Analysis of Chicory CLI framework technical principles and design ideas
Analysis of Chicory CLI framework technical principles and design ideas
Overview:
Chicory CLI is a framework for building command line interfaces (CLI).It provides a solution to rapidly developing a CLI application, enabling developers to compose the command line tool through simple configuration and code.
Technical principle:
Chicory Cli is developed based on Python programming language and uses the ArgParse library to process command line parameters and options.It uses a modular design to generate executable CLI applications by defining commands and parameters.
Design ideas:
1. Define commands:
Chicory CLI allows developers to build a CLI tool by defining commands and related parameters.Each command corresponds to a function for performing specific functions.By configured command names, parameter options, and description information, various commands can be created flexibly.
2. Analyze the command line parameters:
Chicory CLI uses the ARGPARSE library to analyze the command line parameters and options.It can automatically recognize and parsing the parameters transmitted into Python objects for developers for use.ARGPARSE also supports definition parameters, optional value range, default values, etc. of limited parameters.
3. Registration command:
Chicory CLI provides a command registrar that developers can register define commands through it.The registered command will be automatically added to the executable CLI application, and the user can call these commands by input the command line.The command registry also supports configuration of the description information of the command.
4. Execute command:
When the user enters a specific command in the command line, the Chicory CLI will call the corresponding function to perform specific functions based on the commands and parameters entered by the user.Developers can customize the execution logic of the command according to the need, and implement it by writing the corresponding functions.
Example code and configuration:
The following is an example code and configuration using the Chicory Cli framework to create command line tools:
python
import chicory_cli
from chicory_cli import Command
@Command('hello', 'Say hello to someone')
def say_hello(args):
print('Hello', args.name)
@Command('add', 'Add two numbers')
def add_numbers(args):
result = args.num1 + args.num2
print('Result:', result)
chicory_cli.run()
In the above code, the `Christ_Cli` module was introduced first, and the` Command` decorator was imported from it.Next, two commands are defined through the@Command` decorator: `Hello` and` ADD`.These two commands correspond to the function of `SAY_HELLO` and ADD_NUMBERS`.
`say_hello` Function receives a` args` parameter to process the parameters of the command line.This function prints the input name and a fixed greeting.
`add_numbers` function also receives a` args` parameter to handle parameters transmitted in the command line.This function calculates the sum of the `num1` and` num2`, and print the result.
Finally, run the Chicory CLI application through the `Chicory_cli.run ()` `` It will automatically analyze the command line parameters and perform the corresponding function according to the user's input.
Summarize:
The Chicory CLI framework is written through simple configuration and code to achieve rapid development of command line tools.It is based on the ARGPARSE library to analyze the row parameters and options, and provides command registers to create custom commands.Through Chicory CLI, developers can easily build flexible and powerful command line tools.
