![]() However, unpacking is most commonly used with tuples because there are better ways to get elements out of strings and lists. This almost works: t, p zip (out) but it t is. Tip You can actually unpack any sequence object in this way. A related question is how I can unpack either this structure or the resulting dataframe into two Series/array objects. In other words, during unpacking, we extract values from the tuple and. Use itertools.iziplongest: from itertools import iziplongest maxparams 3 args (1, 2) foo, bar, baz zip (iziplongest (args, range (maxparams))) 0 I should note that if you find yourself having to do this, though, you should probably consider storing the parameters in a dict instead of unpacking them into variables. Python has tuple assignment feature which enables you to assign more than one variable at a time. Traceback (most recent call last): File "", line 1, in VaiueError: too many values to unpack While unpacking a tuple, Python maps right-hand side arguments into the left-hand side. If you don't have the same number of names as tuple items, you get a vaiueError, as shown here: > x = [('rock crushes', 'scissors'), ('paper covers', 'rock'), ![]() The following example unpacks a tuple consisting of three lists: Because the outer container has only one element, your unpacking assignment fails. You need one name for each item in the tuple. Your value is not a tuple, it is a list with one element, which is a tuple the nested tuple has 3 elements. Put the names you want to unpack into on the left side of the assignment statement and put the tuple on the right side. Lets suppose you want to get the first and last. To unpack a tuple, just assign multiple names on a single line. The asterisk operator () is used to unpack all the values of an iterable that have not been assigned yet. ![]() For instance, name, age, sal emp unpack emp tuple and assign name as John. With tuple unpacking, you can easily get at the individual items in these tuples. By using the, we can assign multiple unpacked tuple items to a single variable. Tuple unpacking is useful because many functions in Python, such as the zip() function described in the previous "Building lists incrementally" section, return tuples. Unpacking a tuple means giving a different name to each element of the tuple. ![]()
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