MadGraph5_aMC@NLO

Installation of Madgraph5 with python 3

Asked by Cesare Cazzaniga

Hello,

I am supposed to use Madgrpah5 (+Pythia+Delphes) for my master thesis project. I have a Macbook with python 3.8. I have an issue when running ./bin/mg5_amc:

  File "./bin/mg5_amc", line 148, in <module>
    import madgraph.interface.master_interface as interface
  File "/Users/cesarecazzaniga/MG5_aMC_v2_9_2/madgraph/interface/master_interface.py", line 44, in <module>
    import madgraph.interface.madgraph_interface as MGcmd
  File "/Users/cesarecazzaniga/MG5_aMC_v2_9_2/madgraph/interface/madgraph_interface.py", line 71, in <module>
    import madgraph.iolibs.export_cpp as export_cpp
  File "/Users/cesarecazzaniga/MG5_aMC_v2_9_2/madgraph/iolibs/export_cpp.py", line 35, in <module>
    import madgraph.iolibs.helas_call_writers as helas_call_writers
  File "/Users/cesarecazzaniga/MG5_aMC_v2_9_2/madgraph/iolibs/helas_call_writers.py", line 22, in <module>
    import madgraph.loop.loop_helas_objects as loop_helas_objects
  File "/Users/cesarecazzaniga/MG5_aMC_v2_9_2/madgraph/loop/loop_helas_objects.py", line 28, in <module>
    import aloha.create_aloha as create_aloha
  File "/Users/cesarecazzaniga/MG5_aMC_v2_9_2/aloha/create_aloha.py", line 20, in <module>
    import six.moves.cPickle
ModuleNotFoundError: No module named 'six.moves.cPickle'; 'six.moves' is not a package

Do you have any idea of how I can solve this?

Thank you in advance

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Solved by:
Olivier Mattelaer
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Olivier Mattelaer (olivier-mattelaer) said : 		#1

I guess your version of the module six is not recent enough.
I would suggest to updated it.
(You can use pip for that)
see
https://github.com/home-assistant-ecosystem/home-assistant-cli/issues/166

Cheers,

Olivier

> On 16 Feb 2021, at 20:05, Cesare Cazzaniga <email address hidden> wrote:
>
> No module named 'six.moves.cPickle';

Revision history for this message
Cesare Cazzaniga (ccazzaniga) said : 		#2

Unfortunately it does not solve the problem ... I tried with that solution before .... it gives me the same problem as before ...

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Olivier Mattelaer (olivier-mattelaer) said : 		#3

What is your version of the six package?

one way to get it is to do
python3

then do
import six
six.__version__

or
[colorordering_2021_merge4]$ pip3 show six
Name: six
Version: 1.15.0
Summary: Python 2 and 3 compatibility utilities
Home-page: https://github.com/benjaminp/six
Author: Benjamin Peterson
Author-email: <email address hidden>
License: MIT
Location: /Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages
Requires:
Required-by: astroid, python-dateutil, cycler

Looking at the documentation, they do not indicate a minimal version for the support of that conversion rule.
so i do not know what is the minimal version needed

Cheers,

Olivier

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Cesare Cazzaniga (ccazzaniga) said : 		#4

yes, doing ... pip3 show six ... I get your same output...

Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said : 		#5

Then I'm not sure to understand. my best guess is that you have another file six.py which conflicts...

Can you do the equivalent of the following:
[HEPToolsInstallers]$ python3.8
Python 3.8.5 (v3.8.5:580fbb018f, Jul 20 2020, 12:11:27)
[Clang 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import six
>>> six.__version__
'1.15.0'
>>> import six.moves.cPickle
>>> six.__file__
'/Users/omattelaer/Library/Python/3.8/lib/python/site-packages/six.py'

This will indicate us if you have another file which blocks the pip file or not.

Cheers,

Olivier

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Cesare Cazzaniga (ccazzaniga) said : 		#6

yes, indeed there is a conflict with an other six from a ROOT installation:

import six
>>> six.__version__
'1.4.1'
>>> import six.moves.cPickle
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'six.moves.cPickle'; 'six.moves' is not a package
>>> six.__file__
'/Users/cesarecazzaniga/root/myBuild/lib/six.py'

So, what do you suggest to do?

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Best Olivier Mattelaer (olivier-mattelaer) said : 		#7

Hi,

I would test to do
mv /Users/cesarecazzaniga/root/myBuild/lib/six.py /Users/cesarecazzaniga/root/myBuild/lib/six.bck
rm /Users/cesarecazzaniga/root/myBuild/lib/six.py?

This should fix the problem on this side but maybe not the one for root (but I guess it should be fine).
Another option is to play with the PYTHONPATH, but you might get the same issue...
A third solution is likely virtual environment but I have never play with that.

Cheers,

Olivier

Revision history for this message
Cesare Cazzaniga (ccazzaniga) said : 		#8

Thank you,

I have solved with your suggestion .