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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 alias_tool(self, context_name, tool_name, tool_alias):
 """Register an alias for a specific tool. Note that a tool alias takes precedence over a context prefix/suffix. Args: context_name (str):
 Context containing the tool. tool_name (str):
 Name of tool to alias. tool_alias (str):
 Alias to give the tool. """

        data = self._context(context_name)
        aliases = data["tool_aliases"]
        if tool_name in aliases:
            raise SuiteError("Tool %r in context %r is already aliased to %r"
                             % (tool_name, context_name, aliases[tool_name]))
        self._validate_tool(context_name, tool_name)
        aliases[tool_name] = tool_alias
        self._flush_tools()