1、在python环境下调用函数返回tuple,将结果添加在list
list在循环前为空
2、代码如下:
result=[]
print(type(result))
for i in range(len(urllist)):
print(i)
add=urlget(urllist[i])
print(type(add))
result=result.append(add)
print(type(result))
3、报错信息
0
1
Traceback (most recent call last):
File "C:/Users/123/PycharmProjects/urldownload/urlopentest.py", line 84, in
result=result.append(add)
AttributeError: 'NoneType' object has no attribute 'append'