Failed to import xgboost in Python3.5

[nyanp]

From xgboost 1.0.0, importing xgboost in Python 3.5 causes an error because of f-strings that is not supported in 3.5.

/opt/hostedtoolcache/Python/3.5.9/x64/lib/python3.5/site-packages/xgboost/dask.py:33: in <module>
    from .sklearn import XGBModel, XGBClassifierBase, xgboost_model_doc
E     File "/opt/hostedtoolcache/Python/3.5.9/x64/lib/python3.5/site-packages/xgboost/sklearn.py", line 437
E       msg = f'Current model type: {type(self).__name__}, ' + \
E                                                          ^
E   SyntaxError: invalid syntax

• xgboost version: 1.0.0 installed from pip
• environment: ubuntu-latest in GitHub CI (link to my CI result)

Is Python3.5 no longer supported from 1.0.0?

[hcho3]

F-string should not have been in there. We will patch it.

[hcho3]

#5330 should fix the issue.

[nyanp]

Thanks for your quick response :)

[hcho3]

I just released 1.0.1, which is identical to 1.0.0 except that 1.0.1 actually supports Python 3.5.

[trivialfis]

Score one for semantic versioning.