basemax / cfg2cnf

Python program to convert a Context Free Grammar to Chomsky Normal Form.

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 project.

---

Max Base

My nickname is Max, Programming language developer, Full-stack programmer. I love computer scientists, researchers, and compilers. (Max Base)

Asrez Team

A team includes some programmer, developer, designer, researcher(s) especially Max Base.

Asrez Team

cfg2cnf's Issues

is it just me for the program ends with out giving an output?

I can't get ouput!

Hello Dear BaseMax :) after inputting some CFG grammar the program doesn't return anything can you help me?!