This is to convert a notebook to latex using nbconvert api. Currently not yet exports individual file images. Note the references in resulting tex file also in same folder.

ipy2tex.py

sourcefile = r"../../test.ipynb"  # file to be converted

with open(sourcefile) as nb_file:
    nb_contents = nb_file.read()
    
import nbformat
# Convert using the ordinary exporter
notebook = nbformat.reads(nb_contents, as_version=4)

# create a configuration object to extract figures as files
from traitlets.config import Config
c = Config()
c.LatexExporter.preprocessors = ['nbconvert.preprocessors.ExtractOutputPreprocessor']

# ref: https://nbconvert.readthedocs.io/en/latest/nbconvert_library.html#Quick-overview
# 1. Import the exporter
from nbconvert import LatexExporter

# 2. Instantiate the exporter. 
latex_exporter = LatexExporter(config=c)
latex_exporter.template_file = 'ipy2tex_converter.tplx'

# 3. Process the notebook we loaded earlier
(body, resources) = latex_exporter.from_notebook_node(notebook)

# 4. write the tex file
import ntpath
foldername = ntpath.basename(sourcefile).split('.ipynb')[0]
basename = foldername +'.tex'
with open(basename, 'w') as output_file:
    output_file.write(body)