Python報錯：TypeError: a bytes-like object is required, not ‘str‘
1. 問題
在使用wave進行網路傳輸的過程中出現報錯：TypeError: a bytes-like object is required, not 'str'
2. 原因
主要原因是Python2版本的程式碼在Python3執行。
具體來說，是因為在Python3中字串是Unicode，但在網路傳輸中，資料必須是 bytes strings！
3. 解決
參考：
Python sockets error TypeError: a bytes-like object is required, not ‘str’ with send function
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