Method canonical

Singular/dyn_modules/python/util.py:37–40

(self,var)

  def __init__(self):
    self.mydict={}
  def canonical(self,var):
    while var in self.mydict:
      var=self.mydict[var]
    return var
  def isCanonical(self,var):
    if self.canonical(var)==var:
        return True