remove unused imports, minor formatting cleanup

bin/autojump

@@ -22,13 +22,11 @@
 from __future__ import print_function
 
 from difflib import SequenceMatcher
-from functools import partial
 from itertools import chain
 from math import sqrt
 from operator import attrgetter
 from operator import itemgetter
 import os
-import platform
 import re
 import sys
 
@@ -61,7 +59,6 @@ from utils import last
 from utils import print_entry
 from utils import print_tab_menu
 from utils import sanitize
-from utils import second
 from utils import surround_quotes
 from utils import take
 
@@ -142,7 +139,7 @@ def add_path(data, path, increment=10):
         return data, Entry(path, 0)
 
     if path in data:
-        data[path] = sqrt((data[path]**2) + (increment**2))
+        data[path] = sqrt((data[path] ** 2) + (increment ** 2))
     else:
         data[path] = increment
 
@@ -152,7 +149,7 @@ def add_path(data, path, increment=10):
 def decrease_path(data, path, increment=15):
     """Decrease weight of existing path."""
     path = decode(path).rstrip(os.sep)
-    data[path] = max(0, data[path]-increment)
+    data[path] = max(0, data[path] - increment)
     return data, Entry(path, data[path])
 
 
@@ -212,7 +209,10 @@ def match_anywhere(needles, haystack, ignore_case=False):
     """
     regex_needle = '.*' + '.*'.join(needles) + '.*'
     regex_flags = re.IGNORECASE | re.UNICODE if ignore_case else re.UNICODE
-    found = lambda haystack: re.search(regex_needle, haystack.path, flags=regex_flags)
+    found = lambda haystack: re.search(
+            regex_needle,
+            haystack.path,
+            flags=regex_flags)
     return ifilter(found, haystack)
 
 
@@ -289,8 +289,7 @@ def match_fuzzy(needles, haystack, ignore_case=False):
         match_percent = lambda entry: SequenceMatcher(
                 a=needle,
                 b=end_dir(entry.path)).ratio()
-    meets_threshold = lambda entry: match_percent(entry) \
-            >= FUZZY_MATCH_THRESHOLD
+    meets_threshold = lambda entry: match_percent(entry) >= FUZZY_MATCH_THRESHOLD
     return ifilter(meets_threshold, haystack)
 
 
@@ -344,7 +343,7 @@ def main(args):
         old_data = load(config)
         new_data = dictify(purge_missing_paths(entriefy(old_data)))
         save(config, new_data)
-        print("Purged %d entries." % (len(old_data)-len(new_data)))
+        print("Purged %d entries." % (len(old_data) - len(new_data)))
     elif args.stat:
         print_stats(load(config), config['data_path'])
     else: