class_docstr: Calculate the Munkres solution to the classical assignment problem.
  See the module documentation for usage.
docstr: Clear all covered matrix cells
docstr_tok: ["Clear","all","covered","matrix","cells"]
code: def __clear_covers(self):
      """Clear all covered matrix cells"""
      for i in range(self.n):
          self.row_covered[i] = False
          self.col_covered[i] = False
  
imports: import sys
label_desc: Use image node_id 19 for calling the Munkres obj's underlying member method code with example usage: obj.__clear_covers() without return types