https://github.com/basemax/cfg2cnf
Python program to convert a Context Free Grammar to Chomsky Normal Form.
https://github.com/basemax/cfg2cnf
cfg chomsky cnf context-free context-free-grammar context-free-grammars context-free-language python
Last synced: 8 months ago
JSON representation
Python program to convert a Context Free Grammar to Chomsky Normal Form.
- Host: GitHub
- URL: https://github.com/basemax/cfg2cnf
- Owner: BaseMax
- License: gpl-3.0
- Created: 2020-06-20T11:40:38.000Z (almost 6 years ago)
- Default Branch: master
- Last Pushed: 2025-05-09T03:11:39.000Z (11 months ago)
- Last Synced: 2025-07-19T06:32:12.944Z (9 months ago)
- Topics: cfg, chomsky, cnf, context-free, context-free-grammar, context-free-grammars, context-free-language, python
- Language: Python
- Homepage:
- Size: 257 KB
- Stars: 10
- Watchers: 2
- Forks: 2
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# CFG2CNF
Python tool able to convert a Context Free Grammar in Chomsky Normal Form
## Convert a Context Free Grammar to Chomsky Normal Form
Python program to convert a Context Free Grammar to Chomsky Normal Form.
I read 7 chapters of the book and the result of my study was writing this program.
### References: Formal Languages and Automata
An Introduction to Formal Languages and Automata **by Peter Linz**
#### What is Chomsky Normal Form
Chomsky Normal Form is a context-free grammar that has been put into a specific format. It was developed by Noam Chomsky in 1978 and is part of formal language theory.
https://en.wikipedia.org/wiki/Chomsky_normal_form
#### What is Context Free Grammar
https://en.wikipedia.org/wiki/Context-free_grammar
### Using
```
git clone https://github.com/BaseMax/CFG2CNF
cd CFG2CNF
python main.py
```
### Input
```
S -> SaB | aB
B -> bB | $
*
```
The above grammar is equivalent to the following grammar:
```
S -> SaB
S -> aB
B -> bB
B -> $
*
```
## Automata is useful?
The image below will change your think of the Automata:
Sure, We are need this subject all of the day, Also programming languages!
Follow this way by reading following **book**.
If you find a problem or bugs in program, please send **Issue** or **PR**, i'm a new member in this study...
### Automata Videos
Learn in some videos:
- https://www.youtube.com/watch?v=5_tfVe7ED3g
- https://stackoverflow.com/questions/3510109/how-can-i-determine-if-a-language-is-context-free-or-not#:~:text=First%2C%20you%20should%20attempt%20to,the%20language%20is%20context-free
- https://www.youtube.com/watch?v=mlXYQ8ug2v4&list=PLBlnK6fEyqRgp46KUv4ZY69yXmpwKOIev&index=77
- https://www.youtube.com/watch?v=Mh-UQVmAxnw&list=PLBlnK6fEyqRgp46KUv4ZY69yXmpwKOIev&index=78
- https://www.youtube.com/watch?v=FNPSlnj3Vt0&list=PLBlnK6fEyqRgp46KUv4ZY69yXmpwKOIev&index=79
- https://www.youtube.com/watch?v=ZCbJan6CGNM&list=PLBlnK6fEyqRgp46KUv4ZY69yXmpwKOIev&index=80
- ...
Thanks to Khalilian for providing these videos and the great help he did.
Good for start to check [Mini Calculator Interpreter](https://github.com/BaseMax/MiniCalculatorInterpreter) project.
---------
# Max Base
My nickname is Max, Programming language developer, Full-stack programmer. I love computer scientists, researchers, and compilers. ([Max Base](https://maxbase.org/))
## Asrez Team
A team includes some programmer, developer, designer, researcher(s) especially Max Base.
[Asrez Team](https://www.asrez.com/)