Set all string declarations using f-strings

Once Python 3 support is in, we should port string declaration to using f-strings.

f-strings are much easier to read. for example:

>>> name = "Eric"
>>> age = 74
>>> f"Hello, {name}. You are {age}."
'Hello, Eric. You are 74.'

Can be used in function calls:

>>> def to_lowercase(input):
...     return input.lower()

>>> name = "Eric Idle"
>>> f"{to_lowercase(name)} is funny."
'eric idle is funny.'

There are also much faster then %s and str.format()

This would make a line such as the following, much easier to read:

https://github.com/keylime/keylime/blob/d46237141be8585d337518ec95f91953c637afff/test/test_restful.py#L559

More details here: https://www.python.org/dev/peps/pep-0498/

[lukehinds]

Just been thinking about this, the best approach (and easier for you) might be to backup your current repository / work cp -r keylime keylime_fstrings

Go into keylime and switch the master branch, grab the changes and merge them into your repo and push them:

git fetch upstream git merge upstream/master master git push origin master

After that create a new branch:

git checkout -b frstings

Then open two editors, one in keylime and one in keylime_fstrings

In a terminal and the original directory keylime_fstrings with your changes run git status or better still git diff and note your changes. Now copy and paste those changes from your editor showing keylime_fstrings into the editor showing keylime

Once all of that is complete, you can then just push your branch and make a pull request.

For upstream to work in git fetch upstream you will need a .git/config like this:

[core]
	repositoryformatversion = 0
	filemode = true
	bare = false
	logallrefupdates = true
[remote "origin"]
	url = [e-mail]:amylily1011/keylime.git
	fetch = +refs/heads/*:refs/remotes/origin/*
[branch "master"]
	remote = origin
	merge = refs/heads/master
[remote "upstream"]
	url = git://github.com/keylime/keylime.git
	fetch = +refs/heads/*:refs/remotes/upstream/*

[amylily1011]

sounds good! @lukehinds. I’ll block the time 😃