2018-01-03 Small change and potentially big impact (pandas)
pandas updated its interface in its version 0.22. More particularly v0.22.0 (December 29, 2017),
print(pd.Series([]).sum())
0.0 # It was nan in 0.21.
This is typically the kind of change which could have a huge impact on many functions if you don't have unit tests to capture that. According to the documentation of sum, the previous behaviour can be retrieved by adding min_count=1.
print(pd.Series([]).sum(min_count=1))
nan
And in 10 days, computers might slow down: Kernel-memory-leaking Intel processor design flaw forces Linux, Windows redesign. See also KASLR is Dead: Long Live KASLR.
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Xavier Dupré
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