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正在转换xml。etree。ElementTree to string引发“TypeError:类型为“int”的参数不可iterable”

elementtree typeerror python

3

Stevoisiak · 技术社区 · 8 年前

我创建了一个简单的XML元素 xml.etree.ElementTree 在Python 3中。

import xml.etree.ElementTree as ElementTree
person = ElementTree.Element("Person", Name="John", Age=18)

我可以使用 Element.get() 从我的元素中访问各个属性,而不会出现任何问题。

name = person.get("Name")
age = person.get("Age")
print(name + " is " + str(age) + " years old.")
# output: "John is 18 years old"

但是,如果我尝试将元素转换为字符串 .tostring() ,我收到一个错误“ TypeError:“int”类型的参数不可iterable “。

print(ElementTree.tostring(person))  # TypeError

为什么我不能使用 。tostring() 在上 xml.etree.ElementTree.Element 是否具有整数属性?

完整代码:

import xml.etree.ElementTree as ElementTree

person = ElementTree.Element("Person", Name="John", Age=18)
print(ElementTree.tostring(person))  # TypeError

完全回溯:

Traceback (most recent call last):
  File "C:\Users\svascellar\AppData\Local\Programs\Python\Python36-32\lib\xml\etree\ElementTree.py", line 1079, in _escape_attrib
    if "&" in text:
TypeError: argument of type 'int' is not iterable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:/Users/svascellar/.PyCharmCE2017.3/config/scratches/scratch_13.py", line 3, in <module>
    print(ElementTree.tostring(person))
  File "C:\Users\svascellar\AppData\Local\Programs\Python\Python36-32\lib\xml\etree\ElementTree.py", line 1135, in tostring
    short_empty_elements=short_empty_elements)
  File "C:\Users\svascellar\AppData\Local\Programs\Python\Python36-32\lib\xml\etree\ElementTree.py", line 776, in write
    short_empty_elements=short_empty_elements)
  File "C:\Users\svascellar\AppData\Local\Programs\Python\Python36-32\lib\xml\etree\ElementTree.py", line 933, in _serialize_xml
    v = _escape_attrib(v)
  File "C:\Users\svascellar\AppData\Local\Programs\Python\Python36-32\lib\xml\etree\ElementTree.py", line 1102, in _escape_attrib
    _raise_serialization_error(text)
  File "C:\Users\svascellar\AppData\Local\Programs\Python\Python36-32\lib\xml\etree\ElementTree.py", line 1057, in _raise_serialization_error
    "cannot serialize %r (type %s)" % (text, type(text).__name__)
TypeError: cannot serialize 18 (type int)

1 回复 | 直到 7 年前

1

7

Stevoisiak 8 年前

尽管 Age 应为数字值,xml属性值应为带引号的字符串:

person = ElementTree.Element("Person", Name="John", Age="18")

或者,如果数据存储为变量,请使用 str()

age = 18
person = ElementTree.Element("Person", Name="John", Age=str(age))