code: def get_context(method=None):
      # Try to overload the default context
      method = method or _DEFAULT_START_METHOD or "loky"
      if method == "fork":
          # If 'fork' is explicitly requested, warn user about potential issues.
          warnings.warn(
              "`fork` start method should not be used with "
              "`loky` as it does not respect POSIX. Try using "
              "`spawn` or `loky` instead.",
              UserWarning,
          )
      try:
          return mp_get_context(method)
      except ValueError:
          raise ValueError(
              f"Unknown context '{method}'. Value should be in "
              f"{START_METHODS}."
          )
  
imports: import os
  import sys
  import math
  import subprocess
  import traceback
  import warnings
  import multiprocessing
  from multiprocessing import get_context
  from multiprocessing.context import BaseContext
  from .process import LokyProcess, LokyInitMainProcess
label_desc: Use image node_id 1 for calling a global function with example usage: get_context(method) and returns: mp_get_context