再导入csv文件后去逗号遇到问题，去逗号后文件只有最后一行数据，前边好几行的数据...
代码如下：打印出来的只有最后一行数据，其他的数据不见了。>>> data_file = open('C://Users//29016//Desktop//trainingdata//xi11000//target11000.csv','r')
>>> data_list = data_file.readlines()
>>> for record in data_list:
all_values = record.split(',')
>>> print(all_values)
['5.01E-06', '8.10E-08\n']
>>> print(data_list)
>>> print(data_list)
4.74E-06,5.02E-08
>>> for record in data_list:
list1 = record.split(',')
>>> print(list1)
['5.01E-06', '8.10E-08\n']
>>> type(data_list)
<class 'str'>
>>> 依次执行以下代码：
list1 = []
for record in data_list:
list1.append(record.split(','))
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