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这样子发出的数组是output_str[0]='Tx',output_str[1]='Ty'还是output_str[0]='[',output_str[1]='Tx',output_str[2]=',',output_str[3]='Ty',output_str[4]=']'.
当然是[
这个是个字符串啊。
你完全可以print出来自己试试。
