hi, i am a new programmer, i have an error, could you help me please?

C:\Programlar\Python36\python.exe C:/Programlar/Denemeler/ozet/run-tests.py
Traceback (most recent call last):
File "C:/Programlar/Denemeler/ozet/run-tests.py", line 9, in
doctest.testfile(file)
File "C:\Programlar\Python36\lib\doctest.py", line 2054, in testfile
encoding or "utf-8")
File "C:\Programlar\Python36\lib\doctest.py", line 223, in _load_testfile
file_contents = file_contents.decode(encoding)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd2 in position 16: invalid continuation byte

Hi is this module is production ready?

I am new to python, but I am working with AI where I work and I am studying programs like yours to improve some processes we have here and understand better. I came with this issue first time I ran run-test.py I've tried python2.7 and python3.7
log-run-test.txt

log-run-test_3.7.txt

import summarize

ss = summarize.SimpleSummarizer()
input = "NLTK is a python library for working human-written text. Summarize is a package 				 
that uses NLTK to create summaries."
ss.summarize(input, 1)

ss.summarize results in this error:

Traceback (most recent call last):
File "SumTest.py", line 5, in
ss.summarize(input, 1)
File "summarize.py", line 75, in summarize
return " ".join(self.get_summarized(input, num_sentences))
File "summarize.py", line 47, in get_summarized
word_frequencies.items()[:100]]
TypeError: 'dict_items' object is not subscriptable