If you truly hate the trailing comma syntax, a workaround is to pass a list to the tuple() function: x = tuple(['a']) Open Konsole terminal always in split view. Thanks. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. I suggest you use the succession of try and except that I evoked above: You don't want to mutate the list in place (eg by using .pop()). The downside is that there is some performance penalty for using exception handling. It's slower in the failure cases too (particularly when the iterable is too long), but those hardly matter (and the relative loss is much smaller, taking only 25-100% longer, not ~9x). Connect and share knowledge within a single location that is structured and easy to search. In this example, Lets see how to get evenly sized lists from the user. For instance, why does Croatia feel so safe? Raw green onions are spicy, but heated green onions are sweet. What does skinner mean in the context of Blade Runner 2049, Deleting file marked as read-only by owner, Do starting intelligence flaws reduce the starting skill count. How do I distinguish between chords going 'up' and chords going 'down' when writing a harmony? Not the answer you're looking for? Is there anything better? There seems to be an alternative way to do everything in Python. Non-anarchists often say the existence of prisons deters violent crime. Thanks :). How do I merge two dictionaries in a single expression in Python? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Pythonic way to get the single element of a 1-sized list. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Asking for help, clarification, or responding to other answers. Is there a non-combative term for the word "enemy"? What syntax could be used to implement both an exponentiation operator and XOR? Why a kite flying at 1000 feet in "figure-of-eight loops" serves to "multiply the pulling effect of the airflow" on the ship to which it is attached? Connect and share knowledge within a single location that is structured and easy to search. I am now using this method and include a link to the docs for unpacking in the docstring. Curiosity alone. Why is this? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Making statements based on opinion; back them up with references or personal experience. That seems pointless. First story to suggest some successor to steam power? How to calculate the reverberation time RT60 given dimensions of a room? Find centralized, trusted content and collaborate around the technologies you use most. Asking for help, clarification, or responding to other answers. My bad. To learn more, see our tips on writing great answers. Problem could be if you needed to pass more arguments to the same function, not just the list/single argument. @NullUserException: Downvotes mean "this is wrong" or "this isn't helpful in the given context". The formula to calculate average in Python is done by calculating the sum of the numbers in the list divided by the count of numbers in the list. Sharing helps me continue to create free Python resources. Use an input() function to accept the list elements from a user in the format of a string separated by space. Therefore, the semantics are different. Write a Python program to get a list, sorted in increasing order by the last element in each tuple from a given list of non-empty tuples. @KilianFoth: I don't think this applies here. Write a Python program to remove duplicates from a list. I usually go for item = singlet_list [0] This would fail for an empty list, but I would like a way to make it fail even if the list is longer, something like: assert (len (singlet_list) == 1) item = singlet_list [0] but I find this ugly. "Composite design pattern" would require to wrap the passed parameter in an additional class hierarchy, but additional wrappers is exactly what the OP tries to avoid. Why is it string.join(list) instead of list.join(string)? You can do what you're asking, but please don't. How to iterate for specific elements in a list? dmitri shostakovich vs Dimitri Schostakowitch vs Shostakovitch, Do starting intelligence flaws reduce the starting skill count, Open Konsole terminal always in split view. The purpose of that line is to implement an operation that returns the original value if applied three times with the input, and retains the input if applied once. Why a kite flying at 1000 feet in "figure-of-eight loops" serves to "multiply the pulling effect of the airflow" on the ship to which it is attached? How to pick out specific parts of a list? In the final act, how to drop clues without causing players to feel "cheated" they didn't find them sooner? Both answers provided acceptable solutions. Python, allowing passing single string and list of string to a function. Plot multiple lines along with converging dotted line, Do starting intelligence flaws reduce the starting skill count. rev2023.7.5.43524. A function should select rows in a table based on the row name (column 2 in this case). Sample List : [ (2, 5), (1, 2), (4, 4), (2, 3), (2, 1)] Expected Result : [ (2, 1), (1, 2), (2, 3), (4, 4), (2, 5)] Click me to see the sample solution 7. rev2023.7.5.43524. **kwargs. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. solution b: use slicing to remove first element and check if the list is now empty. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. Find centralized, trusted content and collaborate around the technologies you use most. Is there are better looking solution than the ones I thought of? This is stacking a lot of random garbage to get a result through, essentially, API misuse. Raw green onions are spicy, but heated green onions are sweet. I know I could use isinstance() to check if it's a string, but I feel like there's a better way. Also, the previous version, if given a tuple or some other sequence, would just wrap it in a list. The index of the first element is 0, second element is 1 and so on. Negative Indexing in Python List - How to Use "-1" Parameter Connect and share knowledge within a single location that is structured and easy to search. Creating a Tuple A tuple is created by placing all the items (elements) inside parentheses (), separated by commas. Passing 'test' would try a lookup for mydict['t'], mydict['e'], etc. I could cast the argument to list: months = [months]. Do large language models know what they are talking about? Why are the perceived safety of some country and the actual safety not strongly correlated? The first argument is the index of the element before which to insert, so a.insert (0, x) inserts at the front of the list, and a.insert (len (a), x) is equivalent to a.append (x). 586), Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Testing native, sponsored banner ads on Stack Overflow (starting July 6), Temporary policy: Generative AI (e.g., ChatGPT) is banned, How can i store input in a list after a new line, How to print each element of a list in newline. Is there any political terminology for the leaders who behave like the agents of a bigger power? For example, languages = ["Python", "Swift", "C++"] # access item at index 0 print(languages [0]) # Python # access item at index 2 print(languages [2]) # C++ To learn more, see our tips on writing great answers. If I understand your question correctly, you could just split the result of raw_input(), like this? @Daenyth: thanks for your comment, missed that, see my edit. Is there an easier way to generate a multiplication table? Unit testing is more important than this level of syntatic nonsense. To get New Python Tutorials, Exercises, and Quizzes. In addition, more_itertools.one raises an error if the iterable is empty or has more than one item. Python Lists - GeeksforGeeks Any recommendation? Follow me on Twitter. python select specific elements from a list - Stack Overflow Python, allowing passing single string and list of string to a function Lottery Analysis (Python Crash Course, exercise 9-15). Pythonic way to get the single element of a 1-sized list. Raw green onions are spicy, but heated green onions are sweet. What conjunctive function does "ruat caelum" have in "Fiat justitia, ruat caelum"? Python program to find sum of elements in list Shivam_k Read Discuss Courses Practice Video Given a list of numbers, write a Python program to find the sum of all the elements in the list. What is the best way to visualise such data? Not the answer you're looking for? What syntax could be used to implement both an exponentiation operator and XOR? Does the DM need to declare a Natural 20? Developers use AI tools, they just dont trust them (Ep. With those in mind, we converted each element into a number using an int() function. Is Linux swap still needed with Ubuntu 22.04, Question of Venn Diagrams and Subsets on a Book, Looking for advice repairing granite stair tiles. It breaks the given input by the specified separator. Generating X ids on Y offline machines in a short time period without collision. Find centralized, trusted content and collaborate around the technologies you use most. Going further, the API should offer a default argument so that the caller can decide which iterable types are to be considered atomic. 586), Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Testing native, sponsored banner ads on Stack Overflow (starting July 6), Temporary policy: Generative AI (e.g., ChatGPT) is banned, Python: How to define a function that gets a list of strings OR a string. Is there an easier way to generate a multiplication table? List stores some values called elements in it, which can be accessed by their particular index. How to enter all the elements of a list in a single line without going on to new line in Python 4 Printing a list without line breaks (but with spaces) in Python I have run into this several times. How do I distinguish between chords going 'up' and chords going 'down' when writing a harmony? Would a passenger on an airliner in an emergency be forced to evacuate? python - Single string or list of strings in a method - Stack Overflow To learn more, see our tips on writing great answers. rev2023.7.5.43524. Non-anarchists often say the existence of prisons deters violent crime. list.pop([i]) One of the parameter is a comma-separated list of names. The Python stdlib does have a few such casesmost infamously, str.__mod__but most of those err in the other direction, explicitly requiring a tuple rather than any iterable, and most of them are considered to be mistakes, or at least things that wouldnt be added to the language today. Question of Venn Diagrams and Subsets on a Book. Difference between machine language and machine code, maybe in the C64 community? Make sure it's a list, then loop through it: def add_to_db (name_or_names): if isinstance (name_or_names, basestring): # str or unicode, convert to list name_or_names = [name_or_names] for name in name_or_names: add_name_to_db () Share. Convert string "Jun 1 2005 1:33PM" into datetime. Asking for help, clarification, or responding to other answers. How to resolve the ambiguity in the Boy or Girl paradox? Example 1: Get a list of numbers as input from a user and calculate the sum of it. Developers use AI tools, they just dont trust them (Ep. I just prefer to program defensively, so violations of requirements don't pass silently (sure it fails, but it fails loudly, which is much easier to identify and fix than subtle misbehaviors). Does the DM need to declare a Natural 20? Lists are defined in Python by enclosing a comma-separated sequence of objects in square brackets ( [] ), as shown below: >>> How Did Old Testament Prophets "Earn Their Bread"? In such a situation the usage of isinstance becomes error-prone and should be avoided. To generate it, I do this: However, I also want to allow the user to provide a single name. Generating X ids on Y offline machines in a short time period without collision, Is Linux swap still needed with Ubuntu 22.04. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. I'm dealing with a lot of methods that can accept a list of strings. Get a list of numbers as input from a user, Input a list using input() and range() function, Get a list of strings as an input from a user, Next, accept a list size from the user (i.e., the number of elements in a list), Add the current number to the list using the. @Cyber this was actually the point: don't fail silently if anything goes wrong and the list/sequence has more than 1 value. Developers use AI tools, they just dont trust them (Ep. Looking for advice repairing granite stair tiles. How to treat numbers in list as integers in function, Creating a function that takes a list or integer as argument (Python), Accept either int or tuple of ints as a python function parameter, Python Function with list as argument OR multiple values as argument. How can I specify different theory levels for different atoms in Gaussian? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Safe to drive back home with torn ball joint boot? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. To learn more, see our tips on writing great answers. How do you find the first key in a dictionary? dmitri shostakovich vs Dimitri Schostakowitch vs Shostakovitch. A simple wrapper could do, to handle list or single object case. Why do most languages use the same token for `EndIf`, `EndWhile`, `EndFunction` and `EndStructure`? Counter works in O(n) - thats about the best you can do to check all elements in a list - it just takes some more constant time (to setup the Counter object) and some space (to maintain inner dict) over this bit-shift thingy you found. How do you say "What about us?" For instance, why does Croatia feel so safe? We can add values of all types like integers, string, float in a single list.
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