Project: s41467-024-46027-y | Function: GetHOLE (python)

system: You are an expert Python programmer implementing algorithms from scientific papers.
Complete the masked function based on the algorithm description.
Follow Python best practices and maintain consistent code style.
Return **only** the complete Python function code.

user: Complete this Python function:

**DESCRIPTION:** Processes HOLE analysis output by binning z-coordinates and extracting pore radius values for aquaporin channel analysis

**KEY TERMS:** {
  "holedict": "HOLE analysis output dictionary",
  "edges": "z-coordinate bin edges",
  "frame_z": "z-coordinates per frame",
  "frame_r": "radius values per frame",
  "tot_radius_arr": "binned radius array"
}

**CONTEXT CODE:** import pickle
import numpy as np

def GetHOLE(filename):
	'''
	Processes dictionary outputs from HOLE MDAnalysis by binning the 'z-coord' and find the radius value in that bin
	Args:
		filename (str): name of pickle file containing the HOLE output of a trajectory
	Returns:
		(np.array): shape (number of frames, number of bins) binned radii for each frame in the directory, all of equal length
		saved as a pickle file
	'''
	# MASKED: Processes HOLE analysis output by binning z-coordinates and extracting pore radius values for aquaporin channel analysis implementation
	raise NotImplementedError("This function is masked for testing purposes.")

if __name__ == '__main__':
	import argparse

	ps = argparse.ArgumentParser()
	ps.add_argument('filename', type = str, help = '-HOLE-dict.pkl file input')
	args = ps.parse_args()
	filename = args.filename
	GetHOLE(filename)


Complete the function implementation replacing "raise NotImplementedError".