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Python extend for a dictionary - Stack Overflow Of course, you could simple note that a extend(b) is nearly the same as b update(a); a=b To remove the assignment, you could do it thus: To remove the assignment, you could do it thus: def extend(a,b): """Create a new dictionary with a's properties extended by b, without overwriting
Concatenating two lists - difference between += and extend() extend will not create a new list nor copy references elements from that list extend is equivalent to a[len(a):] = iterable extend will operate over the list you are doing the operation and should be used instead of L = L + iterable –
Append vs Extend - Stack Overflow 1) The difference between append and extend append: Appends any Python object as-is to the end of the list (i e as a the last element in the list) The resulting list may be nested and contain heterogeneous elements (i e list, string, tuple, dictionary, set, etc ) extend: Accepts any iterable as its argument and makes the list larger
Python: understanding difference between append and extend list extend uses an iterable and adds all of it's elements to the end of your list: Extend the list by appending all the items in the given list; equivalent to a[len(a):] = L You need to use: sum_vec extend([vec1[i] + vec2[i]]) # note that a list is created That way an iterable with a single item (vec1[i] + vec2[i]) is passed
python - Append vs extend efficiency - Stack Overflow 0 520906925201 #append 0 602569103241 #extend-list 0 357008934021 #extend-tuple And the same ordering of the results my linux box (Ubuntu, x86-64 core i7): 0 307395935059 #append 0 319436073303 #extend-list 0 238317012787 #extend-tuple
JavaScript equivalent of jQuerys extend method - Stack Overflow This is by far the best answer here It does deep copy, does not mangle the first object, supports infinite objects, and can alter types while extending (i e many answers here will not extend a string to an object, this answer will) This gets every check mark in my book full extend replacement, and extremely easy to understand –
Use of add(), append(), update() and extend() in Python Similar differences apply to extend vs update Using the same name for operations with such drastically different semantics would be very misleading indeed it seems pythonic to just use a list on the first pass and deal with the performance on a later iteration