[Python-ideas] contains_any_in and contains_all_in

[Terry Reedy]

On 4/23/2019 4:39 PM, João Matos wrote:
> Hello,
> 
> If we want to check if a string contains any/all of several other 
> strings we have to use several or/and conditions or any/all.
> 
> For any:
> |if ('string1' in master_string or 'string2' in master_string
>          or 'string3' in master_string):
> or
> ifany(item inmaster_string foritem in['string1','string2','string3']):

Trivial with re module, which will answer the question in one pass.


> For all:
> |
> ||if ('string1' in master_string and 'string2' in master_string
>          and'string3' in master_string):
> or
> ||ifall(item inmaster_string foritem in['string1','string2','string3']):

Tougher.
Are the strings guaranteed to not be prefixes of each other?
Do you want to allow overlaps?
Can do in one pass by compiling a new re every time an item is found.
If overlaps not wanted, re.iterfind will find all occurrence of any, so 
feed to set and see if all found.

-- 
Terry Jan Reedy