1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
# Copyright 2015 Egor Tensin <Egor.Tensin@gmail.com>
# This file is licensed under the terms of the MIT License.
# See LICENSE.txt for details.
from collections import OrderedDict
import csv
from enum import Enum
import json
import sys
from vk.api import API, Language
from vk.user import UserField
OUTPUT_FIELDS = UserField.UID, UserField.FIRST_NAME, UserField.LAST_NAME
def query_friend_list(api, user):
return api.friends_get(user.get_uid(), fields=OUTPUT_FIELDS)
def extract_output_fields(user):
new_user = OrderedDict()
for field in OUTPUT_FIELDS:
new_user[str(field)] = user[field] if field in user else None
return new_user
class OutputWriterCSV:
def __init__(self, fd=sys.stdout):
self._writer = csv.writer(fd, lineterminator='\n')
def __enter__(self):
return self
def __exit__(self, *args):
pass
def write_mutual_friends(self, friend_list):
for user in mutual_friends:
user = extract_output_fields(user)
self._writer.writerow(user.values())
class OutputWriterJSON:
def __init__(self, fd=sys.stdout):
self._fd = fd
self._array = []
def __enter__(self):
return self
def __exit__(self, *args):
self._fd.write(json.dumps(self._array, indent=3, ensure_ascii=False))
def write_mutual_friends(self, friend_list):
for user in friend_list:
self._array.append(extract_output_fields(user))
class OutputFormat(Enum):
CSV = 'csv'
JSON = 'json'
def __str__(self):
return self.value
def create_writer(self, fd=sys.stdout):
if self is OutputFormat.CSV:
return OutputWriterCSV(fd)
elif self is OutputFormat.JSON:
return OutputWriterJSON(fd)
else:
raise NotImplementedError('unsupported output format: ' + str(self))
if __name__ == '__main__':
import argparse
def output_format(s):
try:
return OutputFormat(s)
except ValueError:
raise argparse.ArgumentError()
parser = argparse.ArgumentParser(
description='Learn who your ex and her new boyfriend are both friends with.')
parser.add_argument(metavar='UID', dest='uids', nargs='+',
help='user IDs or "screen names"')
parser.add_argument('--output-format', type=output_format,
choices=tuple(fmt for fmt in OutputFormat),
default=OutputFormat.CSV,
help='specify output format')
parser.add_argument('--output', type=argparse.FileType('w', encoding='utf-8'),
default=sys.stdout,
help='set output file path (standard output by default)')
args = parser.parse_args()
api = API(Language.EN)
users = api.users_get(args.uids)
friend_lists = map(lambda user: frozenset(query_friend_list(api, user)), users)
mutual_friends = frozenset.intersection(*friend_lists)
with args.output_format.create_writer(args.output) as writer:
writer.write_mutual_friends(mutual_friends)
|
