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All of the above answers were perfectly clear and complete, but just for the record I'd like to confirm that the meaning of * and ** in python has absolutely no similarity with the meaning of similar-looking operators in C. They are called the argument-unpacking and keyword-argument-unpacking operators.
In a function signature. *t means "take all additional positional arguments to this function and pack them into this parameter as a tuple." def foo(*t): print(t) >>> foo(1, 2) (1, 2) **d means "take all additional named arguments to this function and insert them into this parameter as dictionary entries." def foo(**d):
Aug 31, 2008 · A Python dict, semantically used for keyword argument passing, is arbitrarily ordered. However, in Python 3.6+, keyword arguments are guaranteed to remember insertion order. "The order of elements in **kwargs now corresponds to the order in which keyword arguments were passed to the function." - What’s New In Python 3.6. In fact, all dicts in ...
Apr 25, 2022 · not using ellipsis means a tuple with specific number of elements, e.g.: y: tuple[str] = ("hi", "world") # Type Warning: Expected type 'Tuple[str]', got 'Tuple[str, str]' instead. This goes in contrast to notation of other collections, e.g. list[str] means list of any length with elements of type str. answered Apr 25, 2022 at 14:26.
Sep 9, 2014 · A tuple is a sequence of values. The values can be any type, and they are indexed by integer, so tuples are not like lists. The most important difference is that tuples are immutable. A tuple is a comma-separated list of values: t = 'p', 'q', 'r', 's', 't'. it is good practice to enclose tuples in parentheses:
Mar 9, 2009 · Apart from tuples being immutable there is also a semantic distinction that should guide their usage. Tuples are heterogeneous data structures (i.e., their entries have different meanings), while lists are homogeneous sequences. Tuples have structure, lists have order.
Single elements of a tuple a can be accessed -in an indexed array-like fashion-via a[0], a[1], ... depending on the number of elements in the tuple. Example. If your tuple is a=(3,"a") a[0] yields 3, a[1] yields "a" Concrete answer to question def tup(): return (3, "hello") tup() returns a 2-tuple. In order to "solve"
Feb 4, 2021 · TL;DR: Don't try to mutate tuple. if you do and it is a one-time operation convert tuple to list, mutate it, turn list into a new tuple, and reassign back to the variable holding old tuple. If desires tuple and somehow want to avoid listand want to mutate more than once then create mutabletuple.
Mar 3, 2014 · 50. You return four variables s1,s2,s3,s4 and receive them using a single variable obj. This is what is called a tuple, obj is associated with 4 values, the values of s1,s2,s3,s4. So, use index as you use in a list to get the value you want, in order. obj=list_benefits() print obj[0] + " is a benefit of functions!"
Jan 26, 2013 · In Python, any immutable object (such as an integer, boolean, string, tuple) is hashable, meaning its value does not change during its lifetime. This allows Python to create a unique hash value to identify it, which can be used by dictionaries to track unique keys and sets to track unique values.
