Python Strip

[dont_think_twice]

Code: Select all

>>> t = "win2.s2p"
>>> t
'win2.s2p'
>>> t.strip(".s2p")
'win'

What am I missing?

[e3k]

>>> t = "win2.s2p"
>>> t
'win2.s2p'
>>> t.strip("p2.s")
'win'

[...71...]

Code: Select all

>>> t = "win2.s2p"
>>> t
'win2.s2p'
>>> t.strip(".s2p")
'win'

What am I missing?

The order does not matter.

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In [7]: t.strip('2sp.n')
Out[7]: 'wi'

[...71...]

OFFTOP: Here's a good joke from python world:

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In [1]: a = 1234
In [2]: b = 1234

In [3]: a is b
Out[3]: False

In [4]: a = 115
In [5]: b = 115

In [6]: a is b
Out[6]: True

[RoGeorge]

LOL, I was not aware about that.

https://stackoverflow.com/questions/136 ... s-operator

Python is allowed to automatically intern any immutable types, but not required to do so. Different implementations will intern different values.

CPython (the implementation you're using if you don't know which implementation you're using) auto-interns small integers and some special singletons like False, but not strings (or large integers, or small tuples, or anything else).

[RoGeorge]

What's even stranger is the range of integers for which a is b: [-5 to +256] inclusive.

[Naib]

Code: Select all

>>> t = "win2.s2p"
>>> t
'win2.s2p'
>>> t.strip(".s2p")
'win'

What am I missing?

As others have pointed out "".strip(...) strips all occurances of the characters.
Pre 3.9 what you want todo is txt.split('.')[0] and since 3.9 you can use the removesuffix() method

[e3k]

yes i would also go with split Naib. did know there is a remove suffix in 3.9.

[dont_think_twice]

Thanks everyone. I switched to split last night without understanding why the strip didn’t work. Amazing that I never understood how that method worked.

[RoGeorge]

Never trust a Python stripper!

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$ python3
Python 3.8.10 (default, Nov 26 2021, 20:14:08) 
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.

>>> girl = "Dana"
>>> girl.strip("all clothes")
'Dan'

[Ralphred]

I switched to split last night without understanding why the strip didn’t work.

Code: Select all

''.join(t.split('.s2p'))

Seems a bit overkill, but if your not running it thousands of times a second, and won't have ".suffix" anywhere else in a string it'll work. Personally I'd be using if t.endswith() and t[:-4], it lends itself to expansion to work with multiple suffixes and non-iterative matching with little tweaking...

[notageek]

Code: Select all

>>> t = "win2.s2p"
>>> t.replace(".s2p","")
'win2'

Code: Select all

>>> t = "win2.s2p"
>>> t[:-4]
'win2'