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Initial commit for Python Fire.
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‎CONTRIBUTING.md

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# How to contribute
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We'd love to accept your patches and contributions to this project. There are
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just a few small guidelines you need to follow.
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## Contributor License Agreement
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Contributions to this project must be accompanied by a Contributor License
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Agreement. You (or your employer) retain the copyright to your contribution,
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this simply gives us permission to use and redistribute your contributions as
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part of the project. Head over to <https://cla.developers.google.com/> to see
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your current agreements on file or to sign a new one.
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You generally only need to submit a CLA once, so if you've already submitted one
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(even if it was for a different project), you probably don't need to do it
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again.
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## Code reviews
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All submissions, including submissions by project members, require review. We
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use GitHub pull requests for this purpose. Consult [GitHub Help] for more
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information on using pull requests.
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[GitHub Help]: https://help.github.com/articles/about-pull-requests/

‎LICENSE

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Copyright 2017 Google Inc. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.

‎README.md

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# Python Fire
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_Python Fire is a library for creating command line interfaces (CLIs) from
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absolutely any Python object._
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- Python Fire is a simple way to create a CLI in Python. [[1]](doc/benefits.md#simple-cli)
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- Python Fire is a helpful tool for developing and debugging Python code. [[2]](doc/benefits.md#debugging)
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- Python Fire helps with exploring existing code or turning other people's code
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into a CLI. [[3]](doc/benefits.md#exploring)
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- Python Fire makes transitioning between Bash and Python easier. [[4]](doc/benefits.md#bash)
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- Python Fire makes using a Python REPL easier by setting up the REPL with the
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modules and variables you'll need already imported and created. [[5]](doc/benefits.md#repl)
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## Installation
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`pip install fire`
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## Basic Usage
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You can call `Fire` on any Python object:<br>
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functions, classes, modules, objects, dictionaries, lists, tuples, etc.
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They all work!
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Here's a simple example.
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```python
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import fire
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class Calculator(object):
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"""A simple calculator class."""
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def double(self, number):
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return 2 * number
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if __name__ == '__main__':
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fire.Fire(Calculator)
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```
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Then, from the command line, you can run:
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```bash
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python calculator.py double 10 # 20
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python calculator.py double --number=15 # 30
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```
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To learn how Fire behaves on functions, objects, dicts, lists, etc, and to learn
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about Fire's other features, see the [Using a Fire CLI page](doc/using-cli.md).
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## Why is it called Fire?
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When you call `Fire`, it fires off (executes) your command.
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## Reference
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| Setup | Command | Notes
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| :------ | :------------------ | :---------
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| install | `pip install fire` |
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| Creating a CLI | Command | Notes
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| :--------------| :--------------------- | :---------
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| import | `import fire` |
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| Call | `fire.Fire()` | Turns the current module into a Fire CLI.
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| Call | `fire.Fire(component)` | Turns `component` into a Fire CLI.
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| Using a CLI | Command | Notes
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| :------------- | :------------------------- | :---------
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| [Help](doc/using-cli.md#help-flag) | `command -- --help` |
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| [REPL](doc/using-cli.md#interactive-flag) | `command -- --interactive` | Enters interactive mode.
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| [Separator](doc/using-cli.md#separator-flag) | `command -- --separator=X` | This sets the separator to `X`. The default separator is `-`.
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| [Completion](doc/using-cli.md#completion-flag) | `command -- --completion` | Generate a completion script for the CLI.
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| [Trace](doc/using-cli.md#trace-flag) | `command -- --trace` | Gets a Fire trace for the command.
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| [Verbose](doc/using-cli.md#verbose-flag) | `command -- --verbose` |
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_Note that flags are separated from the Fire command by an isolated `--` arg._
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## Disclaimer
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This is not an official Google product.

‎doc/benefits.md

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# Benefits of Python Fire
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## Python Fire is a simple way to create a CLI in Python. <a name="simple-cli"></a>
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It's dead simple. Simply write the functionality you want exposed at the command
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line as a function / module / class, and then call Fire. With this addition of a
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single-line call to Fire, your CLI is ready to go.
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## Python Fire is a helpful tool for developing and debugging Python code. <a name="debugging"></a>
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When you're writing a Python library, you probably want to try it out as you go.
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You could write a main method to check the functionality you're interested in,
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but then you have to change the main method with every new experiment you're
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interested in testing, and constantly updating the main method is a hassle.
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You could also open an IPython REPL and import your library there and test it,
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but then you have to deal with reloading your imports every time you change
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something.
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If you simply call Fire in your library, then you can run all of it's
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functionality from the command line without having to keep making changes to
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a main method. And if you use the `--interactive` flag to enter an IPython REPL
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then you don't need to load the imports or create your variables; they'll
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already be ready for use as soon as you start the REPL.
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## Python Fire helps with exploring existing code or turning other people's code into a CLI. <a name="exploring"></a>
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You can take an existing module, maybe even one that you don't have access to
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the source code for, and call `Fire` on it. This lets you easily see what
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functionality this code exposes, without you having to read through all the
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code.
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This technique can be a very simple way to create very powerful CLIs. Call
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`Fire` on the difflib library and you get a powerful diffing tool. Call `Fire`
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on the Python Imaging Library (PIL) module and you get a powerful image
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manipulation command line tool, very similar in nature to ImageMagick.
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The auto-generated help strings that Fire provides when you run a Fire CLI
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allow you to see all the functionality these modules provide in a concise
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manner.
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## Python Fire makes transitioning between Bash and Python easier. <a name="bash"></a>
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Using Fire lets you call Python directly from Bash. So you can mix your Python
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functions with the unix tools you know and love, like `grep`, `xargs`, `wc`,
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etc.
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Additionally since writing CLIs in Python requires only a single call to Fire,
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it is now easy to write even one-off scripts that would previously have been in
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Bash, in Python.
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## Python Fire makes using a Python REPL easier by setting up the REPL with the modules and variables you'll need already imported and created. <a name="repl"></a>
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When you use the `--interactive` flag to enter an IPython REPL, it starts with
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variables and modules already defined for you. You don't need to waste time
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importing the modules you care about or defining the variables you're going to
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use, since Fire has already done so for you.

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