Bug #24003

Python2 Print Syntax in

Added by Ryan Lazur about 1 year ago. Updated about 1 year ago.

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I just built icaruscode v08_41_00 and I can no longer use to launch grid jobs. The errors are related to the print statements in that have the ancient python2 syntax (no parenthesis). I have tried importing future.print_function and that didn't help. I also tried using the usual python updating software like futurize and 2to3, neither worked for me.


#1 Updated by Lynn Garren about 1 year ago

In most cases, editing by hand works.

See this from Chris Green.
With the possible exception of automatic handling of the change to use the Python 3-style print function, I concur. Personally, I use six where appropriate to allow my Python code to work with Python 2.6 all the way through Python 3.7, which is what contributions to Spack must support.

#2 Updated by Ryan Lazur about 1 year ago

I tried fixing it by hand but there are > 200 print statements. Also when I try to run with Python2.7 I get an error related to not being able to find the 'os' library. Also I do not get this issue when I am on the SBND gpvms running sbndcode. Am I doing something incorrectly when setting up new icaruscode?

#3 Updated by Lynn Garren about 1 year ago

From Herb:

I'm working on updating larbatch.  If you want to try updating your 
checked out version, try running the following command.

$ cd $MRB_SOURCE/larbatch
$ find . -name \*.py -exec 2to3 -w {} \;

Note that there are many issues besides just print statements.

#4 Updated by Herbert Greenlee about 1 year ago

Updates for python 3 have been merged to master branch. Now, and other python utilities in larbatch are supposed to be compatible with either python 2 or python 3.

#5 Updated by Marc Mengel about 1 year ago

Updated by Ryan Lazur 5 days ago

Thank you, Herb! That's great.

I pulled the newest branch and am no longer having issues with the code in, but I am running into another (similar) issue:

File "/cvmfs/", line 51
raise RuntimeError, 'Missing or invalid metadata for file %s.' % filename

I can run your helpful updating script on the files in icarusutil, but this should probably be fixed upstream.

#6 Updated by Lynn Garren about 1 year ago

  • Assignee set to Herbert Greenlee
  • Status changed from New to Resolved

Ryan, see Herb's talk at the LArSoft Coordination meeting this morning for more information.

I am resolving this issue.

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