from http://seehuhn.de/pages/pdate

Conversion between Unix times and datetime

To convert a Unix time stamp to datetime use the fromtimestamp constructor:

 >>> from datetime import datetime
 >>> datetime.fromtimestamp(1172969203.1)
 datetime.datetime(2007, 3, 4, 0, 46, 43, 100000)

 >>> from datetime import datetime
 >>> from time import mktime
 >>> t=datetime.now()
 >>> mktime(t.timetuple())+1e-6*t.microsecond
 1172970859.472672

My example:

In [26]: d1 = datetime.datetime.now()

In [27]: d1
Out[27]: datetime.datetime(2009, 2, 3, 21, 25, 4, 588232)

In [28]: time.time()
Out[28]: 1233714322.753165

In [29]: time.mktime(d1.timetuple()) + 1e-6 * d1.microsecond
Out[29]: 1233714304.588232

In [30]: 

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My simplistic interpolation scheme was to count the number of contiguous bad source data lines and interpolate that many points over the gap. I got what I planned, but more often than not, the bad source spans many more sample points than bad lines caught.

Now it looks as though I need to do a little analysis on the incoming data to find an average sample rate, and find any spans that are above +/- 1 second of that rate. Then interpolate over the gap, and sample the interpolation at the computed sample interval.

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