Why is there no tuple comprehension in Python?
You can use a generator expression: but parentheses were already taken for … generator expressions.
tuples
What’s the difference between lists enclosed by square brackets and parentheses in Python?
Square brackets are lists while parentheses are tuples. A list is mutable, meaning you can change its contents: while tuples are not: The other main difference is that a tuple is hashable, meaning that you can use it as a key to a dictionary, among other things. For example: Note that, as many people have pointed out, you … Read more
How to easily initialize a list of Tuples?
c# 7.0 lets you do this: If you don’t need a List, but just an array, you can do: And if you don’t like “Item1” and “Item2”, you can do: or for an array: which lets you do: tupleList[0].Index and tupleList[0].Name Framework 4.6.2 and below You must install System.ValueTuple from the Nuget Package Manager. Framework 4.7 and above It is built … Read more
Add Variables to Tuple
Tuples are immutable; you can’t change which variables they contain after construction. However, you can concatenate or slice them to form new tuples: And, of course, build them from existing values:
Append a tuple to a list – what’s the difference between two ways?
The tuple function takes only one argument which has to be an iterable tuple([iterable]) Return a tuple whose items are the same and in the same order as iterable‘s items. Try making 3,4 an iterable by either using [3,4] (a list) or (3,4) (a tuple) For example will work
How to sort a list/tuple of lists/tuples by the element at a given index?
or: The default sort mode is ascending. To sort in descending order use the option reverse=True: or:
JavaScript variable assignments from tuples
Javascript 1.7 added destructuring assignment which allows you to do essentially what you are after.
Python: tuple indices must be integers, not str when selecting from mysql table
The python standard mysql library returns tuples from cursor.execute. To get at the question_id field you’d use row[0], not row[‘question_id’]. The fields come out in the same order that they appear in the select statement. A decent way to extract multiple fields is something like
what’s difference between array and tuple
Tuple A tuple is a grouping of unnamed, ordered values. Each value in a tuple does not need to be the same type. Array An array is mutable collection. They are very efficient to create, but must always be a single type.
Python add item to the tuple
You need to make the second element a 1-tuple, eg: