can't install pip for python2 in ubuntu20

[GuancongLuo]

Environment

• pip version:
• Python version:2.7.18
• OS:ubuntu20

Description

$python get-pip.py
Traceback (most recent call last):
File "get-pip.py", line 24226, in
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/tmpDqOZwQ/pip.zip/pip/_internal/cli/main.py", line 60
sys.stderr.write(f"ERROR: {exc}")
^
SyntaxError: invalid syntax

Expected behavior

How to Reproduce

1. Get package from '...'
2. Then run '...'
3. An error occurs.

Output

Paste the output of the steps above, including the commands themselves and
pip's output/traceback etc.

[GuancongLuo]

solution:
#9500