Python 3.5 support for f-strings?

[CarloNicolini]

• nxviz version:
  Development version
• Python version:
  3.5
• Operating System:
  Ubuntu 16.04

Description

Is there any idea to make the f-string syntax of nxviz backcompatible with Python 3.5?
Unfortunately I cannot import it as I get the following error:

>>> import nxviz
File "/home/user/workspace/nxviz/nxviz/plots.py", line 1112
    .encode(alt.X(f'{self.node_lon}:Q',
                                 ^
SyntaxError: invalid syntax

[ericmjl]

@CarloNicolini: thanks for pinging in! Unfortunately, f-strings are a Python 3.6-only feature. I'm unaware of any way to back-port it to 3.5.

As a matter of design, I try to use the latest features of the Python programming language in nxviz, which means only supporting the last two versions of Python. (This is also a common practice with other packages.)