Pip returns 'SyntaxError: invalid syntax' when in command prompt after being upgraded; how do I fix that? [duplicate] - installation

Question

I am trying to use these steps with bitbucket CI to deploy an application:
script:
- apt-get update
- apt-get install -y python-dev
- curl -O https://bootstrap.pypa.io/get-pip.py
- python get-pip.py
... and a few more steps
However, the python get-pip.py step fails with this error:
Traceback (most recent call last):
File "get-pip.py", line 24226, in <module>
main()
File "get-pip.py", line 199, in main
bootstrap(tmpdir=tmpdir)
File "get-pip.py", line 82, in bootstrap
from pip._internal.cli.main import main as pip_entry_point
File "/tmp/tmpUgc5ng/pip.zip/pip/_internal/cli/main.py", line 60
sys.stderr.write(f"ERROR: {exc}")
^
SyntaxError: invalid syntax
Why isn't it working now? Does it depend on the operating system?
For the equivalent issue with upgrading pip in old Python installations, see Upgrading pip fails with syntax error caused by sys.stderr.write(f"ERROR: {exc}").

Answer 1

pip 21.0 dropped support for Python 2 and 3.5. The later versions require Python 3.6+. The syntax f"" is supported by Python 3.6+.
To install pip for Python 2.7 install it from https://bootstrap.pypa.io/pip/2.7/ :
- curl -O https://bootstrap.pypa.io/pip/2.7/get-pip.py
- python get-pip.py
- python -m pip install --upgrade "pip < 21.0"
The last command is to upgrade to the latest supported version.
For Python 2.7 the latest supported is currently pip 20.3.4.
For Python 3.6 install from https://bootstrap.pypa.io/pip/3.6/
For Python 3.5 install from https://bootstrap.pypa.io/pip/3.5/
For Python 3.4 install from https://bootstrap.pypa.io/pip/3.4/
For Python 3.4 the upgrade command is
python -m pip install --upgrade "pip < 19.2"

Answer 2

I solved it by firstly run
python -m pip install --upgrade "pip < 19.2"
and then
python -m pip install --upgrade "pip < 21.0".
It seems reinstall my pip 20.3.4 and the error disappreared!

Answer 3

This worked for me:On Mac:
Install pyenv as well as upgrade your python following the instructions on this here
Then in your terminal, if you run python -V and you still get the old version(system predefined version) showing:
To resolve this:
In your terminal run: alias python=python3
Then in your terminal execute python and you should now see that your system is using the python version you installed-:That is if you followed and completed the steps Here Correctly.
Restart your terminal(close/reopen):
Now you can finally install pip:
Read more about pip instalation steps [here][3]
1:In your terminal execute :$ python -m ensurepip --upgrade
2: Download the script, from https://bootstrap.pypa.io/get-pip.py.
But..**NB**: instead of navigating to the exact link provided,check out the available versions of pip here: pipversions
Select the latest version:
Then select getpip.py link to get the file and save it into your directory on your machine:
cd into the folder where you saved the newly downloaded script and execute:
Then execute:
python get-pip.py
Pip installed successfully:

Answer 4

For me python 3.5 on aws ec2 below worked
curl -O https://bootstrap.pypa.io/pip/3.5/get-pip.py
Then
sudo python3.5 get-pip.pyenter image description here

Answer 5

I have also tried all thing but my solution was download old get-pip version and install.
download: curl -O https://bootstrap.pypa.io/2.7/get-pip.py the file get-pip.py
install: python get-pip.py or python2 get-pip.py
enjoy
This is worked on Debian systems.
Edit: A better solution is always to install a Python version that is long supported. If at all you need to work with an older version - only then must one resort to the above workaround.

Answer 6

Uninstall existing pip on your machine
Run this cmd in ubuntu or any linux machine
curl https://bootstrap.pypa.io/pip/3.5/get-pip.py -o get-pip.py
python3 get-pip.py
It will work