Question

我正在尝试使用带有pydicom的虚假自定义AN来使登录号匿名：

def an_callback(ds, data_element):
    if data_element.tag == Tag(0x00080050):
        data_element.value = '0000000000'

ds.walk(an_callback)

我想将自定义值而不是“ 0000000”传递给回调函数。我想我可以使用全局变量，但是我想避免这种情况以减少不必要的错误。有没有不使用全局变量的其他方法？

edit：我认为walk是一个特殊的python函数，但这只是ds的一种方法，这是代码。您可以在此处更改回调的代码，使其也包含可选参数。回调（self，data_element，replace_value = None）

def walk(self, callback, recursive=True):
    """Iterate through the DataElements and run `callback` on each.

    Visit all DataElements, possibly recursing into sequences and their
    datasets. The callback function is called for each DataElement
    (including SQ element). Can be used to perform an operation on certain
    types of DataElements. E.g., `remove_private_tags`() finds all private
    tags and deletes them. DataElement`s will come back in DICOM order (by
    increasing tag number within their dataset).

    Parameters
    ----------
    callback
        A callable that takes two arguments:
            * a Dataset
            * a DataElement belonging to that Dataset
    recursive : bool
        Flag to indicate whether to recurse into Sequences.
    """
    taglist = sorted(self.keys())
    for tag in taglist:

        with tag_in_exception(tag):
            data_element = self[tag]
            callback(self, data_element)  # self = this Dataset
            # 'tag in self' below needed in case callback deleted
            # data_element
            if recursive and tag in self and data_element.VR == "SQ":
                sequence = data_element.value
                for dataset in sequence:
                    dataset.walk(callback)

Answer 1

全局变量是最简单的解决方案；如果您想变得更优雅，则可以将该函数封装在某个类中。您的问题涉及普通的Python，因此您可能需要阅读Python Alternatives to Global Variables。

如何在不使用全局变量的情况下将值传递给回调以进行匿名化？

1 个答案: