[Numpy-discussion] annoying Deprecation warnings about non-integers

[josef.pktd at gmail.com]

I'm trying to fix some code in statsmodels that creates Deprecation
Warnings from numpy

Most of it are quite easy to fix, mainly cases where we use floats to avoid
integer division

I have two problems

first, I get Deprecation warnings in the test run that don't specify where
they happen.
I try to find them with file searches, but I don't see a `np.ones` that
might cause a problem
(needle in a haystack: Close to 4000 unittests and more than 100,000 lines
of numpython)
Also, I'm not sure the warnings are only from statsmodels, they could be in
numpy, scipy or pandas, couldn't they?


second, what's wrong with non-integers in `np.r_[[np.nan] * head, x,
[np.nan] * tail]` (see below)

I tried to set the warnings filter to `error` but then Python itself
errored right away.

https://travis-ci.org/statsmodels/statsmodels/jobs/68748936
https://github.com/statsmodels/statsmodels/issues/2480


Thanks for any clues

Josef


>nosetests  -s --pdb-failures --pdb
"M:\j\statsmodels\statsmodels_py34\statsmodels\tsa\tests"

..................C:\WinPython-64bit-3.4.3.1\python-3.4.3.amd64\lib\sit
e-packages\numpy\core\numeric.py:183: DeprecationWarning: using a
non-integer nu
mber instead of an integer will result in an error in the future
  a = empty(shape, dtype, order)
..........


.......M:\j\statsmodels\stat
smodels_py34\statsmodels\tsa\filters\filtertools.py:28: DeprecationWarning:
usin
g a non-integer number instead of an integer will result in an error in the
futu
re
  return np.r_[[np.nan] * head, x, [np.nan] * tail]
..........................


...................C:\WinPython-64bit-3.4.3.1
\python-3.4.3.amd64\lib\site-packages\numpy\lib\twodim_base.py:231:
DeprecationW
arning: using a non-integer number instead of an integer will result in an
error
 in the future
  m = zeros((N, M), dtype=dtype)
C:\WinPython-64bit-3.4.3.1\python-3.4.3.amd64\lib\site-packages\numpy\l
ib\twodim_base.py:238: DeprecationWarning: using a non-integer number
instead of
 an integer will result in an error in the future
  m[:M-k].flat[i::M+1] = 1
...........
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