We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
beetsplug/fromfilename.py python3 compatability
https://github.com/beetbox/beets/blob/e8afcbe7ec4bc37bb080f6f466b98807d020753b/beetsplug/fromfilename.py#L104

python2

``` python2
d.values()
```

for python 3 this should be

``` python3
list(d.values())
```


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `beetsplug/fromfilename.py`
Content:
```
1 # -*- coding: utf-8 -*-
2 # This file is part of beets.
3 # Copyright 2016, Jan-Erik Dahlin
4 #
5 # Permission is hereby granted, free of charge, to any person obtaining
6 # a copy of this software and associated documentation files (the
7 # "Software"), to deal in the Software without restriction, including
8 # without limitation the rights to use, copy, modify, merge, publish,
9 # distribute, sublicense, and/or sell copies of the Software, and to
10 # permit persons to whom the Software is furnished to do so, subject to
11 # the following conditions:
12 #
13 # The above copyright notice and this permission notice shall be
14 # included in all copies or substantial portions of the Software.
15 
16 """If the title is empty, try to extract track and title from the
17 filename.
18 """
19 from __future__ import division, absolute_import, print_function
20 
21 from beets import plugins
22 from beets.util import displayable_path
23 import os
24 import re
25 import six
26 
27 
28 # Filename field extraction patterns.
29 PATTERNS = [
30     # "01 - Track 01" and "01": do nothing
31     r'^(\d+)\s*-\s*track\s*\d$',
32     r'^\d+$',
33 
34     # Useful patterns.
35     r'^(?P<artist>.+)-(?P<title>.+)-(?P<tag>.*)$',
36     r'^(?P<track>\d+)\s*-(?P<artist>.+)-(?P<title>.+)-(?P<tag>.*)$',
37     r'^(?P<track>\d+)\s(?P<artist>.+)-(?P<title>.+)-(?P<tag>.*)$',
38     r'^(?P<artist>.+)-(?P<title>.+)$',
39     r'^(?P<track>\d+)\.\s*(?P<artist>.+)-(?P<title>.+)$',
40     r'^(?P<track>\d+)\s*-\s*(?P<artist>.+)-(?P<title>.+)$',
41     r'^(?P<track>\d+)\s*-(?P<artist>.+)-(?P<title>.+)$',
42     r'^(?P<track>\d+)\s(?P<artist>.+)-(?P<title>.+)$',
43     r'^(?P<title>.+)$',
44     r'^(?P<track>\d+)\.\s*(?P<title>.+)$',
45     r'^(?P<track>\d+)\s*-\s*(?P<title>.+)$',
46     r'^(?P<track>\d+)\s(?P<title>.+)$',
47     r'^(?P<title>.+) by (?P<artist>.+)$',
48 ]
49 
50 # Titles considered "empty" and in need of replacement.
51 BAD_TITLE_PATTERNS = [
52     r'^$',
53     r'\d+?\s?-?\s*track\s*\d+',
54 ]
55 
56 
57 def equal(seq):
58     """Determine whether a sequence holds identical elements.
59     """
60     return len(set(seq)) <= 1
61 
62 
63 def equal_fields(matchdict, field):
64     """Do all items in `matchdict`, whose values are dictionaries, have
65     the same value for `field`? (If they do, the field is probably not
66     the title.)
67     """
68     return equal(m[field] for m in matchdict.values())
69 
70 
71 def all_matches(names, pattern):
72     """If all the filenames in the item/filename mapping match the
73     pattern, return a dictionary mapping the items to dictionaries
74     giving the value for each named subpattern in the match. Otherwise,
75     return None.
76     """
77     matches = {}
78     for item, name in names.items():
79         m = re.match(pattern, name, re.IGNORECASE)
80         if m and m.groupdict():
81             # Only yield a match when the regex applies *and* has
82             # capture groups. Otherwise, no information can be extracted
83             # from the filename.
84             matches[item] = m.groupdict()
85         else:
86             return None
87     return matches
88 
89 
90 def bad_title(title):
91     """Determine whether a given title is "bad" (empty or otherwise
92     meaningless) and in need of replacement.
93     """
94     for pat in BAD_TITLE_PATTERNS:
95         if re.match(pat, title, re.IGNORECASE):
96             return True
97     return False
98 
99 
100 def apply_matches(d):
101     """Given a mapping from items to field dicts, apply the fields to
102     the objects.
103     """
104     some_map = d.values()[0]
105     keys = some_map.keys()
106 
107     # Only proceed if the "tag" field is equal across all filenames.
108     if 'tag' in keys and not equal_fields(d, 'tag'):
109         return
110 
111     # Given both an "artist" and "title" field, assume that one is
112     # *actually* the artist, which must be uniform, and use the other
113     # for the title. This, of course, won't work for VA albums.
114     if 'artist' in keys:
115         if equal_fields(d, 'artist'):
116             artist = some_map['artist']
117             title_field = 'title'
118         elif equal_fields(d, 'title'):
119             artist = some_map['title']
120             title_field = 'artist'
121         else:
122             # Both vary. Abort.
123             return
124 
125         for item in d:
126             if not item.artist:
127                 item.artist = artist
128 
129     # No artist field: remaining field is the title.
130     else:
131         title_field = 'title'
132 
133     # Apply the title and track.
134     for item in d:
135         if bad_title(item.title):
136             item.title = six.text_type(d[item][title_field])
137         if 'track' in d[item] and item.track == 0:
138             item.track = int(d[item]['track'])
139 
140 
141 # Plugin structure and hook into import process.
142 
143 class FromFilenamePlugin(plugins.BeetsPlugin):
144     def __init__(self):
145         super(FromFilenamePlugin, self).__init__()
146         self.register_listener('import_task_start', filename_task)
147 
148 
149 def filename_task(task, session):
150     """Examine each item in the task to see if we can extract a title
151     from the filename. Try to match all filenames to a number of
152     regexps, starting with the most complex patterns and successively
153     trying less complex patterns. As soon as all filenames match the
154     same regex we can make an educated guess of which part of the
155     regex that contains the title.
156     """
157     items = task.items if task.is_album else [task.item]
158 
159     # Look for suspicious (empty or meaningless) titles.
160     missing_titles = sum(bad_title(i.title) for i in items)
161 
162     if missing_titles:
163         # Get the base filenames (no path or extension).
164         names = {}
165         for item in items:
166             path = displayable_path(item.path)
167             name, _ = os.path.splitext(os.path.basename(path))
168             names[item] = name
169 
170         # Look for useful information in the filenames.
171         for pattern in PATTERNS:
172             d = all_matches(names, pattern)
173             if d:
174                 apply_matches(d)
175
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/beetsplug/fromfilename.py b/beetsplug/fromfilename.py
--- a/beetsplug/fromfilename.py
+++ b/beetsplug/fromfilename.py
@@ -101,7 +101,7 @@
     """Given a mapping from items to field dicts, apply the fields to
     the objects.
     """
-    some_map = d.values()[0]
+    some_map = list(d.values())[0]
     keys = some_map.keys()
 
     # Only proceed if the "tag" field is equal across all filenames.

{"golden_diff": "diff --git a/beetsplug/fromfilename.py b/beetsplug/fromfilename.py\n--- a/beetsplug/fromfilename.py\n+++ b/beetsplug/fromfilename.py\n@@ -101,7 +101,7 @@\n     \"\"\"Given a mapping from items to field dicts, apply the fields to\n     the objects.\n     \"\"\"\n-    some_map = d.values()[0]\n+    some_map = list(d.values())[0]\n     keys = some_map.keys()\n \n     # Only proceed if the \"tag\" field is equal across all filenames.\n", "issue": "beetsplug/fromfilename.py python3 compatability\nhttps://github.com/beetbox/beets/blob/e8afcbe7ec4bc37bb080f6f466b98807d020753b/beetsplug/fromfilename.py#L104\n\npython2\n\n``` python2\nd.values()\n```\n\nfor python 3 this should be\n\n``` python3\nlist(d.values())\n```\n\n", "before_files": [{"content": "# -*- coding: utf-8 -*-\n# This file is part of beets.\n# Copyright 2016, Jan-Erik Dahlin\n#\n# Permission is hereby granted, free of charge, to any person obtaining\n# a copy of this software and associated documentation files (the\n# \"Software\"), to deal in the Software without restriction, including\n# without limitation the rights to use, copy, modify, merge, publish,\n# distribute, sublicense, and/or sell copies of the Software, and to\n# permit persons to whom the Software is furnished to do so, subject to\n# the following conditions:\n#\n# The above copyright notice and this permission notice shall be\n# included in all copies or substantial portions of the Software.\n\n\"\"\"If the title is empty, try to extract track and title from the\nfilename.\n\"\"\"\nfrom __future__ import division, absolute_import, print_function\n\nfrom beets import plugins\nfrom beets.util import displayable_path\nimport os\nimport re\nimport six\n\n\n# Filename field extraction patterns.\nPATTERNS = [\n    # \"01 - Track 01\" and \"01\": do nothing\n    r'^(\\d+)\\s*-\\s*track\\s*\\d$',\n    r'^\\d+$',\n\n    # Useful patterns.\n    r'^(?P<artist>.+)-(?P<title>.+)-(?P<tag>.*)$',\n    r'^(?P<track>\\d+)\\s*-(?P<artist>.+)-(?P<title>.+)-(?P<tag>.*)$',\n    r'^(?P<track>\\d+)\\s(?P<artist>.+)-(?P<title>.+)-(?P<tag>.*)$',\n    r'^(?P<artist>.+)-(?P<title>.+)$',\n    r'^(?P<track>\\d+)\\.\\s*(?P<artist>.+)-(?P<title>.+)$',\n    r'^(?P<track>\\d+)\\s*-\\s*(?P<artist>.+)-(?P<title>.+)$',\n    r'^(?P<track>\\d+)\\s*-(?P<artist>.+)-(?P<title>.+)$',\n    r'^(?P<track>\\d+)\\s(?P<artist>.+)-(?P<title>.+)$',\n    r'^(?P<title>.+)$',\n    r'^(?P<track>\\d+)\\.\\s*(?P<title>.+)$',\n    r'^(?P<track>\\d+)\\s*-\\s*(?P<title>.+)$',\n    r'^(?P<track>\\d+)\\s(?P<title>.+)$',\n    r'^(?P<title>.+) by (?P<artist>.+)$',\n]\n\n# Titles considered \"empty\" and in need of replacement.\nBAD_TITLE_PATTERNS = [\n    r'^$',\n    r'\\d+?\\s?-?\\s*track\\s*\\d+',\n]\n\n\ndef equal(seq):\n    \"\"\"Determine whether a sequence holds identical elements.\n    \"\"\"\n    return len(set(seq)) <= 1\n\n\ndef equal_fields(matchdict, field):\n    \"\"\"Do all items in `matchdict`, whose values are dictionaries, have\n    the same value for `field`? (If they do, the field is probably not\n    the title.)\n    \"\"\"\n    return equal(m[field] for m in matchdict.values())\n\n\ndef all_matches(names, pattern):\n    \"\"\"If all the filenames in the item/filename mapping match the\n    pattern, return a dictionary mapping the items to dictionaries\n    giving the value for each named subpattern in the match. Otherwise,\n    return None.\n    \"\"\"\n    matches = {}\n    for item, name in names.items():\n        m = re.match(pattern, name, re.IGNORECASE)\n        if m and m.groupdict():\n            # Only yield a match when the regex applies *and* has\n            # capture groups. Otherwise, no information can be extracted\n            # from the filename.\n            matches[item] = m.groupdict()\n        else:\n            return None\n    return matches\n\n\ndef bad_title(title):\n    \"\"\"Determine whether a given title is \"bad\" (empty or otherwise\n    meaningless) and in need of replacement.\n    \"\"\"\n    for pat in BAD_TITLE_PATTERNS:\n        if re.match(pat, title, re.IGNORECASE):\n            return True\n    return False\n\n\ndef apply_matches(d):\n    \"\"\"Given a mapping from items to field dicts, apply the fields to\n    the objects.\n    \"\"\"\n    some_map = d.values()[0]\n    keys = some_map.keys()\n\n    # Only proceed if the \"tag\" field is equal across all filenames.\n    if 'tag' in keys and not equal_fields(d, 'tag'):\n        return\n\n    # Given both an \"artist\" and \"title\" field, assume that one is\n    # *actually* the artist, which must be uniform, and use the other\n    # for the title. This, of course, won't work for VA albums.\n    if 'artist' in keys:\n        if equal_fields(d, 'artist'):\n            artist = some_map['artist']\n            title_field = 'title'\n        elif equal_fields(d, 'title'):\n            artist = some_map['title']\n            title_field = 'artist'\n        else:\n            # Both vary. Abort.\n            return\n\n        for item in d:\n            if not item.artist:\n                item.artist = artist\n\n    # No artist field: remaining field is the title.\n    else:\n        title_field = 'title'\n\n    # Apply the title and track.\n    for item in d:\n        if bad_title(item.title):\n            item.title = six.text_type(d[item][title_field])\n        if 'track' in d[item] and item.track == 0:\n            item.track = int(d[item]['track'])\n\n\n# Plugin structure and hook into import process.\n\nclass FromFilenamePlugin(plugins.BeetsPlugin):\n    def __init__(self):\n        super(FromFilenamePlugin, self).__init__()\n        self.register_listener('import_task_start', filename_task)\n\n\ndef filename_task(task, session):\n    \"\"\"Examine each item in the task to see if we can extract a title\n    from the filename. Try to match all filenames to a number of\n    regexps, starting with the most complex patterns and successively\n    trying less complex patterns. As soon as all filenames match the\n    same regex we can make an educated guess of which part of the\n    regex that contains the title.\n    \"\"\"\n    items = task.items if task.is_album else [task.item]\n\n    # Look for suspicious (empty or meaningless) titles.\n    missing_titles = sum(bad_title(i.title) for i in items)\n\n    if missing_titles:\n        # Get the base filenames (no path or extension).\n        names = {}\n        for item in items:\n            path = displayable_path(item.path)\n            name, _ = os.path.splitext(os.path.basename(path))\n            names[item] = name\n\n        # Look for useful information in the filenames.\n        for pattern in PATTERNS:\n            d = all_matches(names, pattern)\n            if d:\n                apply_matches(d)\n", "path": "beetsplug/fromfilename.py"}], "after_files": [{"content": "# -*- coding: utf-8 -*-\n# This file is part of beets.\n# Copyright 2016, Jan-Erik Dahlin\n#\n# Permission is hereby granted, free of charge, to any person obtaining\n# a copy of this software and associated documentation files (the\n# \"Software\"), to deal in the Software without restriction, including\n# without limitation the rights to use, copy, modify, merge, publish,\n# distribute, sublicense, and/or sell copies of the Software, and to\n# permit persons to whom the Software is furnished to do so, subject to\n# the following conditions:\n#\n# The above copyright notice and this permission notice shall be\n# included in all copies or substantial portions of the Software.\n\n\"\"\"If the title is empty, try to extract track and title from the\nfilename.\n\"\"\"\nfrom __future__ import division, absolute_import, print_function\n\nfrom beets import plugins\nfrom beets.util import displayable_path\nimport os\nimport re\nimport six\n\n\n# Filename field extraction patterns.\nPATTERNS = [\n    # \"01 - Track 01\" and \"01\": do nothing\n    r'^(\\d+)\\s*-\\s*track\\s*\\d$',\n    r'^\\d+$',\n\n    # Useful patterns.\n    r'^(?P<artist>.+)-(?P<title>.+)-(?P<tag>.*)$',\n    r'^(?P<track>\\d+)\\s*-(?P<artist>.+)-(?P<title>.+)-(?P<tag>.*)$',\n    r'^(?P<track>\\d+)\\s(?P<artist>.+)-(?P<title>.+)-(?P<tag>.*)$',\n    r'^(?P<artist>.+)-(?P<title>.+)$',\n    r'^(?P<track>\\d+)\\.\\s*(?P<artist>.+)-(?P<title>.+)$',\n    r'^(?P<track>\\d+)\\s*-\\s*(?P<artist>.+)-(?P<title>.+)$',\n    r'^(?P<track>\\d+)\\s*-(?P<artist>.+)-(?P<title>.+)$',\n    r'^(?P<track>\\d+)\\s(?P<artist>.+)-(?P<title>.+)$',\n    r'^(?P<title>.+)$',\n    r'^(?P<track>\\d+)\\.\\s*(?P<title>.+)$',\n    r'^(?P<track>\\d+)\\s*-\\s*(?P<title>.+)$',\n    r'^(?P<track>\\d+)\\s(?P<title>.+)$',\n    r'^(?P<title>.+) by (?P<artist>.+)$',\n]\n\n# Titles considered \"empty\" and in need of replacement.\nBAD_TITLE_PATTERNS = [\n    r'^$',\n    r'\\d+?\\s?-?\\s*track\\s*\\d+',\n]\n\n\ndef equal(seq):\n    \"\"\"Determine whether a sequence holds identical elements.\n    \"\"\"\n    return len(set(seq)) <= 1\n\n\ndef equal_fields(matchdict, field):\n    \"\"\"Do all items in `matchdict`, whose values are dictionaries, have\n    the same value for `field`? (If they do, the field is probably not\n    the title.)\n    \"\"\"\n    return equal(m[field] for m in matchdict.values())\n\n\ndef all_matches(names, pattern):\n    \"\"\"If all the filenames in the item/filename mapping match the\n    pattern, return a dictionary mapping the items to dictionaries\n    giving the value for each named subpattern in the match. Otherwise,\n    return None.\n    \"\"\"\n    matches = {}\n    for item, name in names.items():\n        m = re.match(pattern, name, re.IGNORECASE)\n        if m and m.groupdict():\n            # Only yield a match when the regex applies *and* has\n            # capture groups. Otherwise, no information can be extracted\n            # from the filename.\n            matches[item] = m.groupdict()\n        else:\n            return None\n    return matches\n\n\ndef bad_title(title):\n    \"\"\"Determine whether a given title is \"bad\" (empty or otherwise\n    meaningless) and in need of replacement.\n    \"\"\"\n    for pat in BAD_TITLE_PATTERNS:\n        if re.match(pat, title, re.IGNORECASE):\n            return True\n    return False\n\n\ndef apply_matches(d):\n    \"\"\"Given a mapping from items to field dicts, apply the fields to\n    the objects.\n    \"\"\"\n    some_map = list(d.values())[0]\n    keys = some_map.keys()\n\n    # Only proceed if the \"tag\" field is equal across all filenames.\n    if 'tag' in keys and not equal_fields(d, 'tag'):\n        return\n\n    # Given both an \"artist\" and \"title\" field, assume that one is\n    # *actually* the artist, which must be uniform, and use the other\n    # for the title. This, of course, won't work for VA albums.\n    if 'artist' in keys:\n        if equal_fields(d, 'artist'):\n            artist = some_map['artist']\n            title_field = 'title'\n        elif equal_fields(d, 'title'):\n            artist = some_map['title']\n            title_field = 'artist'\n        else:\n            # Both vary. Abort.\n            return\n\n        for item in d:\n            if not item.artist:\n                item.artist = artist\n\n    # No artist field: remaining field is the title.\n    else:\n        title_field = 'title'\n\n    # Apply the title and track.\n    for item in d:\n        if bad_title(item.title):\n            item.title = six.text_type(d[item][title_field])\n        if 'track' in d[item] and item.track == 0:\n            item.track = int(d[item]['track'])\n\n\n# Plugin structure and hook into import process.\n\nclass FromFilenamePlugin(plugins.BeetsPlugin):\n    def __init__(self):\n        super(FromFilenamePlugin, self).__init__()\n        self.register_listener('import_task_start', filename_task)\n\n\ndef filename_task(task, session):\n    \"\"\"Examine each item in the task to see if we can extract a title\n    from the filename. Try to match all filenames to a number of\n    regexps, starting with the most complex patterns and successively\n    trying less complex patterns. As soon as all filenames match the\n    same regex we can make an educated guess of which part of the\n    regex that contains the title.\n    \"\"\"\n    items = task.items if task.is_album else [task.item]\n\n    # Look for suspicious (empty or meaningless) titles.\n    missing_titles = sum(bad_title(i.title) for i in items)\n\n    if missing_titles:\n        # Get the base filenames (no path or extension).\n        names = {}\n        for item in items:\n            path = displayable_path(item.path)\n            name, _ = os.path.splitext(os.path.basename(path))\n            names[item] = name\n\n        # Look for useful information in the filenames.\n        for pattern in PATTERNS:\n            d = all_matches(names, pattern)\n            if d:\n                apply_matches(d)\n", "path": "beetsplug/fromfilename.py"}]}