# Filters

<a id="source-filters"></a>

Methods to filter rows without changing the fields values.

## Table Of Contents

* [otp.Source.character_present](https://docs.pip.distribution.sol.onetick.com/api/source/filters/character_present.html.md)
* [otp.Source.dropna](https://docs.pip.distribution.sol.onetick.com/api/source/filters/dropna.html.md)
* [otp.Source.if_else](https://docs.pip.distribution.sol.onetick.com/api/source/filters/if_else.html.md)
* [otp.Source.limit](https://docs.pip.distribution.sol.onetick.com/api/source/filters/limit.html.md)
* [otp.Source.primary_exch](https://docs.pip.distribution.sol.onetick.com/api/source/filters/primary_exch.html.md)
* [otp.Source.skip_bad_tick](https://docs.pip.distribution.sol.onetick.com/api/source/filters/skip_bad_tick.html.md)
* [otp.Source.time_filter](https://docs.pip.distribution.sol.onetick.com/api/source/filters/time_filter.html.md)
* [otp.Source.value_present](https://docs.pip.distribution.sol.onetick.com/api/source/filters/value_present.html.md)
* [otp.Source.where](https://docs.pip.distribution.sol.onetick.com/api/source/filters/where.html.md)
* [otp.Source.where_clause](https://docs.pip.distribution.sol.onetick.com/api/source/filters/where_clause.html.md)