code: def calcsize(fmt):
      formatstring, names, fixes = getformat(fmt)
      return struct.calcsize(formatstring)
  
file_path: catboost/contrib/python/fonttools/fontTools/misc/sstruct.py
imports: from fontTools.misc.fixedTools import fixedToFloat, floatToFixed
  from fontTools.misc.textTools import tobytes, tostr
  import struct
  import re
label_desc: Use image node_id 4 for calling a global function with example usage: calcsize(fmt) and returns: struct