str.format --- without def/lambda clear solution for Say Hi by flpo - python coding challenges

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str.format --- without def/lambda solution in Clear category for Say Hi by flpo

say_hi = "Hi. My name is {} and I'm {} years old".format

Nov. 4, 2017

Comments:

levelup_oduvan on Nov. 6, 2017, 2:55 p.m.
this is awesome!!

flpo on Nov. 6, 2017, 10:25 p.m.
Thanks!!

9Teen90Three on Nov. 15, 2017, 4:41 p.m.
Looks cool. Can you explain one moment please? When you added format at the end of the string, what you created? Is it just variable, or function or what?

flpo on Nov. 21, 2017, 5:17 p.m.
Hi, thanks for the compliment! <blockquote> When you added format at the end of the string, what you created? </blockquote> I didn't create anything: I simply got the attribute named `format` from the `str` object `"Hi. My name is {} and I’m {} years old"`. This attribute is a method defined in the builtin class `str`: <pre class='brush: python'>>>> "Hi. My name is {} and I’m {} years old".format <built-in method format of str object at 0x...> </pre> Here you can read the doc related with string formatting: <pre class='brush: python'>help(str.format) help('FORMATTING') </pre> Now, if this is clear: <pre class='brush: python'>>>> "Hi. My name is {} and I’m {} years old".format("Alex", 32) "Hi. My name is Alex and I'm 32 years old" </pre> Then also this one should be: <pre class='brush: python'>>>> say_hi = "Hi. My name is {} and I’m {} years old".format >>> say_hi("Alex", 32) "Hi. My name is Alex and I'm 32 years old" </pre> If this is not enough clear, feel free to ask :-)

veky on April 17, 2018, 10:08 a.m.
Hm... actually, you did create something: a bound method. :-) You can verify it with: <pre class='brush: python'>>>> f, g = ''.format, ''.format >>> f is g False </pre> But yes, you didn't create a function in the full sense.

flpo on April 26, 2018, 9:01 a.m.
Wow, cool! Thanks for the clarification :) I had never noticed that bound methods were materialized as new instances for each `getattr` resolution.

veky on April 26, 2018, 2:15 p.m.
Well, what are the alternatives? Caching them in some weakref dictionary seems like a clear violation of PEP[20].splitlines()[18]. :-P

guest_9519823 on Nov. 15, 2017, 5:52 p.m.
say_hi = "Hi. My name is {} and I'm {} years old".format It's incomplete and does not work.

oduvan on Nov. 20, 2017, 7:33 a.m.
it is complete and it works... Just use your imagination :)

srisaiela on Nov. 23, 2017, 4:56 a.m.
It works 100%, but question was to create a function. can you explain in function?

aquazul on Nov. 26, 2017, 2:48 a.m.
The answer must be a callable, but does not have to be a function. i. e., it can be a method or a class constructor or something.

flpo on Nov. 26, 2017, 9:06 a.m.
<blockquote> The answer must be a callable </blockquote> That's right! As an example, with <a href="https://py.checkio.org/mission/say-history/publications/flpo/python-3/callable-object/">this solution</a> `say_hi` is a callable object :-)

Lightras on June 2, 2018, 4:12 p.m.
mindblowing!

tomczyk006 on Oct. 25, 2018, 9:05 a.m.
nice

hiroshiharada48 on Aug. 8, 2019, 11:30 a.m.
Awesome!

reza.takhshid on Oct. 18, 2019, 10:19 p.m.
Cool, I learned something today!

Polygon

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