C:\Windows\System32>cd\
   
C:\>python
Python 3.6.0 (v3.6.0:41df79263a11, Dec 23 2016, 07:18:10) [MSC v.1900 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()
   
C:\>pip -V
pip 9.0.1 from c:\python36\lib\site-packages (python 3.6)
C:\>

Now that all work,can eg test pip with install of Requests.

C:\>pip install requests
Collecting requests
  Using cached requests-2.13.0-py2.py3-none-any.whl
Installing collected packages: requests
Successfully installed requests-2.13.0

C:\>python
Python 3.6.1 (v3.6.1:69c0db5, Mar 21 2017, 17:54:52) [MSC v.1900 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import requests
>>> r = requests.get('https://www.python.org/')
>>> r.status_code
200
>>> r.encoding
'utf-8'
>>> r.headers['date']
'Tue, 09 May 2017 15:34:57 GMT'

[metulburr]

Would like to add some things.


A lot of people come unfamiliar with using the command prompt and are confused in thinking pip is ran on the python interpreter (ie. >>> prompt), but is ran on the system's command prompt (ie. windows C:\ prompt, linux username@computername ~$).


Also your pip may be out of date.

Quote:pip : You are using pip version 8.1.1, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

This is just a warning. Your package will still install, but it is just warning you that your pip is not current. You can update pip by the command they give you pip install --upgrade pip


You can use pip to upgrade your existing packages

pip install -U youtube-dl

[snippsat]

Python 3.7
Installasjon work the same 3.6.
But the Add Python 3.7 to Path did not overwrite the 3.6 Path,so i had to change Path manually to point to 3.7.
The setup look:


pip is automatically marked on,do not utmark it.

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Fixing Path if needed
For new user the Path to 3.7 should be okay.
Here how to change Environment Variables Path

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Check python and pip
Check that python and pip point to 3.7 from anywhere cmd/cmder.

C:\
λ python -V
Python 3.7.0

C:\
λ pip -V
pip 10.0.1 from c:\python37\lib\site-packages\pip (python 3.7)

python my_scrip.py will use Python 3.7.
pip install something will install to Python 3.7

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Access other versions
All other version installed can be accessed by using py(this is a py.exe that get installed in Path of Windows)

C:\                                                                                                            
λ py -3.6 -V                                                                                                   
Python 3.6.4                                                        
                                                     
C:\                                                                                                            
λ py -2.7 -V                                                                                                   
Python 2.7.9                                                                                                   
                                                                                                               
C:\                                                                                                            
λ # Using pip to install to 2.7                                                                            
λ py -2.7 -m pip install logzero                                                                               
Requirement already satisfied: logzero in c:\python27\lib\site-packages 

[snippsat]

Added info about Python 3.8 at top.