python - GDCM python DICOM解压

Question

我执行了这个python script 。线路发生错误

t = gdcm.Orientation.GetType(dircos)

错误信息为:

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/IPython/core/interactiveshell.py", line 2820, in run_code
    exec code_obj in self.user_global_ns, self.user_ns
  File "<ipython-input-8-fb43b0929780>", line 1, in <module>
    gdcm.Orientation.GetType(dircos)
TypeError: expected a list.

我查了一下classes reference 。它说

Input is an array of 6 double

变量dircos正是一个包含6个元素的列表，

>>> dircos
Out[11]: [1.0, 0.0, 0.0, 0.0, 1.0, 0.0]

不知道为什么会出错。

Answer 1

我检查了源代码，发现它实际上检查了tuple。该消息具有误导性。

// Grab a 6 element array as a Python 6-tuple
%typemap(in) const double dircos[6] (double temp[6]) {   // temp[6] becomes a local variable
  int i;
  if (PyTuple_Check($input) /*|| PyList_Check($input)*/) {
    if (!PyArg_ParseTuple($input,"dddddd",temp,temp+1,temp+2,temp+3,temp+4,temp+5)) {
      PyErr_SetString(PyExc_TypeError,"list must have 6 elements");
      return NULL;
    }
    $1 = &temp[0];
  } else {
    PyErr_SetString(PyExc_TypeError,"expected a list.");
    return NULL;
  }
}

您需要传递一个元组:

>>> import gdcm
>>> dircos = [1.0, 0.0, 0.0, 0.0, 1.0, 0.0]
>>> gdcm.Orientation.GetType(tuple(dircos))
1