What are the little-known features of python
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Subtle string > a = "wtf"
> b = "wtf"
> an is b
True
> a = "wtf!"
> b = "wtf!"
> an is b
False
> A, b = "wtf!", "wtf!"
> an is b
The result returned by True # 3.7is False. Unexpected "is" > a = 256
> b = 256
> an is b
True
> a = 257
> b = 257
> an is b
False
A = 257; b = 257
> an is b
True said that the tuple is immutable. Some_tuple = ("A", "tuple", "with", "values")
Another_tuple = ([1,2], [3,4], [5,6])
> some_tuple [2] = "change this"
TypeError: 'tuple' object does not support item assignment
> another_tuple [2] .append (1000) # No error occurs here
> another_tuple
([1,2], [3,4], [5, 6, 1000])
> another_tuple [2] + = [99999]
TypeError: 'tuple' object does not support item assignment
> another_tuple
([1, 2], [3, 4], [5, 6, 1000, 9999]) vanishing global variable e = 7
Try:
Raise Exception ()
Except Exception as e:
Pass
Output
> > print (e)
NameError: which value def some_func () is returned when name 'e'is not definedtry encounters finally:
Try:
Return 'from_try'
Finally:
Return 'from_finally'
Output
> > some_func ()
From_finally' at this point, I believe you have a deeper understanding of "what are the little-known features of python?" you might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!
