Python中既有强制类型转换也有强迫同型，通常使用更多的是前者(“显式优于隐式”)。

Python contains a mixture of casts and coercions, with a usual preference for the former (" explicit is better than implicit ").

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解释类型转换的概念以及隐式和显式转换的不同。

Explains the concept of type conversion and the distinction between implicit and explicit conversion.

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显式构造函数不能参与隐式转换。

An explicit constructor cannot take part in implicit conversions.

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