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[README.md] Mention more convenience extraction functions

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dstftw committed Jan 26, 2019
1 parent ae18d58 commit 252abb1e8b881aa9d3942c436711ac33235b37cd
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@@ -1213,14 +1213,16 @@ Incorrect:
'PLMYEtVRpaqY00V9W81Cwmzp6N6vZqfUKD4'
```

### Use safe conversion functions
### Use convenience conversion and parsing functions

Wrap all extracted numeric data into safe functions from [`youtube_dl/utils.py`](https://github.com/rg3/youtube-dl/blob/master/youtube_dl/utils.py): `int_or_none`, `float_or_none`. Use them for string to number conversions as well.

Use `url_or_none` for safe URL processing.

Use `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.

Explore [`youtube_dl/utils.py`](https://github.com/rg3/youtube-dl/blob/master/youtube_dl/utils.py) for more useful convenience functions.

#### More examples

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