--- a
+++ b/ipynb/notebook2script.py
@@ -0,0 +1,74 @@
+#!/usr/bin/env python
+
+import json,fire,re
+from pathlib import Path
+
+def is_export(cell):
+    if cell['cell_type'] != 'code': return False
+    src = cell['source']
+    if len(src) == 0 or len(src[0]) < 7: return False
+    #import pdb; pdb.set_trace()
+    return re.match(r'^\s*#\s*export\s*$', src[0], re.IGNORECASE) is not None
+
+def getSortedFiles(allFiles, upTo=None):
+    '''Returns all the notebok files sorted by name.
+       allFiles = True : returns all files
+                = '*_*.ipynb' : returns this pattern
+       upTo = None : no upper limit
+            = filter : returns all files up to 'filter' included
+       The sorting optioj is important to ensure that the notebok are executed in correct order.
+    '''
+    import glob
+    ret = []
+    if (allFiles==True): ret = glob.glob('*.ipynb') # Checks both that is bool type and that is True
+    if (isinstance(allFiles,str)): ret = glob.glob(allFiles)
+    if 0==len(ret): 
+        print('WARNING: No files found')
+        return ret
+    if upTo is not None: ret = [f for f in ret if str(f)<=str(upTo)]
+    return sorted(ret)
+
+def notebook2script(fname=None, allFiles=None, upTo=None):
+    '''Finds cells starting with `#export` and puts them into a new module
+       + allFiles: convert all files in the folder
+       + upTo: convert files up to specified one included
+       
+       ES: 
+       notebook2script --allFiles=True   # Parse all files
+       notebook2script --allFiles=nb*   # Parse all files starting with nb*
+       notebook2script --upTo=10   # Parse all files with (name<='10')
+       notebook2script --allFiles=*_*.ipynb --upTo=10   # Parse all files with an '_' and (name<='10')
+    '''
+    # initial checks
+    if (allFiles is None) and (upTo is not None): allFiles=True # Enable allFiles if upTo is present
+    if (fname is None) and (not allFiles): print('Should provide a file name')
+    if not allFiles: notebook2scriptSingle(fname)
+    else:
+        print('Begin...')
+        [notebook2scriptSingle(f) for f in getSortedFiles(allFiles,upTo)]
+        print('...End')
+        
+        
+def notebook2scriptSingle(fname):
+    "Finds cells starting with `#export` and puts them into a new module"
+    fname = Path(fname)
+    fname_out = f'nb_{fname.stem.split("_")[0]}.py'
+    main_dic = json.load(open(fname,'r'))
+    code_cells = [c for c in main_dic['cells'] if is_export(c)]
+    module = f'''
+#################################################
+### THIS FILE WAS AUTOGENERATED! DO NOT EDIT! ###
+#################################################
+# file to edit: dev_nb/{fname.name}
+
+'''
+    for cell in code_cells: module += ''.join(cell['source'][1:]) + '\n\n'
+    # remove trailing spaces
+    module = re.sub(r' +$', '', module, flags=re.MULTILINE)
+    output_path = fname.parent/'../exp'/fname_out
+    print (output_path)
+    open(output_path,'w').write(module[:-2])
+    print(f"Converted {fname} to {output_path}")
+
+if __name__ == '__main__': fire.Fire(notebook2script)
+