linux-kernel - Re: [PATCH] perf scripts python: Add Python 3 support to mem-phys-addr.py

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Date:   Thu, 17 Jan 2019 15:18:16 +0530
From:   seeteena <s1seetee@...ux.vnet.ibm.com>
To:     Jonathan Corbet <corbet@....net>
Cc:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        alexander.shishkin@...ux.intel.com, jolsa@...hat.com,
        namhyung@...nel.org, linux-kernel@...r.kernel.org,
        ravi.bangoria@...ux.ibm.com
Subject: Re: [PATCH] perf scripts python: Add Python 3 support to
 mem-phys-addr.py

I have added


On 01/16/2019 10:02 PM, Jonathan Corbet wrote:
> On Wed, 16 Jan 2019 21:53:36 +0530
> Seeteena Thoufeek <s1seetee@...ux.vnet.ibm.com> wrote:
>
>> Support both Python 2 and Python 3 in mem-phys-addr.py. ``print`` is now a
>> function rather than a statement. This should have no functional change.
>>
>> Fix lambda syntax error.
> So, I just picked one of these at random....
>
>> Signed-off-by: Seeteena Thoufeek <s1seetee@...ux.vnet.ibm.com>
>> Reviewed-by: Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
>> ---
>>   tools/perf/scripts/python/mem-phys-addr.py | 12 ++++++------
>>   1 file changed, 6 insertions(+), 6 deletions(-)
>>
>> diff --git a/tools/perf/scripts/python/mem-phys-addr.py b/tools/perf/scripts/python/mem-phys-addr.py
>> index ebee2c5..52fe9bd 100644
>> --- a/tools/perf/scripts/python/mem-phys-addr.py
>> +++ b/tools/perf/scripts/python/mem-phys-addr.py
>> @@ -38,14 +38,14 @@ def parse_iomem():
>>   			pmem.append(long(m[1], 16))
>>   
>>   def print_memory_type():
>> -	print "Event: %s" % (event_name)
>> -	print "%-40s  %10s  %10s\n" % ("Memory type", "count", "percentage"),
>> -	print "%-40s  %10s  %10s\n" % ("----------------------------------------", \
>> -					"-----------", "-----------"),
>> +	print("Event: %s" % (event_name))
>> +	print("%-40s  %10s  %10s\n" % ("Memory type", "count", "percentage")),
>> +	print("%-40s  %10s  %10s\n" % ("----------------------------------------", \
>> +					"-----------", "-----------")),
> You have not added "from __future__ import print_function", so you're
> relying on a Python 2 parsing oddity to make this work.  If anybody ever
> adds a second parameter, things will break.  I think that if you really
> want to support both versions (which seems like the right goal) you should
> add the import and do it properly.
>
> Thanks,
>
> jon
>

Thanks Jonathan. I have added "from __future__ import print_function" 
for all the scripts.