code: def edit_dep_arrow(arrow_html: str) -> str:
      """
      The formatting of a single displacy arrow in svg is the following:
      <g class="displacy-arrow">
          <path class="displacy-arc" id="arrow-c628889ffbf343e3848193a08606f10a-0-0" stroke-width="2px" d="M70,352.0 C70,177.0 390.0,177.0 390.0,352.0" fill="none" stroke="currentColor"/>
          <text dy="1.25em" style="font-size: 0.8em; letter-spacing: 1px">
              <textPath xlink:href="#arrow-c628889ffbf343e3848193a08606f10a-0-0" class="displacy-label" startOffset="50%" side="left" fill="currentColor" text-anchor="middle">csubj</textPath>
          </text>
          <path class="displacy-arrowhead" d="M70,354.0 L62,342.0 78,342.0" fill="currentColor"/>
      </g>
  
      We edit the 'd = ...' parts of the <path class ...> section to fix the arrow direction and length to round to
      the nearest 50 units, centering on each word's center. This is because the words start at x=50 and have spacing
      of 100, so each word is at an x-value that is a multiple of 50.
  
      @param arrow_html: Original SVG for a single displaCy arrow.
      @return: Edited SVG for the displaCy arrow, adjusting its placement
      """
  
      WORD_SPACING = 50  # words start at x=50 and are separated by 100s so their x values are multiples of 50
      M_OFFSET = 4  # length of 'd="M' that we search for to extract the number from d="M70, for instance
      ARROW_PIXEL_SIZE = 4
      first_d_idx, second_d_idx = (
          find_nth(arrow_html, 'd="M', 1),
          find_nth(arrow_html, 'd="M', 2),
      )  # find where d="M starts
      first_d_cutoff, second_d_cutoff = (
          arrow_html.find(",", first_d_idx),
          arrow_html.find(",", second_d_idx),
      )  # isolate the number after 'M' e.g. 'M70'
      # gives svg x values of arrow body starting position and arrowhead position
      arrow_position, arrowhead_position = (
          float(arrow_html[first_d_idx + M_OFFSET : first_d_cutoff]),
          float(arrow_html[second_d_idx + M_OFFSET : second_d_cutoff]),
      )
      # gives starting index of where 'fill="none"' or 'fill="currentColor"' begin, reference points to end the d= section
      first_fill_start_idx, second_fill_start_idx = (
          find_nth(arrow_html, "fill", n=1),
          find_nth(arrow_html, "fill", n=3),
      )
  
      # isolate the d= ... section to edit
      first_d, second_d = (
          arrow_html[first_d_idx:first_fill_start_idx],
          arrow_html[second_d_idx:second_fill_start_idx],
      )
      first_d_split, second_d_split = first_d.split(
          ","
      ), second_d.split(",")
  
      if (
          arrow_position == arrowhead_position
      ):  # This arrow is incoming onto the word, center the arrow/head to word center
          corrected_arrow_pos = corrected_arrowhead_pos = round_base(
              arrow_position, base=WORD_SPACING
          )
  
          # edit first_d  -- arrow body
          second_term = (
              first_d_split[1].split(" ")[0]
              + " "
              + str(corrected_arrow_pos)
          )
          first_d = (
              'd="M'
              + str(corrected_arrow_pos)
              + ","
              + second_term
              + ","
              + ",".join(first_d_split[2:])
          )
  
          # edit second_d  -- arrowhead
          second_term = (
              second_d_split[1].split(" ")[0]
              + " L"
              + str(corrected_arrowhead_pos - ARROW_PIXEL_SIZE)
          )
          third_term = (
              second_d_split[2].split(" ")[0]
              + " "
              + str(corrected_arrowhead_pos + ARROW_PIXEL_SIZE)
          )
          second_d = (
              'd="M'
              + str(corrected_arrowhead_pos)
              + ","
              + second_term
              + ","
              + third_term
              + ","
              + ",".join(second_d_split[3:])
          )
      else:  # This arrow is outgoing to another word, center the arrow/head to that word's center
          corrected_arrowhead_pos = round_base(
              arrowhead_position, base=WORD_SPACING
          )
  
          # edit first_d -- arrow body
          third_term = (
              first_d_split[2].split(" ")[0]
              + " "
              + str(corrected_arrowhead_pos)
          )
          fourth_term = (
              first_d_split[3].split(" ")[0]
              + " "
              + str(corrected_arrowhead_pos)
          )
          terms = [
              first_d_split[0],
              first_d_split[1],
              third_term,
              fourth_term,
          ] + first_d_split[4:]
          first_d = ",".join(terms)
  
          # edit second_d -- arrow head
          first_term = f'd="M{corrected_arrowhead_pos}'
          second_term = (
              second_d_split[1].split(" ")[0]
              + " L"
              + str(corrected_arrowhead_pos - ARROW_PIXEL_SIZE)
          )
          third_term = (
              second_d_split[2].split(" ")[0]
              + " "
              + str(corrected_arrowhead_pos + ARROW_PIXEL_SIZE)
          )
          terms = [
              first_term,
              second_term,
              third_term,
          ] + second_d_split[3:]
          second_d = ",".join(terms)
      # rebuild and return html from its individual sections
      return (
          arrow_html[:first_d_idx]
          + first_d
          + " "
          + arrow_html[first_fill_start_idx:second_d_idx]
          + second_d
          + " "
          + arrow_html[second_fill_start_idx:]
      )
  
imports: import os
  import argparse
  import stanza
  import sys
  from stanza.server.semgrex import Semgrex
  from stanza.models.common.constant import is_right_to_left
  import spacy
  from spacy import displacy
  from spacy.tokens import Doc
  from IPython.display import display, HTML
  import typing
  from typing import List, Tuple, Any
  from utils import find_nth, round_base
label_desc: Use image node_id 7 for calling a global function with example usage: edit_dep_arrow(arrow_html) and returns: unknown