On 6 February 2010 at 13:06, Yaroslav Halchenko wrote:
| Hi Laurent and all, all, all,
|
| Does anyone know any RPy2-friendly way to shut R up while I try to load
| libraries? I just want some exception to be through without junk to be
| present on std* ...
|
| here is what I am talking about:
|
| In [3]: rpy2.__version__
| Out[4]: '2.0.8'
|
| so if I do
|
| import rpy2.robjects
| r = rpy2.robjects.r
|
| r.library('glmnet')
|
| I get
|
| Loading required package: Matrix
| Loading required package: lattice
|
| which I do not want to appear under no circumstances (makes doctesting ugly
| etc), so I came up with a dirty hack:
|
| # To shut R up while it is importing libraries to do not ruin out
| # doctests
| r.library = lambda libname: \
| r("suppressMessages(library(%r))" % libname)
|
| and it seems to do its job if library loads fine, but if it doesn't then
| it is ugly again, so following code
|
| # But it becomes really talkative while loading incorrect library
| try:
| r.library('glmnet_bogus')
| except:
| pass
|
| pukes on me
|
| Error in library("glmnet_bogus") :
| there is no package called 'glmnet_bogus'
|
|
| What other approaches I could try?
suppressMessages() is the best wrapper I am aware of. But if a package uses
cat() directly (rather than packageStartupMessage() which responds to
suppressMessages()) then all you can do is
sink("/dev/null")
library(....)
sink()
Or alter the packages -- you have the source for all. I have in the past
(locally) patched packages to suppresses the line noise on startup.
Dirk
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