python数据类型转换

>>> int(2.1) 2 >>> int(2.9) 2 >>> int('23') 23 >>> str(23) '23' >>> str(23.4) '23.4' >>> float(23) 23.0 >>> float('2.34') 2.34 >>> int('a') Traceback (most recent call last): File "<stdin>", line 1,

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