WebIt is very common for me to loop through a python list to get both the contents and their indexes. What I usually do is the following: S = [1,30,20,30,2] # My list for s, i in zip(S, … Iterate over two lists at once using Python's zip () function. items = [8, 23, 45, 12, 78] indices = [] for index in range (len (items)): indices.append (index) for item, index in zip (items, indices): print (" {}: {}".format (index, item)) 11. Loop over 2 lists with a while loop and iter () & next () methods. See more What you are asking for is the Pythonic equivalent of the following, which is the algorithm most programmers of lower-level languages would use: Or in languages that do not have a for-each loop: or sometimes more commonly (but … See more Python's enumerate function reduces the visual clutter by hiding the accounting for the indexes, and encapsulating the iterable into another … See more
Python Program to Access Index of a List Using for Loop
WebFeb 14, 2013 · Consider the following Python code with which I add in a new list2 all the items with indices from 1 to 3 of list1: for ind, obj in enumerate (list1): if 4 > ind > 0: list2.append (obj) How would you write this using list comprehension, if I have no access to the indices through enumerate? something like: list2 = [x for x in list1 if 4 > ind > 0] Webeven_items () takes one argument, called iterable, that should be some type of object that Python can loop over. First, values is initialized to be an empty list. Then you create a for loop over iterable with enumerate () and set start=1. Within the for loop, you check whether the remainder of dividing index by 2 is zero. google tests iar
python - How to get the index of the current iterator item …
WebNov 9, 2014 · manipulating/removing elements while you iterate over a list will change the index of elements, numbers_buf = numbers creates a reference to the numbers list, basically a pointer to the same object so remove from one, remove from both. Using numbers [:] creates a copy/new object. WebIn that case, you can go that way : iterable = [1,2,3] # Your date iterator = iter (iterable) # get the data iterator try : # wrap all in a try / except while 1 : item = iterator.next () print item # put the "for loop" code here except StopIteration, e : # make the process on the last element here print item. WebMar 20, 2024 · Iterate over numpy with index (numpy equivalent of python enumerate) (3 answers) Closed 4 years ago. For python dict, I could use iteritems () to loop through key and value at the same time. But I cannot find such functionality for NumPy array. I have to manually track idx like this: idx = 0 for j in theta: some_function (idx,j,theta) idx += 1 chicken in warm brine in refrigerator