Traceback (most recent call last):
File "e:\编程\一元一次方程组.py", line 26, in
soup = BeautifulSoup(r,'lxml')
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python310\lib\site-packages\bs4_init_.py", line 313, in init
elif len(markup) <= 256 and (
TypeError: object of type 'builtin_function_or_method' has no len()