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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 can_view(self, user):
 """Return true if the user can view the file."""

        # Perform simplest checks first
        if user.is_admin or self in user.files:
            return True
        elif user.admin_for:  # Begin more expensive comparisions
            # Single-indirect lookup
            classes = set(x.class_ for x in self.makefile_for_projects)
            if classes.intersection(user.admin_for):
                return True
            # Double indirect lookups
            classes = set(x.project.class_ for x in self.build_files)
            if classes.intersection(user.admin_for):
                return True
            classes = set(x.project.class_ for x in self.execution_files)
            if classes.intersection(user.admin_for):
                return True
            # Triple-indirect lookups
            classes = set(x.testable.project.class_ for x in self.expected_for)
            if classes.intersection(user.admin_for):
                return True
            classes = set(x.testable.project.class_ for x in self.stdin_for)
            if classes.intersection(user.admin_for):
                return True
            classes = set(x.submission.project.class_ for x in
                          self.submission_assocs)
            if classes.intersection(user.admin_for):
                return True
            # 4x-indirect lookups
            classes = set(x.test_case.testable.project.class_ for x
                          in self.test_case_result_for)
            if classes.intersection(user.admin_for):
                return True
        return False