Fix :valueerror: max() arg is an empty sequenc in Python

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I have multiple lists looks like that:

CV_PKG_RHEL_LST = []
        for pkg_name in cv_packages_dic['results']:
                rh_rl_server = pkg_name['nvrea']
                CV_PKG_RHEL_LST.append(rh_rl_server)
        print(CV_PKG_RHEL_LST)

[rver-6Server-6.5.0.1.el6.x86_64', u'redhat-release-server-6Server-6.6.0.2.el6.x86_64', u'redhat-release-server-6Server-6.7.0.3.el6.x86_64', u'redhat-release-server-6Server-6.8.0.5.el6.x86_64']
[u'redhat-release-server-6Server-6.0.0.37.el6.x86_64', u'redhat-release-server-6Server-6.1.0.2.el6.x86_64', u'redhat-release-server-6Server-6.2.0.3.el6.x86_64', u'redhat-release-server-6Server-6.3.0.3.el6.x86_64', u'redhat-release-server-6Server-6.4.0.4.el6.x86_64', u'redhat-release-server-6Server-6.5.0.1.el6.x86_64', u'redhat-release-server-6Server-6.6.0.2.el6.x86_64', u'redhat-release-server-6Server-6.7.0.3.el6.x86_64', u'redhat-release-server-6Server-6.8.0.5.el6.x86_64']

then I am checking max value of the list CV_PKG_RHEL_LST on
each integration:

MAX_CV_PKG_RHEL_LST = max(CV_PKG_RHEL_LST)

once the script is getting to the max I am getting:
ValueError: max() arg is an empty sequenc

but if I am running max on the list from the python interpreter its working file ,please advise

What I have tried:

tried to check if the list is empty before applying the max function

if CV_PKG_RHEL_LST:
      MAX_CV_PKG_RHEL_LST = max(CV_PKG_RHEL_LST)

but still getting the same result

Posted 15-Oct-17 1:34am

Member 13465994

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Comments

Kornfeld Eliyahu Peter 15-Oct-17 7:51am

1. Why the indentation of the loop?
2. does it ever reach into the loop or the arrays stays empty?

Richard MacCutchan 15-Oct-17 8:16am

Where exactly do you have the line that throws the error? Is it separate from the first code block?

Looking further, there is definitely something wrong with that list.

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