code: def parsefield(line, i, n):
      """Separate one key-value pair in a mailcap entry."""
      start = i
      while i < n:
          c = line[i]
          if c == ";":
              break
          elif c == "\\":
              i = i + 2
          else:
              i = i + 1
      return line[start:i].strip(), i
  
file_path: catboost/contrib/tools/python3/src/Lib/mailcap.py
imports: import os
  import warnings
  import re
label_desc: Use image node_id 7 for calling a global function with example usage: parsefield(line, i, n) and returns: line,  i