是否有可能让 python PyDoc 模块返回包含内容的字符串，而不仅仅是打印它？

Question

The function pydoc.doc() returns None , but i would like to capture the output the function prints, how can i do that using python code?

Answer 1

pydoc.doc has output parameter which should be something supporting .write , you can use io.StringIO for that purpose following way:

import io
import pydoc
f = io.StringIO()
pydoc.doc(object, output=f)
f.seek(0)
objectdoc = f.read()
print(type(objectdoc))
print(objectdoc)

Output:

<class 'str'>
Python Library Documentation: class object in module builtins

class object
 |  The most base type

Note that io.StringIO behaves generally just like file, but is not saved on disk (=is not persistent). I used object as example as its documentation is short.

Answer 2

Create a text buffer for output option of pydoc.doc

import pydoc
from io import StringIO

buffer = StringIO()
pydoc.doc('math.cos', output=buffer)
text = buffer.getvalue()