On 2019-09-01 8:12 AM, Hongyi Zhao wrote:
Hi,
The following two forms are always equivalent:
``if var'' and ``if var is not None''
Regards
Not so. Here is an example -
>>> var = []
>>> bool(var)
False
>>> bool(var is not None)
True
>>>
Frank Millman
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On Sun, Sep 1, 2019 at 4:16 PM Hongyi Zhao wrote:
>
> Hi,
>
> The following two forms are always equivalent:
>
> ``if var'' and ``if var is not None''
>
Ahh... False. I'll go False. I'll be honest, I might have heard
that one before, though. Sort of cheating.
ChrisA
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Hi,
The following two forms are always equivalent:
``if var'' and ``if var is not None''
Regards
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Hi:
I want to append some log of pycurl's downloading info to file, and I
only want to reserve the last appended line when write. How to do this?
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On 31Aug2019 19:11, CrazyVideoGamez wrote:
How do you change the color of the bar in pygal?
I want to change it from red to blue. Help!
http://www.pygal.org/en/stable/documentation/custom_styles.html
You _did_ look at the documentation didn't you? This took me about a
minute to find, and I'v
How do you change the color of the bar in pygal?
I want to change it from red to blue. Help!
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On Sunday, 1 September 2019 05:19:34 UTC+10, Piet van Oostrum wrote:
> Sayth Renshaw writes:
>
> > But on both occasions I receive this error.
> >
> > # KeyError: 'the label [Current Team] is not in the [index]'
> >
> > if I test df1 before trying to create the new column it works just fine.
> >
Sayth Renshaw writes:
> But on both occasions I receive this error.
>
> # KeyError: 'the label [Current Team] is not in the [index]'
>
> if I test df1 before trying to create the new column it works just fine.
>
What do you mean by testing df1?
And could it be that 'Current Team' is spelled diff
On Sat, 31 Aug 2019 16:37:23 +0200
Peter Otten <__pete...@web.de> wrote:
> Manfred Lotz wrote:
>
> > Hi there,
> > This is a beginner question.
> >
> > I learned that
> >
> > with open("foo.txt") as f:
> > lines = f.readlines()
> >
> > using the with-construct is the recommended way to
On Sat, 31 Aug 2019 15:43:41 +0200
Piet van Oostrum wrote:
> Max Zettlmeißl writes:
>
> > On Sat, Aug 31, 2019 at 2:22 PM Manfred Lotz
> > wrote:
> >>
> >> Could I use the latter as a substitute for the with-construct?
> >>
> >
> > You can't use the second statement as a proper substitute
Manfred Lotz wrote:
> Hi there,
> This is a beginner question.
>
> I learned that
>
> with open("foo.txt") as f:
> lines = f.readlines()
>
> using the with-construct is the recommended way to deal with files
> making sure that close() always happens.
>
> However, I also could do:
>
>
On 2019-08-31, Manfred Lotz wrote:
> Hi there,
> This is a beginner question.
>
> I learned that
>
> with open("foo.txt") as f:
> lines = f.readlines()
>
> using the with-construct is the recommended way to deal with files
> making sure that close() always happens.
More importantly, it m
Max Zettlmeißl writes:
> On Sat, Aug 31, 2019 at 2:22 PM Manfred Lotz wrote:
>>
>> Could I use the latter as a substitute for the with-construct?
>>
>
> You can't use the second statement as a proper substitute for the first one.
>
> With the context manager, it is ensured that the file is close
On Sat, Aug 31, 2019 at 2:22 PM Manfred Lotz wrote:
>
> Could I use the latter as a substitute for the with-construct?
>
You can't use the second statement as a proper substitute for the first one.
With the context manager, it is ensured that the file is closed. It's
more or less equal to a "fin
Hi there,
This is a beginner question.
I learned that
with open("foo.txt") as f:
lines = f.readlines()
using the with-construct is the recommended way to deal with files
making sure that close() always happens.
However, I also could do:
lines = open("foo.txt").readlines()
I have to a
Cristian Cocos wrote:
And that is because entities belonging to the same
taxonomical class ("clade") have common features, and also inherit the
features of the taxonomical parent.
I think the notion you're after is what is known in the Python
world as a "protocol". This is an informal collectio
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