Exclude a value from a list python

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WebMar 24, 2024 · I am writing a linear program in python gurobi and I am trying to create some constraints only including a multiplication of the elements of two lists but excluding the zeros. More specifically: A is a list that contains only positive or zero elements, B is a list with binary variables demonstrating the positions where there are zeros in A list, for … WebMar 14, 2024 · Using remove () to remove all values from a list present in other list remove () can also perform this task but only if the exception of not getting specific elements is handled properly. One can iterate for all the elements of the removed list and remove those elements from the original list. Python3 test_list = [1, 3, 4, 6, 7]

Generate random number in range excluding some numbers

WebOct 18, 2024 · With Python you have multiple options to remove None values from a list. Those options include a basic for loop or by using list comprehension. A more readable … WebMay 8, 2010 · Usually Python will throw an Exception if you tell it to do something it can't so you'll have to do either: if c in a: a.remove (c) or: try: a.remove (c) except ValueError: pass An Exception isn't necessarily a bad thing as long as it's one you're expecting and handle properly. Share Improve this answer Follow answered May 8, 2010 at 8:02 ship lapland

Exclude items from list of lists Python - Stack Overflow

WebFrom what I vaguely remember, with very large unicode objects in Python 2.7, I found a case with a cutoff between 6 and 7… but someone else found a case that was almost twice as high, possibly in a different Python implementation. Of course notice the "with strings"; hashing ints is a lot faster, even huge ints, so I'd expect it to be around 2-3 at worst… WebI have a NumPy array, and I want to retrieve all the elements except a certain index. For example, consider the following array a = [0,1,2,3,4,5,5,6,7,8,9] If I specify index 3, then the resultant WebAug 27, 2015 · I am looking for a basic way to exclude printing an item from a list (not remove/delete) if that named value = something specified, e.g. = 0 I thought it would be something basic like this, but I get an error that I is not defined. a = 2 b = 0 c = 4 d = 0 e = 6 lis = [a,b,c,d,e] while i != 0 in range (lis): print (lis [i]) Wanted result: 2 4 6 ship lapped

python - excluding rows from a pandas dataframe based on column value ...

python - How to exclude zeros from a list - Stack Overflow

WebNov 15, 2024 · For excluding just one element, the 2 slice lst[:i] + lst[i + 1:] approach proposed by @Applet123 is probably the fastest (Or perhaps a excluded = lst.pop(1) to extract the excluded element and for x in lst: print(x) for printing all the others; then … WebNov 22, 2024 · Django - Exclude a value from a .value_list. Greeting everyone, I trying to filter a specific value list from my model below is my code : employee_name = WorkOrder.objects.filter ( project_id=48 ).values_list ( 'assign_to__official_name', flat=True ).distinct () print (employee_name) How can I exclude the value 'NONE' from this … ship lap wood sidingWebNov 10, 2024 · This is a list comprehension, its a way for building a new list via transversing an iterable. Its the same as writing excluded_station_x = [] for i, col in enumerate (x): if i not in stations: excluded_station_x.append (col) enumerate () yields both the value and index of each element as we iterate through the list. ship laptop fedex

"WebMar 24, 2024 · import random def random_exclusion (start, stop, excluded) -> int: """Function for getting a random number with some numbers excluded""" excluded = set (excluded) value = random.randint (start, stop - len (excluded)) # Or you could use randrange for exclusion in tuple (excluded): if value < exclusion: break value += 1 return … " - Exclude a value from a list python

Exclude a value from a list python

python - Is there a simple way to delete a list element by value ...

WebJun 19, 2024 · 5. I'd like to create a random list of numbers in python, but exclude a certain number, k. I can create a random list of integers: l = [random.randint (0,10) for i in range (5)] Then I can remove the number, k, if it's there, and add another random number in the range, but this seems like too many steps. In researching this, It's quite easy to ... WebNov 5, 2024 · The many ways to remove an item from a Python list The Quick Answer: Use pop, remove, and del Python Remove Method to Remove List Item Based on its Value Python makes it easy to delete a list item based on its value by using the Python list remove method.

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WebSep 17, 2016 · # Assume a, b are Python lists # Create sets of a,b setA = set (a) setB = set (b) # Get new set with elements that are only in a but not in b onlyInA = setA.difference (b) UPDATE As iurisilvio and mgilson pointed out, this approach only works if a and b do not contain duplicates, and if the order of the elements does not matter. Share

WebJun 4, 2014 · You can make a more general-purpose generator to do what you want like this: def exclusion_generator (base_list, to_excludes): for item in base_list: if item not in to_excludes: yield item and use it like this: for obj1 in objs: for obj2 in exclusion_generator (objs, (obj1,)): for obj3 in exclusion_generator (objs, (obj1, obj2)): # .... Share WebSep 9, 2024 · However you can exclude specific numbers by doing: all_numbers = range (0, 11) exclude_set = {0} # a set containing the value 0 numbers = (num for num in all_numbers if num not in exclude_set) This could be useful if you have a set of numbers that you know are wrong, but otherwise have a contiguous range.

WebMar 2, 2015 · When I print the content variable to the console its value is: [-33.939999, 151.03918, masked, masked, masked, masked, masked, masked, masked] I've tried the below code block to check if the row doesn't contain masked or "--" and write those values. Its not working! How do I exclude or check for those values? WebMar 13, 2014 · And there are some names in one of the columns that I do not want to include, how do I remove those rows from the dataframe, without using index value notation, but by saying if row value = "this" then remove like... new = df.copy df ['some column'].drop_values ('this','that','other') python pandas Share Improve this question …

WebPandas how to find column contains a certain value Recommended way to install multiple Python versions on Ubuntu 20.04 Build super fast web scraper with Python x100 than BeautifulSoup How to convert a SQL query result to a Pandas DataFrame in Python How to write a Pandas DataFrame to a .csv file in Python

WebOct 10, 2016 · The first dataset is an answer dataset (gender is an answer). So, I want to exclude from the second dataset those customer_id which are in the first dataset (which gender we know) and call it 'train'. The rest records should become a 'test' dataset. Sorry are you after train = df2 [df2 ['customer_id'].isin (~df1 ['customer_id'])]? ship laptop cpuWebNov 6, 2015 · If you want the result to be a list again: # result will be a list with a new order not_in_m1 = list(set(testlist) - set(m1)) Be aware that using sets will lose the order of … ship lapping a wallWebDec 23, 2024 · Using filter () + lambda to remove all values from a list present in other list. The filter function can be used along with lambda to perform this task and creating a new … ship laptop to indiaWebAdd a comment. 2. First of all, you can create your excludedList. Nmax = 5 excludedList = [12 + 7 * i for i in range (1, Nmax)] Now you can check if the value of your iterator is in excludedList or not. for i in range (13,50): if i in excludedList : continue print (i) Share. Improve this answer. Follow. ship laptop internationallyWebOld answer. In your countries list, the literal 'nan' is a string not the Python float nan which is equivalent to: float ('NaN') In your case the following should suffice: cleanedList = [x for x in countries if x != 'nan'] Share. Improve this answer. edited Apr 13, 2024 at 8:02. answered Jan 9, 2014 at 4:51. ship laptop to india from usaWebNov 5, 2024 · The method scans a list for the first instance of that value and removes the first instance of that value. Let’s see how we can use the .remove () list method to … ship laptops to ethiopiaWebNov 3, 2024 · In Python, there are several methods available that allow you to remove elements from a list. The remove () method will remove the first instance of a value in a list. list = [1, 2, 3, 1] list.remove (1) # [2, 3, 1] The pop () method removes an element at a given index, and will also return the removed item. ship large package