[AutoScheduler] Make RecordReader error-free (#8066)
[AutoScheduler] Make RecordReader error-free (#8066)

* fix bugs in the auto scheduler record:

* reformat the code

* reformat the code

* use the os.path.abspath

* change error to warning

* reformat the warning code
Laurawly/tvm-1,Laurawly/tvm-1,dmlc/tvm,dmlc/tvm,dmlc/tvm,Laurawly/tvm-1,Laurawly/tvm-1,dmlc/tvm,Laurawly/tvm-1,dmlc/tvm,Laurawly/tvm-1,Laurawly/tvm-1,dmlc/tvm,dmlc/tvm,Laurawly/tvm-1,Laurawly/tvm-1,dmlc/tvm,dmlc/tvm,Laurawly/tvm-1