Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError(': Failed to establish a new connection: Name or service not known',)': /simple/numpy/ Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError(': Failed to establish a new connection: Name or service not known',)': /simple/numpy/ Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError(': Failed to establish a new connection: Name or service not known',)': /simple/numpy/ Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError(': Failed to establish a new connection: Name or service not known',)': /simple/numpy/ Which, is resulting in the following error: Collecting numpy I need to install some libraries (obviously) so I'm trying : pip3 install numpy