want to store elements in array or list using python

Question

I am learning python. I want to store one by one element in array or list. this is my code.

for u in durl:
      p2 = requests.get(u)
      tree = html.fromstring(p2.content)
      dcode.append = tree.xpath(ecode)
      print(dcode)

in dcode variable the elements are overriding not appending. i want to insert it one by one. please help me.

Answer 1

append是不是变量的方法，因此，如果您想将tree.xpath(ecode)附加到dcode ，则应编写dcode.append(tree.xpath(ecode))而不是dcode.append =这是一个赋值，而不是方法调用。

Answer 2

tree.xpath(...)返回一个列表，因此，如果要将其与所选元素的现有列表dcode合并，则可以这样做

dcode.extend(tree.xpath(ecode))

Answer 3

You can do it this way, it appends new value to the list and it makes more sense...sort of data structure

def main(decode=[]):
  for u in durl:
      p2 = requests.get(u)
      tree = html.fromstring(p2.content)
      dcode.append(tree.xpath(ecode))
      print(dcode)