Completed the core update to python 3 and move from setup to pyproject.

Moved query_yes_or_no to update_signatures where it was used.
Removed from __future__ import print_function
Removed from __future__ import absolute_import
Removed use of cStringIO and replaced with IO.StringIO
Removed dependency `six`, including `six.moves`, `six.moves.range`, `six.moves.iteritems`, `six.PY2`, `six.urllib`
Removed `importlib_resources`

fido/pronom/http.py → .attic/http.py

@@ -21,6 +21,8 @@
 """
 from six.moves import urllib
 
+# NOTE: from fido/pronom/
+
 
 def get_sig_xml_for_puid(puid):
     """Return the full PRONOM signature XML for the passed PUID."""

fido/__init__.py

@@ -7,42 +7,9 @@
 It is designed for simple integration into automated work-flows.
 """
 
-from __future__ import print_function
-
-from os.path import abspath, dirname, join
-
-from six.moves import input as rinput
-
 __version__ = "1.8.0dev"
 
+# todo: move this to a conf/conf.py or something rather than init.py. Would require some cascading updates, though
+from os.path import abspath, dirname, join
 
 CONFIG_DIR = join(abspath(dirname(__file__)), "conf")
-
-
-def query_yes_no(question, default="yes"):
-    """
-    Ask a yes/no question via input() and return their answer.
-
-    `question` is a string that is presented to the user. `default` is the
-    presumed answer if the user just hits <Enter>. It must be "yes" (the
-    default), "no" or None (meaning an answer is required of the user).
-
-    The "answer" return value is True for "yes" or False for "no".
-    """
-    valid = {"yes": True, "y": True, "no": False, "n": False}
-    if default is None:
-        prompt = " [y/n] "
-    elif default == "yes":
-        prompt = " [Y/n] "
-    elif default == "no":
-        prompt = " [y/N] "
-    else:
-        raise ValueError('Invalid default answer: "%s"' % default)
-    while True:
-        print(question + prompt, end="")
-        choice = rinput().lower()
-        if default is not None and choice == "":
-            return valid[default]
-        if choice in valid:
-            return valid[choice]
-        print('Please respond with "yes" or "no" (or "y" or "n").')