tensorflow学习写程序，iris.data数据，大坑，表现和方法如下：

错误

InvalidArgumentError: Expect 5 fields but have 0 in record 0

[[Node: DecodeCSV = DecodeCSV[OUT_TYPE=[DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_STRING], field_delim=",", na_value="", use_quote_delim=true, _device="/job:localhost/replica:0/task:0/device:CPU:0"](ReaderReadV2:1, DecodeCSV/record_defaults_0, DecodeCSV/record_defaults_0, DecodeCSV/record_defaults_0, DecodeCSV/record_defaults_0, DecodeCSV/record_defaults_4)]]

解决方案