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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def __IsInitialized(self):
 """ Returns true if IAM user initialization has completed. """
  
    is_initialized = False
    iam_id = self.GetAccessKeyId()
    if iam_id:
      if core.CirrusAccessIdMetadata(self.s3, iam_id).IsInitialized():
        is_initialized = True
    return is_initialized