Merge pull request #148 from jiangyi15/identical_way #647

Job	Run time
conda install latest tensorflow (ubuntu-20.04)	4m 12s
Build documentation	2m 16s
Unit tests (ubuntu-20.04, 3.7)	17m 28s
conda install (ubuntu-20.04)	2m 41s
Unit tests (macos-11, 3.7)	38m 12s
Test uproot3 (ubuntu-20.04, 3.7)	15m 53s
Unit tests (ubuntu-20.04, 3.6)	14m 36s
Style checks	2m 53s
Unit tests (ubuntu-20.04, 3.8)	15m 56s
Coverage (ubuntu-20.04, 3.7)	41s
	1h 54m 48s

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