Interpolate only if single NaN

Question

Is there a way in pandas to interpolate only single missing data points? That is, if there is 2+ consecutive NaN\'s, I\'d like to leave them alone.

so, as an example:

Answer 1

s[(s.shift(-1).notnull()) & (s.shift(1).notnull())] = (s.shift(-1) + s.shift(1))/2

Actually,

s[s.isnull()] = (s.shift(-1) + s.shift(1))/2

works as well, if you are doing simple interpolation.