python - 是否可以使用 read_csv 只读取特定行？

Question

我有一个如下所示的 csv 文件:

TEST  
2012-05-01 00:00:00.203 ON 1  
2012-05-01 00:00:11.203 OFF 0  
2012-05-01 00:00:22.203 ON 1  
2012-05-01 00:00:33.203 OFF 0  
2012-05-01 00:00:44.203 OFF 0  
TEST  
2012-05-02 00:00:00.203 OFF 0  
2012-05-02 00:00:11.203 OFF 0  
2012-05-02 00:00:22.203 OFF 0  
2012-05-02 00:00:33.203 OFF 0  
2012-05-02 00:00:44.203 ON 1  
2012-05-02 00:00:55.203 OFF 0  

并且不能去掉 "TEST" 字符串。

是否可以检查一行是否以日期开头并只读取以日期开头的行？

Answer 1

from cStringIO import StringIO
import pandas

s = StringIO()
with open('file.csv') as f:
    for line in f:
        if not line.startswith('TEST'):
            s.write(line)
s.seek(0) # "rewind" to the beginning of the StringIO object

pandas.read_csv(s) # with further parameters…