Fix python ut with wrong format and precision (#2225)
Fix python ut with wrong format and precision (#2225)

* fix

* more fix

* support conda env

* update

yangw1234/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,yangw1234/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,yangw1234/BigDL,yangw1234/BigDL