python - 使用 np.genfromtxt() 从文本文件中获取数据受文件中列数的限制？

Question

我正在使用 np.genfromtxt 从文本文件中获取数据，但我无法理解此错误消息：

data = np.genfromtxt('ctr_tr3.txt', skip_header=2, names=True)

a=data['PO4']

Traceback (most recent call last):
  File "C:\EclipseIndigoWorkspace\W2\src\Import.py", line 55, in <module>
    data = np.genfromtxt('ctr_tr3.txt', skip_header=2, names=True)
  File "C:\Python27\lib\site-packages\numpy\lib\npyio.py", line 1560, in genfromtxt
    raise ValueError(errmsg)
ValueError: Some errors were detected !
    Line #4 (got 10 columns instead of 11)
    Line #5 (got 10 columns instead of 11)
    Line #6 (got 10 columns instead of 11)
    Line #7 (got 10 columns instead of 11)
    Line #8 (got 10 columns instead of 11)
    Line #9 (got 10 columns instead of 11)