Traceback (most recent call last):


 "path_to_my_script/script.py", line 30, in <module>

QueryStrategy(dataset).make_query() # declare a QueryStrategy instance
TypeError: Can't instantiate abstract class QueryStrategy with abstract methods make_query

Traceback (most recent call last):


 "/Users/william/Programming/Python/mytest/rpytest.py", line 3, in <module>

for word, flag in words:
TypeError: cannot unpack non-iterable pair object
