python 不支持复数转换为整数或浮点数
>>> float(4.5+0j) Traceback (most recent call last): File "<pyshell#5>", line 1, in <module> float(4.5+0j) TypeError: can't convert complex to float >>> int(4+0j) Traceback (most recent call last): File "<pyshell#6>", line 1, in <module> int(4+0j) TypeError: can't convert complex to int >>>