convert()函数传入一个内建函数int(),long(), 或者float()来执行转换:
#!/usr/bin/env python
def convert(func, seq):
'conv. sequence of numbers to same type'
return [func(eachNum) for eachNum in seq]
myseq = (123, 45.67, -6.2e8, 999999999L)
print convert(int, myseq)
print convert(long, myseq)
print convert(float, myseq)输出：
[123, 45, -620000000, 999999999]
[123L, 45L, -620000000L, 999999999L]
[123.0, 45.670000000000002, -620000000.0, 999999999.0]