Installing Pythia8

Asked by Shelley Tong

Hey there! I tried to install Pythia8 from Madgraph, but when I ran the command >install pythia8, the following message showed up:

   You are installing 'pythia8', please cite ref(s): arXiv:1410.3012.
Downloading the HEPToolInstaller at:
   http://madgraph.physics.illinois.edu/Downloads/HEPToolsInstaller/HEPToolsInstaller_V167.tar.gz
LHAPDF was not found. Do you want to install LHPADF6? (recommended) y/n >[y] [60s to answer]
>n
You decided not to link the Pythia8 installation to LHAPDF. Beware that only built-in PDF sets can be used then.
Now installing Pythia8. Be patient...
/Users/mac/MadLabFolder/MG5_aMC_v3_3_2/HEPTools/HEPToolsInstallers/HEPToolInstaller.py:510: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
  _mg5_version = LooseVersion(line[9:].strip())
/Users/mac/MadLabFolder/MG5_aMC_v3_3_2/HEPTools/HEPToolsInstallers/HEPToolInstaller.py:456: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
  if tool_name in ['lhapdf6', 'lhapdf'] and MG5_version and MG5_version < LooseVersion("2.6.1"):
/Users/mac/MadLabFolder/MG5_aMC_v3_3_2/HEPTools/HEPToolsInstallers/HEPToolInstaller.py:255: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
  ( lambda MG5version: MG5version < LooseVersion("2.6.1"),
Optional 'pythia8' dependency 'lhapdf6' is disabled and will not be available.
Fetching data with command:
  curl -OL https://pythia.org/download/pythia83/pythia8306.tgz
  % Total % Received % Xferd Average Speed Time Time Time Current
                                 Dload Upload Total Spent Left Speed
  0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
curl: (60) SSL certificate problem: certificate has expired
More details here: https://curl.haxx.se/docs/sslcerts.html

curl performs SSL certificate verification by default, using a "bundle"
 of Certificate Authority (CA) public keys (CA certs). If the default
 bundle file isn't adequate, you can specify an alternate file
 using the --cacert option.
If this HTTPS server uses a certificate signed by a CA represented in
 the bundle, the certificate verification probably failed due to a
 problem with the certificate (it might be expired, or the name might
 not match the domain name in the URL).
If you'd like to turn off curl's verification of the certificate, use
 the -k (or --insecure) option.
HTTPS-proxy has similar options --proxy-cacert and --proxy-insecure.
Could not download data at 'https://pythia.org/download/pythia83/pythia8306.tgz' because of:
stat: path should be string, bytes, os.PathLike or integer, not NoneType

Command "install pythia8" interrupted with error:
InvalidCmd : Installation of pythia8 failed.

What does " path should be string, bytes, os.PathLike or integer, not NoneType" mean?

Thanks!

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Olivier Mattelaer (olivier-mattelaer) said :
#1

Hi,

Your issue is a certificate issue.

> curl performs SSL certificate verification by default, using a "bundle"
> of Certificate Authority (CA) public keys (CA certs). If the default
> bundle file isn't adequate, you can specify an alternate file
> using the --cacert option.
> If this HTTPS server uses a certificate signed by a CA represented in
> the bundle, the certificate verification probably failed due to a
> problem with the certificate (it might be expired, or the name might
> not match the domain name in the URL).

I guess that the issue is that your curl version is not up-to-date and does not recognize the certificate used
by the pythia8 server. But I may be wrong.

Cheers,

Olivier

> On 21 Apr 2022, at 04:55, Shelley Tong <email address hidden> wrote:
>
> New question #701447 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/701447
>
> Hey there! I tried to install Pythia8 from Madgraph, but when I ran the command >install pythia8, the following message showed up:
>
> You are installing 'pythia8', please cite ref(s): arXiv:1410.3012.
> Downloading the HEPToolInstaller at:
> http://madgraph.physics.illinois.edu/Downloads/HEPToolsInstaller/HEPToolsInstaller_V167.tar.gz
> LHAPDF was not found. Do you want to install LHPADF6? (recommended) y/n >[y] [60s to answer]
>> n
> You decided not to link the Pythia8 installation to LHAPDF. Beware that only built-in PDF sets can be used then.
> Now installing Pythia8. Be patient...
> /Users/mac/MadLabFolder/MG5_aMC_v3_3_2/HEPTools/HEPToolsInstallers/HEPToolInstaller.py:510: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
> _mg5_version = LooseVersion(line[9:].strip())
> /Users/mac/MadLabFolder/MG5_aMC_v3_3_2/HEPTools/HEPToolsInstallers/HEPToolInstaller.py:456: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
> if tool_name in ['lhapdf6', 'lhapdf'] and MG5_version and MG5_version < LooseVersion("2.6.1"):
> /Users/mac/MadLabFolder/MG5_aMC_v3_3_2/HEPTools/HEPToolsInstallers/HEPToolInstaller.py:255: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
> ( lambda MG5version: MG5version < LooseVersion("2.6.1"),
> Optional 'pythia8' dependency 'lhapdf6' is disabled and will not be available.
> Fetching data with command:
> curl -OL https://pythia.org/download/pythia83/pythia8306.tgz
> % Total % Received % Xferd Average Speed Time Time Time Current
> Dload Upload Total Spent Left Speed
> 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
> curl: (60) SSL certificate problem: certificate has expired
> More details here: https://curl.haxx.se/docs/sslcerts.html
>
> curl performs SSL certificate verification by default, using a "bundle"
> of Certificate Authority (CA) public keys (CA certs). If the default
> bundle file isn't adequate, you can specify an alternate file
> using the --cacert option.
> If this HTTPS server uses a certificate signed by a CA represented in
> the bundle, the certificate verification probably failed due to a
> problem with the certificate (it might be expired, or the name might
> not match the domain name in the URL).
> If you'd like to turn off curl's verification of the certificate, use
> the -k (or --insecure) option.
> HTTPS-proxy has similar options --proxy-cacert and --proxy-insecure.
> Could not download data at 'https://pythia.org/download/pythia83/pythia8306.tgz' because of:
> stat: path should be string, bytes, os.PathLike or integer, not NoneType
>
> Command "install pythia8" interrupted with error:
> InvalidCmd : Installation of pythia8 failed.
>
> What does " path should be string, bytes, os.PathLike or integer, not NoneType" mean?
>
> Thanks!
>
> --
> You received this question notification because you are an answer
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