KeyError: 'warc-target-uri'

[catharsis71]

I have been unable to accomplish anything with this, I always get errors like the following:

$ python2
Python 2.7.18 (default, Mar  8 2021, 13:02:45)
[GCC 9.3.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import warc
>>> f = warc.open("195.242.99.71-8181-2016-03-23-3324e7c6-00001.warc")
>>> for record in f:
...     print record['WARC-Target-URI'], record['Content-Length']
...
Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
  File "/home/username/.local/lib/python2.7/site-packages/warc/warc.py", line 199, in __getitem__
    return self.header[name]
  File "/home/username/.local/lib/python2.7/site-packages/warc/utils.py", line 34, in __getitem__
    return self._d[name.lower()]
KeyError: 'warc-target-uri'
>>>