use pathlib in docs/autogen_shortcuts.py + minor refactor

docs/autogen_shortcuts.py

@@ -1,90 +1,84 b''
-from os.path import abspath, dirname, join
+from pathlib import Path
 
 from IPython.terminal.shortcuts import create_ipython_shortcuts
 
 def name(c):
     s = c.__class__.__name__
     if s == '_Invert':
         return '(Not: %s)' % name(c.filter)
     if s in log_filters.keys():
         return '(%s: %s)' % (log_filters[s], ', '.join(name(x) for x in c.filters))
     return log_filters[s] if s in log_filters.keys() else s
 
 
 def sentencize(s):
     """Extract first sentence
     """
     s = s.replace('\n', ' ').strip().split('.')
     s = s[0] if len(s) else s
     try:
         return " ".join(s.split())
     except AttributeError:
         return s
 
 
 def most_common(lst, n=3):
     """Most common elements occurring more then `n` times
     """
     from collections import Counter
 
     c = Counter(lst)
     return [k for (k, v) in c.items() if k and v > n]
 
 
 def multi_filter_str(flt):
     """Yield readable conditional filter
     """
     assert hasattr(flt, 'filters'), 'Conditional filter required'
     yield name(flt)
 
 
 log_filters = {'_AndList': 'And', '_OrList': 'Or'}
 log_invert =  {'_Invert'}
 
 class _DummyTerminal(object):
     """Used as a buffer to get prompt_toolkit bindings
     """
     handle_return = None
     input_transformer_manager = None
     display_completions = None
 
 ipy_bindings = create_ipython_shortcuts(_DummyTerminal()).bindings
 
 dummy_docs = []  # ignore bindings without proper documentation
 
 common_docs = most_common([kb.handler.__doc__ for kb in ipy_bindings])
 if common_docs:
     dummy_docs.extend(common_docs)
 
 dummy_docs = list(set(dummy_docs))
 
 single_filter = {}
 multi_filter =  {}
 for kb in ipy_bindings:
     doc = kb.handler.__doc__
     if not doc or doc in dummy_docs:
         continue
 
     shortcut = ' '.join([k if isinstance(k, str) else k.name for k in kb.keys])
     shortcut += shortcut.endswith('\\') and '\\' or ''
     if hasattr(kb.filter, 'filters'):
         flt = ' '.join(multi_filter_str(kb.filter))
         multi_filter[(shortcut, flt)] = sentencize(doc)
     else:
         single_filter[(shortcut, name(kb.filter))] = sentencize(doc)
 
 
 if __name__ == '__main__':
+    here = Path(__file__).parent
+    dest = here / 'source' / 'config' / 'shortcuts'
 
-    sort_key = lambda k:(str(k[0][1]),str(k[0][0]))
-
-    here = abspath(dirname(__file__))
-    dest = join(here, 'source', 'config', 'shortcuts')
-
-    with open(join(dest, 'single_filtered.csv'), 'w') as csv:
-        for k, v in sorted(single_filter.items(), key=sort_key):
-            csv.write(':kbd:`{}`\t{}\t{}\n'.format(k[0], k[1], v))
-
-    with open(join(dest, 'multi_filtered.csv'), 'w') as csv:
-        for k, v in sorted(multi_filter.items(), key=sort_key):
-            csv.write(':kbd:`{}`\t{}\t{}\n'.format(k[0], k[1], v))
+    for filters, output_filename in [(single_filter, 'single_filtered'), (multi_filter, 'multi_filtered')]:
+        with (dest / '{}.csv'.format(output_filename)).open('w') as csv:
+            for (shortcut, flt), v in sorted(filters.items(), key=lambda ((shortcut, flt), v): (str(shortcut), str(flt))):
+                csv.write(':kbd:`{}`\t{}\t{}\n'.format(shortcut, flt, v))