[utils] Add try_call

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pukkandan 2022-03-31 13:19:16 +05:30
parent f189faf1ce
commit c4f60dd7cd
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5 changed files with 25 additions and 19 deletions

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@ -643,7 +643,7 @@ ### Use convenience conversion and parsing functions
Use `url_or_none` for safe URL processing.
Use `try_get`, `dict_get` and `traverse_obj` for safe metadata extraction from parsed JSON.
Use `traverse_obj` and `try_call` (superseeds `dict_get` and `try_get`) for safe metadata extraction from parsed JSON.
Use `unified_strdate` for uniform `upload_date` or any `YYYYMMDD` meta field extraction, `unified_timestamp` for uniform `timestamp` extraction, `parse_filesize` for `filesize` extraction, `parse_count` for count meta fields extraction, `parse_resolution`, `parse_duration` for `duration` extraction, `parse_age_limit` for `age_limit` extraction.

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@ -18,7 +18,7 @@
parse_http_range,
sanitized_Request,
ThrottledDownload,
try_get,
try_call,
write_xattr,
XAttrMetadataError,
XAttrUnavailableError,
@ -120,12 +120,12 @@ def establish_connection():
else:
range_end = None
if try_get(None, lambda _: range_start > range_end):
if try_call(lambda: range_start > range_end):
ctx.resume_len = 0
ctx.open_mode = 'wb'
raise RetryDownload(Exception(f'Conflicting range. (start={range_start} > end={range_end})'))
if try_get(None, lambda _: range_end >= ctx.content_len):
if try_call(lambda: range_end >= ctx.content_len):
range_end = ctx.content_len - 1
request = sanitized_Request(url, request_data, headers)

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@ -14,6 +14,7 @@
float_or_none,
mimetype2ext,
str_or_none,
try_call,
try_get,
unescapeHTML,
unsmuggle_url,
@ -145,11 +146,11 @@ def __extract_slides(self, *, stream_id, snum, Stream, duration, images):
'duration': slide['Time'] / 1000,
})
next_time = try_get(None, [
lambda _: Stream['Slides'][i + 1]['Time'],
lambda _: duration,
lambda _: slide['Time'],
], expected_type=(int, float))
next_time = try_call(
lambda: Stream['Slides'][i + 1]['Time'],
lambda: duration,
lambda: slide['Time'],
expected_type=(int, float))
fragments.append({
'path': fname_template.format(slide.get('Number', i + 1)),

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@ -5,6 +5,7 @@
from ..utils import (
int_or_none,
qualities,
try_call,
try_get,
ExtractorError,
)
@ -26,10 +27,10 @@ def _real_extract(self, url):
metadata = self._download_json('https://api.whowatch.tv/lives/%s' % video_id, video_id)
live_data = self._download_json('https://api.whowatch.tv/lives/%s/play' % video_id, video_id)
title = try_get(None, (
lambda x: live_data['share_info']['live_title'][1:-1],
lambda x: metadata['live']['title'],
), compat_str)
title = try_call(
lambda: live_data['share_info']['live_title'][1:-1],
lambda: metadata['live']['title'],
expected_type=str)
hls_url = live_data.get('hls_url')
if not hls_url:

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@ -3096,15 +3096,19 @@ def dict_get(d, key_or_keys, default=None, skip_false_values=True):
return d.get(key_or_keys, default)
def try_get(src, getter, expected_type=None):
for get in variadic(getter):
def try_call(*funcs, expected_type=None, args=[], kwargs={}):
for f in funcs:
try:
v = get(src)
except (AttributeError, KeyError, TypeError, IndexError):
val = f(*args, **kwargs)
except (AttributeError, KeyError, TypeError, IndexError, ZeroDivisionError):
pass
else:
if expected_type is None or isinstance(v, expected_type):
return v
if expected_type is None or isinstance(val, expected_type):
return val
def try_get(src, getter, expected_type=None):
return try_call(*variadic(getter), args=(src,), expected_type=expected_type)
def filter_dict(dct, cndn=lambda _, v: v is not None):