Python

Python Fire is a library for automatically generating command line interfaces (CLIs) from absolutely any Python object.

Python Fire is a simple way to create a CLI in Python.

Python Fire is a helpful tool for developing and debugging Python code.

Python Fire helps with exploring existing code or turning other people’s code into a CLI.

Python Fire makes transitioning between Bash and Python easier.

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.

快速开始

安装

pip install fire
  • 根据源码安装
python setup.py install

hello world

  • hello.py
import fire

def hello(name):
  return 'Hello {name}!'.format(name=name)

if __name__ == '__main__':
  fire.Fire()
  • 测试
python hello.py hello world
Hello world!

简化调用

  • hello_fn.py
import fire

def hello(name):
  return 'Hello {name}!'.format(name=name)

if __name__ == '__main__':
  fire.Fire(hello)
  • 测试
python .\hello_fn.py world
Hello world!

执行多个方法

多个方法

  • multi_fn.py
import fire

def add(x, y):
  return x + y

def multiply(x, y):
  return x * y

if __name__ == '__main__':
  fire.Fire()
  • 测试
python .\multi_fn.py add 1 2
3

结合对象

  • fire_obj.py
import fire

class Calculator(object):

  def add(self, x, y):
    return x + y

  def multiply(self, x, y):
    return x * y

if __name__ == '__main__':
  calculator = Calculator()
  fire.Fire(calculator)

测试

python fire_obj.py add 1 2
3

结合 class

  • fire_clz.py
import fire

class Calculator(object):

  def add(self, x, y):
    return x + y

  def multiply(self, x, y):
    return x * y

if __name__ == '__main__':
  fire.Fire(Calculator)
  • 测试
python fire_clz.py add 1 2
3

组合多个类

import fire

class IngestionStage(object):

  def run(self):
    print('Ingesting! Nom nom nom...')

class DigestionStage(object):

  def run(self, volume=1):
    print(' '.join(['Burp!'] * volume))

  def status(self):
    print('Satiated.')

class Pipeline(object):

  def __init__(self):
    self.ingestion = IngestionStage()
    self.digestion = DigestionStage()

  def run(self):
    self.ingestion.run()
    self.digestion.run()

if __name__ == '__main__':
  fire.Fire(Pipeline)
  • 测试
> python .\intergration_claz.py run
Ingesting! Nom nom nom...
Burp!
> python .\intergration_claz.py ingestion run
Ingesting! Nom nom nom...
> python .\intergration_claz.py  digestion run
Burp!
  • 个人理解

当我们需要将多个类的行为组合起来的时候，这是一种非常不错的方式。

访问属性

  • access_prop.py
import fire

class Prop(object):
    
    def __init__(self, code):
        __prop_dict = {"A": "Apple", "B": "Box"}
        self.code = code
        self.name = __prop_dict.get(self.code, self.code)

if __name__ == '__main__':
  fire.Fire(Prop)

链式调用

更简单的链式调用。

  • chain_fn.py
import fire

class Chain(object):
    # int var
    __var=1
    
    def add(self, n):
        self.__var+=n
        return self
    
    def show(self):
        print(self.__var)

if __name__ == '__main__':
  fire.Fire(Chain)
  • 测试
> python .\chain_fn.py add 1 add 1 add 1 show
4

参数说明

参数提示怎么处理的？

参考资料

python命令行解析工具

https://www.jianshu.com/p/d3d6e5dfdbe9