在python for循环中获取下一个项目

Question

I have an HTML object that contains a list if an 'X' is found I want to print the x and the next item in the list:

for string in tr[30].strings:
      if string == 'X':
              print(string)
              print(string.next())

Getting error:

TypeError: 'NavigableString' object is not callable

Answer 1

You can use enumerate , example:

strings = tr[30].strings 

for index, string in enumerate(strings):
    if string == 'X':
        print(string)
        print(strings[index + 1])

Answer 2

Try this:

theIterator = iter(tr[30].strings)

for string in theIterator:
      if string == 'X':
              print(string)
              print(next(theIterator))

But be aware that manipulating the iterator of a running for-loop is not recommend.