Merge pull request #141 from jiangyi15/fix_same #628

Job	Run time
Build documentation	2m 23s
Unit tests (ubuntu-20.04, 3.7)	15m 54s
conda install latest tensorflow (ubuntu-20.04)	4m 45s
conda install (ubuntu-20.04)	2m 56s
Unit tests (macos-11, 3.7)	34m 32s
Test uproot3 (ubuntu-20.04, 3.7)	15m 33s
Style checks	2m 14s
Unit tests (ubuntu-20.04, 3.6)	14m 18s
Unit tests (ubuntu-20.04, 3.8)	15m 34s
Coverage (ubuntu-20.04, 3.7)	12s
	1h 48m 21s

Provide feedback