Tuples Partial Match

I have a tuple of tuples and a tuple. I'm interested to know which elements of the first tuple match the second tuple (if any), considering partial matches too. This is a filter fu

Solution 1:

Why don't you use the built-in filter:

>>> filter(lambda x: x[2] == '1.3', repo)
<<< (('framework', 'django', '1.3'), ('cms', 'fein', '1.3'))

...or a list comprehension:

>>> [x for x in repo if x[2] == '1.3']
<<< [('framework', 'django', '1.3'), ('cms', 'fein', '1.3')]

If you wanted to wrap it up into a function:

types = {'desc': 0, 'name': 1, 'version': 2}
defrepo_filter(type, critera, repo=repo, types=types):
    return [x for x in repo if x[types[type]] == critera]

>>> repo_filter('version', '1.3')
<<< [('framework', 'django', '1.3'), ('cms', 'fein', '1.3')]

Solution 2:

You can use a closure to bind the pattern into the function:

defmatcher(pattern):
    deff(repo):
        returnall(p isNoneor r == p for r, p inzip(repo, pattern))
    return f

>>> repo = (('framework', 'django', '1.3'), ('cms', 'fein', '1.3'), ('cms', 'django-cms', '2.2'))
>>> pattern = (None, None, '1.3')
>>> filter(matcher(pattern), repo)
(('framework', 'django', '1.3'), ('cms', 'fein', '1.3'))

I've also provided a different expression for comparing the tuples.

Solution 3:

In[43]: [r for r in repo if all((p is None or q==p) for q,p in zip(r,pattern))]Out[43]: [('framework', 'django', '1.3'), ('cms', 'fein', '1.3')]

Solution 4:

defmy_filter(pattern, repo):
    deff
        pattern = (None, None, '1.3')
        for idx, item inenumerate(pattern):
            if item != Noneand item != repo[idx]:
                returnFalsereturnTruereturnfilter(f, repo)


 my_filter((None, None, '1.3'), repo)

Solution 5:

What about:

deff(repo, pattern=None):
    ifnot pattern:
        pattern = (None, None, '1.3')
    for idx, item inenumerate(pattern):
        if item and item != repo[idx]:
            returnFalsereturnTrue

repo = (('framework', 'django', '1.3'), ('cms', 'fein', '1.3'), ('cms', 'django-cms', '2.2'))

[x for x in repo if f(x)]
>>>[('framework', 'django', '1.3'), ('cms', 'fein', '1.3')]    

[x for x in repo if f(x, ('cms',None, None))]
>>> [('cms', 'fein', '1.3'), ('cms', 'django-cms', '2.2')]