Installing pip is not working in python < 3.6

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}").}

stackoverflow.com/q/65866417/7976758, stackoverflow.com/q/65865755/7976758 Found in stackoverflow.com/… — phd
– phd, Commented Jan 24, 2021 at 10:15
@phd Thanks. I'd be glad to accept the answer if you post it. :) — Sagar Acharya
– Sagar Acharya, Commented Jan 24, 2021 at 10:20
To make it a better answer I need to know what Python version do you use? 2.7? — phd
– phd, Commented Jan 24, 2021 at 10:33
@phd Its just used in bitbucket CI not sure about the version. so i presume its 2.7 — Sagar Acharya
– Sagar Acharya, Commented Jan 24, 2021 at 12:54

phd · Accepted Answer · 2022-05-18 13:44:11Z

115

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"

edited May 18, 2022 at 13:44

answered Jan 24, 2021 at 13:31

phd

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12 Comments

Colin Pickard Over a year ago

The upgrade command is not needed, as get-pip.py will install the latest supported version

phd Over a year ago

@ColinPickard I prefer to be: a) explicit; b) to write down a command for future reference if a user would ever want to try to upgrade pip once again.

Shivani Over a year ago

This is fine. But what is the command for 3.5. After downloading from the link?

phd Over a year ago

@Shivani The same as in the post: python get-pip.py

Roy Levy Over a year ago

This does not work for me - pip stays in version 8.1.1 instead of the installed: Successfully installed pip-20.3.4

|

Instein · Accepted Answer · 2021-06-01 03:40:52Z

11

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!

answered Jun 1, 2021 at 3:40

Instein

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3 Comments

su27 Over a year ago

This is quite strange but, yeah it fixed my problem too.

Martin Over a year ago

Same thing happened to me. pip is wonky as hell.

MintMelt Over a year ago

You're a life saver. Installing pip is apparently rocket science, but this works.

RileyManda · Accepted Answer · 2021-11-10 22:27:56Z

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:

diviquery · Accepted Answer · 2021-04-01 03:08:14Z

0

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.

edited Apr 1, 2021 at 3:08

diviquery

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answered Jan 30, 2021 at 17:12

nonnaru 2004

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Comments

Narender · Accepted Answer · 2021-11-11 03:02:32Z

0

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

answered Nov 11, 2021 at 3:02

Narender

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1 Comment

Community Over a year ago

Your answer could be improved with additional supporting information. Please edit to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center.

Wai Ha Lee · Accepted Answer · 2022-06-28 12:13:23Z

-2

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

edited Jun 28, 2022 at 12:13

Wai Ha Lee

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answered Jun 22, 2022 at 18:04

Kalyan Ram Kalipatnapu

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2 Comments

AlexK Over a year ago

As it's currently written, your answer is unclear. Please edit to add additional details that will help others understand how this addresses the question asked and to explain how this answer is different from others already posted. You can find more information on how to write good answers in the help center.

tripleee Over a year ago

This seems to be a restatement of previous answers anyway.

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