Yeah good idea with names because php ltrim does the same as lstrip in python.
Normally I'd expect strip to behave as I proposed, not like input a string as mask of characters, which is more rare use case and confusing in some scenarios.
On мар т 24 2019, at 11:34 утра, Anders Hovmöller <boxed@killingar.net> wrote:
I don't see what trim() is good for but I know I've written ltrim() hundreds of times easy. 

I propose naming them strip_prefix() and strip_suffix() and just skip the one that does both sides since it makes no sense to me. 

Trim is generally a bad name because what is called strip() in python is called trim() in other languages. This would be needlessly confusing. 

On 24 Mar 2019, at 09:42, Alex Grigoryev <evrial@gmail.com> wrote:

Following the discussion here I propose to add 3 new string methods: str.trim, str.ltrim, str.rtrim
Another option would be to change API for str.split method to work correctly with sequences.

In [1]: def ltrim(s, seq):
   ...:     return s[len(seq):] if s.startswith(seq) else s
   ...:

In [2]: def rtrim(s, seq):
   ...:     return s[:-len(seq)] if s.endswith(seq) else s
   ...:

In [3]: def trim(s, seq):
   ...:     return ltrim(rtrim(s, seq), seq)
   ...:


In [5]: ltrim(s, 'mailto:')
Out[5]: 'maria@gmail.com'

In [6]: rtrim(s, 'com')
Out[6]: 'mailto:maria@gmail.'

In [7]: trim(s, 'm')
Out[7]: 'ailto:maria@gmail.co'

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