Testing enhancement: Test `pip install`

@bittner , this is right up your alley so if you’ll feel like doing it, it’ll be cool.

It’ll be nice if after every release, or after every push to master, there will be separate tests that do pip install pysnooper on all platforms and run the tests. This is to rule out any errors in the installation.

[bittner]

@enadol: This behavior is normal on any GNU/Linux system.

PermissionError: [Errno 13] Permission denied: ‘/usr/local/lib/python3.4/dist-packages/pysnooper’

The error says, you - user pi - are not allowed to write in areas that require elevated privileges (read: administrator access, i.e. root). Note that this is fine, it makes it more difficult for attackers that manage to enter your Raspberry Pi via an unprivileged account to do harm to your machine.

On Windows you may be used to work with an administrator-level user. This allows you to install programs anywhere, which makes your system insecure by default.

TL;DR - How install a Python package?

You have two options to install Python packages on GNU/Linux. As a super-user or in your userspace.

$ sudo pip3 install pysnooper

This will prompt you for your user password (and requires the user to be in the sudo group). If sudo is not installed use su and enter the root user’s password:

$ su -c "pip3 install pysnooper"

Installing in your userspace requires no special privileges:

$ pip3 install --user pysnooper

It makes packages available in ~/.local/lib/ and scripts in ~/.local/bin/ (just in case this is not in your PATH by default).

[cool-RR]

@enadol :

1. Please move this to a new issue.
2. Please confirm that you can install other packages via pip, and show the output