GBL Notebook Parser is a Python library for parsing and retrieving data from GBL (General Binary Language) notebooks. GBL is a high-level language used by the scientific community for expressing mathematical equations and computational models. The library provides functions for parsing GBL code, extracting data, and converting it into other formats such as JSON or CSV.

To use the GBL Notebook Parser, you need to install it using pip:

```
pip install gbl-notebook-parser
```

Once installed, you can use the library to parse a GBL notebook file and retrieve the desired data. For example, let's say we have a GBL notebook file named "example.gbl" with the following content:

```
# Example notebook
x = 10
y = 20
z = x + y
print(z)
```

To parse this file and retrieve the values of `x` and `y`, you can use the following code:

import gbl_notebook_parser as gnb



# Parse the GBL notebook file

with gnb.GblNotebookParser() as parser:

    parsed = parser.parse("example.gbl")



# Retrieve the values of x and y

x = parsed["variables"]["x"]

y = parsed["variables"]["y"]



# Print the values

print(f"x: {x}, y: {y}")

This code will output:

```
x: 10, y: 20
```

You can also use the library to extract data from different parts of the GBL notebook, such as formulas, variables, and cells. With the help of the GBL Notebook Parser, you can easily work with GBL code in your Python projects.Data retrieval and parsing for GBL Notebook.