pip: sys.stderr.write(f"ERROR: {exc}") with Python 3.5

Question

i am having a trouble with pip and pip3. I am trying to install requirements and it shows an error. When i write pip3 or pip --version it show this error.

jumphost@jumphost-VirtualBox:~$ pip3 --version
Traceback (most recent call last):
  File "/usr/bin/pip3", line 9, in <module>
    from pip import __main__
  File "/usr/local/lib/python3.5/dist-packages/pip/__main__.py", line
21, in <module>
    from pip._internal.cli.main import main as _main
  File
"/usr/local/lib/python3.5/dist-packages/pip/_internal/cli/main.py", line 60
    sys.stderr.write(f"ERROR: {exc}")
                                   ^
SyntaxError: invalid syntax

If i am trying to install, it showed this

jumphost@jumphost-VirtualBox:~/kubespray$ pip install -r requirements.txt
Traceback (most recent call last):
  File "/usr/bin/pip", line 9, in <module>
    from pip import __main__
  File
"/usr/local/lib/python2.7/dist-packages/pip-21.0-py2.7.egg/pip/__main__.py",
line 21, in <module>
    from pip._internal.cli.main import main as _main
  File
"/usr/local/lib/python2.7/dist-packages/pip-21.0-py2.7.egg/pip/_internal/cli/main.py",
line 60
    sys.stderr.write(f"ERROR: {exc}")
                                   ^
SyntaxError: invalid syntax
jumphost@jumphost-VirtualBox:~/kubespray$ pip3 install -r requirements.txt
Traceback (most recent call last):
  File "/usr/bin/pip3", line 9, in <module>
    from pip import __main__
  File "/usr/local/lib/python3.5/dist-packages/pip/__main__.py", line
21, in <module>
    from pip._internal.cli.main import main as _main
  File
"/usr/local/lib/python3.5/dist-packages/pip/_internal/cli/main.py", line 60
    sys.stderr.write(f"ERROR: {exc}")
                                   ^
SyntaxError: invalid syntax

I didn't found a right answer so this is the reason why i ask you. Thanks ! I tried remove python, pip, python3 and pip3 multipletimes but still same problem.

f-strings were introduced in Python 3.6. I'm not sure how, but somehow you managed to break your installation by installing a Python 3.6 pip on your Python 3.5 interpreter — DeepSpace, Feb 15 '21 at 17:54
More correctly: upgrade Python3, and pip dropped Python2 support, AFAIK — OneCricketeer, Feb 15 '21 at 18:01
i removed all pythons via sudo apt-get remove --purge python*** and install python3 and pzthon3-pip and still same error — Tomáš Mejzr, Feb 15 '21 at 18:02
@DeepSpace i'm not sure if this is OP's fault here; I suspect some distros are incorrectly pulling versions of pip that dont' support the given python. — Brad Solomon, Feb 15 '21 at 18:04
You cannot purge Python completely because it's an OS requirement. And depending on your ubuntu version, Python 3.6+ is not immediately available via apt; you need to add a PPA (or install miniconda3) — OneCricketeer, Feb 15 '21 at 18:06

Brad Solomon · Accepted Answer · 2021-10-18T16:35:36.740

45

pip has dropped support for Python 2 and 3.5. You will need to use a version-specific branch, assuming that your Python version is 3.5:

curl -fsSL https://bootstrap.pypa.io/pip/3.5/get-pip.py | python3.5

get-pip.py reference: https://pip.pypa.io/en/stable/installing/#installing-with-get-pip-py

Related: How can I install a legacy PIP version with python 2.6.6 or python 2.7.5?

Better yet, as suggested in the comments, install a newer version of Python that is not end-of-life.

edited Oct 18 '21 at 16:35

answered Feb 15 '21 at 18:01

Brad Solomon

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lifesaver great – Evalds Urtans Jul 24 '23 at 21:00

pip: sys.stderr.write(f"ERROR: {exc}") with Python 3.5

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