Compact Python library for math statistics

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I'm looking for a Python library for math statistics. This must be a clear set of general statistics functions like 'average', 'variance', 'covariance' etc.

While googling I found only SalStat, which is rather stand-alone application with GUI on wxWidgets, and I need time and efforts to extract the core engine from it. Apart from this, it does not do some essential things for me, such as multi-component linear regression (y = a0 + a1 x1 + a2 x2 +...), only single-component (y = a0 + a1 x) is available.

Does anyone know something more simple-to-use? Something like

>> from stat import *
>> a = [1, 2, 3, 4, 5, 6]
>> print ave(a), var(a), correl(a, a)
3.5 17.3 1.0

Thanks in advance

I started write something like for me for my own uses. Is it useful to publish it?
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