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[snippsat]

A quick look at Python Fire.
It's kind of cool,it simplify it down bye using some magic.

I want to start with the class and use it in a normal way.

class Calculator:
   """A simple calculator class."""

   def double(self, number):
       return 2 * number

if __name__ == '__main__':
     obj = Calculator()
     print(obj.double(5))
     print(obj.double(4.6))
     print(obj.double('hello'))

Output:
10
9.2
hellohello

So the normal way,instance of the class and assigns to variable obj.
Use method object "obj" and call method double.

---

Now the same using fire.

# fire_class.py
import fire

class Calculator:
    """A simple calculator class."""

    def double(self, number):
        return 2 * number

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

From command line:

Output:
λ python fire_class.py double 5
10
λ python fire_class.py double 4.6
9.2
λ python fire_class.py double hello
hellohello

λ python fire_class.py -- --help
Type:        type
String form: <class '__main__.Calculator'>
File:        c:\python36\web_scrape\fire_class.py
Line:        4
Docstring:   A simple calculator class.
Usage:       fire_class.py

So file name fire_class.py is acting like the method object "obj".
So we can use the class in same way as in first example.

---

Using a function.

# fire_func.py
import fire

def hello(name):
   return f'Hello {name}!☂'   

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

From command line:

Output:
λ python fire_func.py outside
Hello outside!☂

So will *args work so we can give many argument in

# fire_arg.py
import fire

def hello(*args):
    return f'Hello {args}!☂'

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

From command line:

Output:
λ python fire_arg.py i am from outside and want in
Hello ('i', 'am', 'from', 'outside', 'and', 'want', 'in')!☂

---

Other stuff eg --interactive
From command line:

Output:
λ python fire_class.py -- --interactive
Fire is starting a Python REPL with the following objects:
Modules: fire
Objects: Calculator, component, fire_class.py, result, trace

Python 3.6.0 (v3.6.0:41df79263a11, Dec 23 2016, 07:18:10) [MSC v.1900 32 bit (Intel)]
Type "copyright", "credits" or "license" for more information.

IPython 5.3.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]:

So it start a IPython interactive shell.