Why Does 'python get-pip.py' Fail in Python Versions Before 3.6?

pip Installation Challenges in Python Versions Prior to 3.6

In recent attempts to utilize Bitbucket CI for deploying applications, users have encountered issues when executing the "python get-pip.py" step. This operation fails with a "SyntaxError: invalid syntax" error, leaving users questioning the cause of the malfunction.

The reason for this error lies in the discontinuation of pip support for Python versions 2 and 3.5 with pip version 21.0. Consequently, Python versions 3.6 are now the minimum requirement for pip usage. The syntax "f"" used in the "sys.stderr.write(f""ERROR: {exc}"")" statement is only supported in Python 3.6 and later versions.

Solutions for Different Python Versions:

To effectively install pip in older Python installations, follow the appropriate steps based on the specific Python version being used:

Python 2.7:

• Download the correct pip script from https://bootstrap.pypa.io/pip/2.7/: curl -O https://bootstrap.pypa.io/pip/2.7/get-pip.py
• Install pip: python get-pip.py
• Upgrade pip to the highest supported version: python -m pip install --upgrade "pip < 21.0"

Python 3.6:

• Download the appropriate pip script from https://bootstrap.pypa.io/pip/3.6/: curl -O https://bootstrap.pypa.io/pip/3.6/get-pip.py
• Install pip: python get-pip.py

Python 3.5:

• Download the apt pip script from https://bootstrap.pypa.io/pip/3.5/: curl -O https://bootstrap.pypa.io/pip/3.5/get-pip.py
• Install pip: python get-pip.py

Python 3.4:

• Download the apt pip script from https://bootstrap.pypa.io/pip/3.4/: curl -O https://bootstrap.pypa.io/pip/3.4/get-pip.py
• Install pip: python get-pip.py
• Upgrade pip to the highest supported version (recommended for Python 3.4 only): python -m pip install --upgrade "pip < 19.2"

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