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
|
# Copyright (c) 2017 Egor Tensin <Egor.Tensin@gmail.com>
# This file is part of the "VK scripts" project.
# For details, see https://github.com/egor-tensin/vk-scripts.
# Distributed under the MIT License.
from contextlib import contextmanager
import csv
import json
import sys
class FileWriterJSON:
def __init__(self, fd=sys.stdout):
self._fd = fd
def write(self, something):
self._fd.write(json.dumps(something, indent=3, ensure_ascii=False))
self._fd.write('\n')
class FileReaderCSV:
def __init__(self, fd=sys.stdin):
self._reader = csv.reader(fd)
def __iter__(self):
return iter(self._reader)
class FileWriterCSV:
def __init__(self, fd=sys.stdout, flush=False):
self._fd = fd
self._writer = csv.writer(fd, lineterminator='\n')
self._flush = flush
@staticmethod
def _convert_row_old_python(row):
if isinstance(row, (list, tuple)):
return row
return list(row)
def write_row(self, row):
if sys.version_info < (3, 5):
row = self._convert_row_old_python(row)
self._writer.writerow(row)
if self._flush:
self._fd.flush()
@contextmanager
def _open_file(path=None, default=None, **kwargs):
if path is None:
yield default
else:
with open(path, **kwargs) as fd:
yield fd
_DEFAULT_ENCODING = 'utf-8'
def open_input_text_file(path=None):
return _open_file(path, default=sys.stdin, mode='r',
encoding=_DEFAULT_ENCODING)
def open_output_text_file(path=None, mode='w'):
return _open_file(path, default=sys.stdout, mode=mode,
encoding=_DEFAULT_ENCODING)
def open_output_binary_file(path=None):
return _open_file(path, default=sys.stdout, mode='wb')
|
