2018-07-26 0:01 GMT+09:00 Jeremy Cline <jcline@xxxxxxxxxx>:
> On 07/25/2018 10:39 AM, Masahiro Yamada wrote:
>> 2018-07-21 4:35 GMT+09:00 Jeremy Cline <jcline@xxxxxxxxxx>:
>>> Use the print function. This maintains Python 2 support and should have
>>> no functional change.
>>>
>>> Signed-off-by: Jeremy Cline <jcline@xxxxxxxxxx>
>>> ---
>>> scripts/tracing/draw_functrace.py | 3 ++-
>>> 1 file changed, 2 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/scripts/tracing/draw_functrace.py b/scripts/tracing/draw_functrace.py
>>> index db40fa04cd51..7d44e796d362 100755
>>> --- a/scripts/tracing/draw_functrace.py
>>> +++ b/scripts/tracing/draw_functrace.py
>>> @@ -20,6 +20,7 @@ Usage:
>>> $ scripts/draw_functrace.py < raw_trace_func > draw_functrace
>>> Then you have your drawn trace in draw_functrace
>>> """
>>> +from __future__ import print_function
>>
>> What do you need this line for?
>>
>> I have not tested this,
>> but I guess print(CallTree.ROOT) will work for Python 2.
>
> Although "print(CallTree.ROOT)" (as a statement) works in Python 2,
> its behavior is different than print (as a function) in Python 3. In
> this case, there's no additional arguments being provided so the
> behavior will match, but if someone added an argument it would work
> differently on Python 2 vs Python 3:
>
> Python 2.7.15
>>>> print("hello", "world")
> ('hello', 'world')
>
> Python 3.6.6
>>>> print("hello, "world")
> File "<stdin>", line 1
> print("hello, "world")
> ^
> SyntaxError: invalid syntax
Yes, I know this.
> Importing the print_function works on Python 2.6+[0] and changes print
> to be a function in Python 2 so it'll behave the same in 2 and 3. Given
> that this script doesn't appear to change much it's probably not going
> to save anyone from making that mistake, though. Would you prefer a
> patch without it?
Either will do.
If it is tedious to respin, I will pick this up.
I saw only one simple print statement in this script,
so I wanted to ask you if this had some reason
I might be missing.
Anyway, we will remove 'from __future__ import print_function'
when Python 2 retires.
> [0] https://docs.python.org/3/library/__future__.html
>
> Regards,
> Jeremy
>
>>
>>
>>
>>>
>>> import sys, re
>>> @@ -123,7 +124,7 @@ def main():
>>> tree = tree.getParent(caller)
>>> tree = tree.calls(callee, calltime)
>>>
>>> - print CallTree.ROOT
>>> + print(CallTree.ROOT)
>>>
>>> if __name__ == "__main__":
>>> main()
>>> --
>>> 2.17.1
>>>
>>
>>
>>
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--
Best Regards
Masahiro Yamada
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