We Keep Coding

ERROR: Could not find a version that satisfies the requirement PyDispatcher-2.0.5 (from versions: none) [duplicate]

Python 3.9.5 Here I go:
deactivate
rm -rf venv/
python -m venv venv
source venv/bin/activate
python -V
python -m pip install --upgrade pip
python -m pip install wheel
fine.
look at the development.txt:
mariadb==1.0.5
python-binance==1.0.10
python-decouple==3.3
PyMySQL==0.10.1
mplfinance==0.12.7a4
newtulipy==0.4.6
autobahn==21.3.1
PyQt6==6.1.1
pyqtgraph==0.12.1
PyOpenGL==3.1.5
PyDispatcher-2.0.5
shortuuid==1.0.1
try this: development.txt (has is PyDispatcher==2.0.5).
Try this for your self:
python -m pip install -r requirements/development.txt
ERROR: Could not find a version that satisfies the requirement PyDispatcher-2.0.5 (from versions: none)
ERROR: No matching distribution found for PyDispatcher-2.0.5
Why?
But on his own:
pip install PyDispatcher
Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: PyDispatcher in /home/jonsl/.local/lib/python3.9/site-packages (2.0.5)
Is fine.
Why?
Thank you people.

Turns out that:
pyqtgraph==0.12.1
needs
pyqtgraph==0.12.2
instead with:
PyQt6==6.1.1
Also, never use from ... import ... unless you need.

pip install --upgrade gives the same warning

Successfully installed pip-21.0.1
WARNING: You are using pip version 20.2.1; however, version 21.0.1 is available.
Full trace
$ /usr/bin/python3 -m pip install --upgrade pip
Defaulting to user installation because normal site-packages is not writeable
Collecting pip
Downloading pip-21.0.1-py3-none-any.whl (1.5 MB)
|████████████████████████████████| 1.5 MB 19.7 MB/s
Installing collected packages: pip
WARNING: The scripts pip, pip3 and pip3.6 are installed in '/home/ubuntu/.local/bin' which is not on PATH.
Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed pip-21.0.1
WARNING: You are using pip version 20.2.1; however, version 21.0.1 is available.
You should consider upgrading via the '/usr/bin/python3 -m pip install --upgrade pip' command.
Despite upgrading why does it give the warning?

You don't have write permission to do the site-package upgrade re site-packages is not writeable. You can run it with sudo if you wish, although for a Debian based distribution it would be more appropriate to leave package managed files alone.
And you are not using the local version you installed re `'/home/ubuntu/.local/bin' which is not on PATH`.
To do this,
export PATH=$PATH:/home/ubuntu/.local/bin

Use sudo /usr/bin/python3 -m pip install --upgrade pip

want to install python -m pip install pyautogui===0.9.39 but am facing this [duplicate]

I'm using mac os mojave, install python 2.7 and install pip using python get-pip.py, I already try those command to install pip :
pip install --upgrade pip
pip install nltk
and try
sudo python -m pip install --upgrade nltk
But also result to same error like in this image
Or here in text:
error in nltk setup command: 'install_requires' must be a string or
list of strings containing valid project/version requirement
specifiers; Expected version spec in singledispatch; python_version <
"3.4" at ; python_version < "3.4"
Is it because my python version (2.7) ? But in pip ntlk page it says also support 2.7
update:
pip install nltk success after running :
pip install --upgrade setuptools pip --user

Start with upgrading installation tools:
pip install --upgrade setuptools pip

How to Update/Install python

I want to install pip on my windows but I get an error saying
ERROR: Could not find a version that satisfies the requirement pip
(from versions: none)
ERROR: No matching distribution found for pip

First check pip version by using the following command then upgrade
pip --version
pip install --upgrade pip
this will upgrade pip version

Pip has 2 versions, what should I do?

So i really don't know what to do. I am confused. I am also using a virtual environment named PyCharm. There are many issues with pip there but I haven't seen anything as weird as this.
cmd output:
C:\Users\Artur\PycharmProjects\first\venv\Scripts>pip install time
Collecting time
Could not find a version that satisfies the requirement time (from versions: )
No matching distribution found for time
You are using pip version 10.0.1, however version 19.0.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.
C:\Users\Artur\PycharmProjects\first\venv\Scripts>python -m pip install --upgrade pip
Requirement already up-to-date: pip in c:\users\artur\pycharmprojects\first\venv\lib\site-packages (19.0.1)
C:\Users\Artur\PycharmProjects\first\venv\Scripts>pip install time
Collecting time
Could not find a version that satisfies the requirement time (from versions: )
No matching distribution found for time
You are using pip version 10.0.1, however version 19.0.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

To resolving your outdated pip in PyCharm by running this in your PyCharm terminal:
python -m pip install -U --force-reinstall pip
This will fix the warning you are receiving...You are using pip version 10.0.1, however version 19.0.1 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command.