ERROR: Could not find a version that satisfies the requirement pyttst3 (from versions: none) ERROR

ERROR: Could not find a version that satisfies the requirement pyttst3 (from versions: none)
ERROR: No matching distribution found for pyttst3

在做Python语音的时候，产生了这个错误，其实是因为教程当中包的名称错了，那个是pyttsx3, 不是pyttst3
改过来就OK啦
ERROR: Could not find a version that satisfies the requirement pyttst3 (from versions: none) ERROR

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