code: def h(a=0, b=0, c=0, d=0):
      return a + b + c + d
  
imports: import inspect
  from pandas.util._decorators import deprecate_nonkeyword_arguments
  import pandas._testing
label_desc: Use image node_id 15 for calling a global function with example usage: h(a, b, c, d) and returns: unknown