# Triad
[](https://GitHub.com/fugue-project/triad)
[](https://pypi.python.org/pypi/triad/)
[](https://pypi.python.org/pypi/triad/)
[](https://pypi.python.org/pypi/triad/)
[](https://codecov.io/gh/fugue-project/triad)
[](https://triad.readthedocs.org)
[](https://join.slack.com/t/fugue-project/shared_invite/zt-jl0pcahu-KdlSOgi~fP50TZWmNxdWYQ)
A collection of python utility functions for [Fugue projects](https://github.com/fugue-project)
## Installation
```bash
pip install triad
```
## Release History
### 0.9.6
* Add `is_like` to Schema to compare similar schemas
### 0.9.5
* Add parse json column function to pyarrow utils
* Fix the pandas [legacy usage](https://github.com/fugue-project/triad/issues/127)
### 0.9.4
* Handle Pandas 2.2 change on [arrow string type](https://pandas.pydata.org/docs/dev/whatsnew/v2.2.0.html#other-enhancements)
* Fixed readthedocs build
### 0.9.3
* Add version constraint on fsspec
### 0.9.2
* Remove support for Python 3.7
* Add more util functions for fsspec
* Add more util functions for pyarrow
* Add sorted batch reslicers
* Add `ArrowDtype` support
* Systematically improved pandas and arrow type casts
* Remove `PandasLikeUtils.enfoce_type`
* Add more util functions for pyarrow
### 0.9.1
* Add `fsspec` as a core dependency, add io utils
* Add `py.typed`
* Improve `Schema` class comments
### 0.9.0
* Merge QPD pandas utils functions back to Triad
### 0.8.9
* Add batch reslicers
* Fix package issue (exclude tests folder)
### 0.8.8
* Add type replacement utils for pyarrow
### 0.8.7
* Fix pandas 2.0 warnings
### 0.8.6
* Fixed timestamp conversion for pandas 2.0
### 0.8.5
* Ensure pandas 2.0 compatibility
* Improve `to_schema` in `PandasUtils`
### 0.8.4
* Moved `FunctionWrapper` from Fugue into Triad
* Improved groupby apply efficiency for pandas utils
### 0.8.3
* Add `get_alter_func` to pyarrow utils
### 0.8.2
* Handle time zone in pandas_utils
### 0.8.1
* Fixed the [string column issue](https://github.com/fugue-project/fugue/issues/415)
### 0.8.0
* Support arbitrary column name
### 0.7.0
* Fixed importlib `entry_points` compatibility issue
### 0.6.9
* Remove Python 3.6 support
* Add dataframe rename utils
### 0.6.8
* Add map type support to Schema
### 0.6.7
* Parse nested fields in `expression_to_schema` util
### 0.6.6
* Improve conditional_dispatcher
### 0.6.5
* Add SerializableRLock
* Add decorator run_once
### 0.6.4
* Add function dispatcher
### 0.6.3
* Fix pandas warning on pd.Int64Index
### 0.6.2
* Make ciso8601 totally optional
### 0.6.1
* Support Python 3.10
### 0.6.0
* Fix extensible class bugs
### 0.5.9
* Create `extensible_class` and `extension_method` decos
### 0.5.8
* Make ciso8601 a soft dependency on windows
* Switch to codecov
* Improve documents, change to Furo theme
### 0.5.7
* Fix pandas extension data types bug
### 0.5.6
* Prepare to support [pandas extension data types](https://pandas.pydata.org/docs/user_guide/basics.html#basics-dtypes)
* Support Python 3.9
### 0.5.5
* Change pandas_list enforce_type df construction
### 0.5.4
* Make `FileSystem` work for windows
* Make triad fullly compatible with Windows
* Add windows tests
### 0.5.3
* Lazy evaluation for `assert_or_throw`
### 0.5.2
* For pyarrow data conversion, support np.ndarray -> list
### 0.5.1
* Update get_caller_global_local_vars to access any stack
### 0.5.0
* Fix to_type on full type path
### 0.4.9
* Fix numpy warning
### 0.4.6
* Improve pandas like utils `enforce` method to handle str -> bool
### 0.4.5
* Fixed pandas -> arrow datetime conversion issue
### 0.4.4
* Improved FileSystem compatibility with Windows
* Add overwrite expression for Schema class
* Fixed github actions
### 0.4.3
* Refactored `str_to_type`, `str_to_instance` and `to_function` to use `eval`
### 0.4.2
* Fix a bug in pandas like safe_groupby_apply
### 0.4.1
* Improvement on group by apply
* Improvement on environment setup
### 0.4.0
* Prepare for Fugue open source
### 0.3.8
* Change to Apache 2.0 license
### 0.3.7
* Add pyarrow binary type support
### 0.3.6
* Add `transform` to Schema class
### 0.3.5
* Change pyarrow and pandas type_safe output to be consistent with pyarrow (None for pd.NaT, nan, etc)
### 0.3.4
* Add general FileSystem
### 0.3.3
* Add thread-safe cloudpicklable RunOnce class
### 0.3.2
* extracted TRIAD_DEFAULT_TIMESTAMP as a constant
### <=0.3.1
* Open sourced and docs are ready
* Added basic utility functions
* Types and schema are based on pyarrow
* A better indexed and ordered dict
* Added ParamDict
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"description": "# Triad\n\n[](https://GitHub.com/fugue-project/triad)\n[](https://pypi.python.org/pypi/triad/)\n[](https://pypi.python.org/pypi/triad/)\n[](https://pypi.python.org/pypi/triad/)\n[](https://codecov.io/gh/fugue-project/triad)\n[](https://triad.readthedocs.org)\n\n[](https://join.slack.com/t/fugue-project/shared_invite/zt-jl0pcahu-KdlSOgi~fP50TZWmNxdWYQ)\n\nA collection of python utility functions for [Fugue projects](https://github.com/fugue-project)\n\n## Installation\n\n```bash\npip install triad\n```\n\n\n## Release History\n\n### 0.9.6\n\n* Add `is_like` to Schema to compare similar schemas\n\n### 0.9.5\n\n* Add parse json column function to pyarrow utils\n* Fix the pandas [legacy usage](https://github.com/fugue-project/triad/issues/127)\n\n### 0.9.4\n\n* Handle Pandas 2.2 change on [arrow string type](https://pandas.pydata.org/docs/dev/whatsnew/v2.2.0.html#other-enhancements)\n* Fixed readthedocs build\n\n### 0.9.3\n\n* Add version constraint on fsspec\n\n### 0.9.2\n\n* Remove support for Python 3.7\n* Add more util functions for fsspec\n* Add more util functions for pyarrow\n* Add sorted batch reslicers\n* Add `ArrowDtype` support\n* Systematically improved pandas and arrow type casts\n* Remove `PandasLikeUtils.enfoce_type`\n* Add more util functions for pyarrow\n\n### 0.9.1\n\n* Add `fsspec` as a core dependency, add io utils\n* Add `py.typed`\n* Improve `Schema` class comments\n\n### 0.9.0\n\n* Merge QPD pandas utils functions back to Triad\n\n### 0.8.9\n\n* Add batch reslicers\n* Fix package issue (exclude tests folder)\n\n### 0.8.8\n\n* Add type replacement utils for pyarrow\n\n### 0.8.7\n\n* Fix pandas 2.0 warnings\n\n### 0.8.6\n\n* Fixed timestamp conversion for pandas 2.0\n\n### 0.8.5\n\n* Ensure pandas 2.0 compatibility\n* Improve `to_schema` in `PandasUtils`\n\n### 0.8.4\n\n* Moved `FunctionWrapper` from Fugue into Triad\n* Improved groupby apply efficiency for pandas utils\n\n### 0.8.3\n\n* Add `get_alter_func` to pyarrow utils\n\n### 0.8.2\n\n* Handle time zone in pandas_utils\n\n### 0.8.1\n\n* Fixed the [string column issue](https://github.com/fugue-project/fugue/issues/415)\n\n### 0.8.0\n\n* Support arbitrary column name\n\n### 0.7.0\n\n* Fixed importlib `entry_points` compatibility issue\n\n### 0.6.9\n\n* Remove Python 3.6 support\n* Add dataframe rename utils\n\n### 0.6.8\n\n* Add map type support to Schema\n\n### 0.6.7\n\n* Parse nested fields in `expression_to_schema` util\n\n### 0.6.6\n\n* Improve conditional_dispatcher\n\n### 0.6.5\n\n* Add SerializableRLock\n* Add decorator run_once\n\n### 0.6.4\n\n* Add function dispatcher\n\n### 0.6.3\n\n* Fix pandas warning on pd.Int64Index\n\n### 0.6.2\n\n* Make ciso8601 totally optional\n\n### 0.6.1\n\n* Support Python 3.10\n\n### 0.6.0\n\n* Fix extensible class bugs\n\n### 0.5.9\n\n* Create `extensible_class` and `extension_method` decos\n\n### 0.5.8\n\n* Make ciso8601 a soft dependency on windows\n* Switch to codecov\n* Improve documents, change to Furo theme\n\n### 0.5.7\n\n* Fix pandas extension data types bug\n\n### 0.5.6\n\n* Prepare to support [pandas extension data types](https://pandas.pydata.org/docs/user_guide/basics.html#basics-dtypes)\n* Support Python 3.9\n\n### 0.5.5\n\n* Change pandas_list enforce_type df construction\n\n### 0.5.4\n\n* Make `FileSystem` work for windows\n* Make triad fullly compatible with Windows\n* Add windows tests\n\n### 0.5.3\n\n* Lazy evaluation for `assert_or_throw`\n\n### 0.5.2\n\n* For pyarrow data conversion, support np.ndarray -> list\n\n### 0.5.1\n\n* Update get_caller_global_local_vars to access any stack\n\n### 0.5.0\n\n* Fix to_type on full type path\n\n### 0.4.9\n\n* Fix numpy warning\n\n### 0.4.6\n\n* Improve pandas like utils `enforce` method to handle str -> bool\n\n### 0.4.5\n\n* Fixed pandas -> arrow datetime conversion issue\n\n### 0.4.4\n\n* Improved FileSystem compatibility with Windows\n* Add overwrite expression for Schema class\n* Fixed github actions\n\n### 0.4.3\n\n* Refactored `str_to_type`, `str_to_instance` and `to_function` to use `eval`\n\n### 0.4.2\n\n* Fix a bug in pandas like safe_groupby_apply\n\n### 0.4.1\n\n* Improvement on group by apply\n* Improvement on environment setup\n\n### 0.4.0\n\n* Prepare for Fugue open source\n\n### 0.3.8\n\n* Change to Apache 2.0 license\n\n### 0.3.7\n\n* Add pyarrow binary type support\n\n### 0.3.6\n\n* Add `transform` to Schema class\n\n### 0.3.5\n\n* Change pyarrow and pandas type_safe output to be consistent with pyarrow (None for pd.NaT, nan, etc)\n\n### 0.3.4\n\n* Add general FileSystem\n\n### 0.3.3\n\n* Add thread-safe cloudpicklable RunOnce class\n\n### 0.3.2\n\n* extracted TRIAD_DEFAULT_TIMESTAMP as a constant\n\n### <=0.3.1\n\n* Open sourced and docs are ready\n* Added basic utility functions\n* Types and schema are based on pyarrow\n* A better indexed and ordered dict\n* Added ParamDict\n",
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