python list to comma separated string with single quotes

i want to sort the list of objects based on the attribute of that object without considering the special characters. Connect and share knowledge within a single location that is structured and easy to search. I was wondering what the simplest way is to convert a string representation of a list like the following to a list: Even in cases where the user puts spaces in between the commas, and spaces inside of the quotes, I need to handle that as well and convert it to: I know I can strip spaces with strip() and split() and check for non-letter characters. my_list = [1, baz, ctrl, 4 ]) and throws a NameError message. The string or node provided may only consist of the following Python literal structures: strings, bytes, numbers, tuples, lists, dicts, sets, booleans, None and Ellipsis. The manual method is simply not as powerful, and does less work, so it's not surprising that it's faster. This does not work if you have a list of words that you want to turn to strings, however; Python thinks you are calling variables (e.g. Parabolic, suborbital and ballistic trajectories all follow elliptic paths. This question is just for educational purposes. How a top-ranked engineering school reimagined CS curriculum (Ep. How about saving the world? Generic Doubly-Linked-Lists C implementation. Making statements based on opinion; back them up with references or personal experience. How can I randomly select an item from a list? 2. is safer and quite Pythonic, though the resulting string will be difficult to parse if the elements can contain commas -- at that point, you need the full power of the csv module, as Douglas points out in his answer.). Can I general this code to draw a regular polyhedron? Embedded hyperlinks in a thesis or research paper. My phone's touchscreen is damaged. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, List of tuples to a string with spaces and punctuations in the right places. In Python 2, it can be imported directly using the StringIO module. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. - Paulo Scardine Jul 3, 2014 at 15:32 Add a comment 3 Answers Sorted by: 14 str.join only accepts an iterable of strings, not one of integers. Find centralized, trusted content and collaborate around the technologies you use most. What is the difference between String and string in C#? Making statements based on opinion; back them up with references or personal experience. Use a list comprehension to iterate over the list of strings. Every item in string to item in list in Python, Converting a Comma Separated String to a List of Strings in Python, How to append multiple strings from a single input into a list in Python, How do you explicitly convert a string to a list. How to convert list lookalike into a list? How do I split a list into equally-sized chunks? Each item is surrounded by quotes ("), but the items can also contain commas (,). Why can't the change in a crystal structure be due to the rotation of octahedra? I'm newbie, so I'd like to know the limitations of this method. Find centralized, trusted content and collaborate around the technologies you use most. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Python PostgreSQL Statement Problem psycopg2 cursor.execute(Table Union). The accepted answer is simple, direct and clearly the best solution. How would you make a comma-separated string from a list of strings? Can my creature spell be countered if I cast a split second spell after it? Very interesting, thank you for noting this. @SerialDownvoter: Can you please respond on posts that you downvote? How to convert comma-delimited string to list in Python? This will not work if your string list is a list of lists. Why did US v. Assange skip the court of appeal? Convert string "Jun 1 2005 1:33PM" into datetime. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. How about saving the world? What were the most popular text editors for MS-DOS in the 1980s? Find centralized, trusted content and collaborate around the technologies you use most. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. Converting a list into comma-separated string with "and" before the last item - Python 2.7. Doesn't this work? What does "up to" mean in "is first up to launch"? Return a list of the words in the string, using sep as the delimiter string. python string list to list ast.listeral_eval, Converting a string that represents a list, into an actual list object. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, Converting a string representation of a list into an actual list object. On what basis are pardoning decisions made by presidents or governors when exercising their pardoning power? Is there a quick function that I'm not aware of? Futuristic/dystopian short story about a man living in a hive society trying to meet his dying mother, English version of Russian proverb "The hedgehogs got pricked, cried, but continued to eat the cactus". How would you make a comma-separated string from a list of strings? '*len(record_hash)), record_hash). To tackle the problem of the comma separation we can split each string in the list. @wim agree, it's pretty bad. Since you are appending the returned list to newlist, you are getting a list of lists. Evaluate an expression node or a string containing only a Python literal or container display. Then you split the cleaned string on single or double quotes and take the non-empty values (or odd indexed values, whatever the preference). It is a bit perl-y, but it works like a charm. Did the drapes in old theatres actually say "ASBESTOS" on them? Generic Doubly-Linked-Lists C implementation. Syntax Breakdown of the split () Method in Python The general syntax for the split () method is the following: What was the purpose of laying hands on the seven in Acts 6:6. How do I make a flat list out of a list of lists? How to output a comma delimited list in jinja python template? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. split () splits a string into a list. How do I merge two dictionaries in a single expression in Python? I would say the csv library is the only sensible option here, as it was built to cope with all csv use cases such as commas in a string, etc. How to convert a string with comma-delimited items to a list in Python? Why is reading lines from stdin much slower in C++ than Python? It uses the solution by RootTwo given in a comment on that answer: It's generally bad practice to use + when combining strings, as it is generally slow. 3 lines of code can accomplish this and you add a library? Asking for help, clarification, or responding to other answers. How would you make a comma-separated string from a list of strings? Can someone explain why this point is giving me 8.3V? But it's simple, doesn't involve a dangerous eval, and might be good enough for your purpose if you're on an older Python without ast. How do I replace all occurrences of a string in JavaScript? If you know that your lists only contain quoted strings, this pyparsing example will give you your list of stripped strings (even preserving the original Unicode-ness). Why? Asking for help, clarification, or responding to other answers. Generate points along line, specifying the origin of point generation in QGIS, Counting and finding real solutions of an equation. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Not the answer you're looking for? What was the actual cockpit layout and crew of the Mi-24A? How would you make a comma-separated string from a list of strings? What is Wario dropping at the end of Super Mario Land 2 and why? Here is a alternative solution in Python 3.0 which allows non-string list items: NOTE: The space after comma is intentional. I have two stored sting variable I need to concat into a different variable for an api get request. I usually end up using something like ''.join(map(lambda x: x+',',l))[:-1], but also feeling somewhat unsatisfied. Use this tool to convert a column into a Comma Separated List. To learn more, see our tips on writing great answers. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. It breaks the given input by the specified separator. If total energies differ across different software, how do I decide which software to use? Thanks for contributing an answer to Stack Overflow! It isn't to everyone's taste, but I like to create helper extensions for these kinds of tasks, and put them into a "utility" namespace: Using string interpolation. If this is not what you wanted, the regexp needs to be souped up a bit. Why does Acts not mention the deaths of Peter and Paul? How to create a virtual ISO file from /dev/sr0. Just sayin' You are usually better off using the tools in the library for csv. Why typically people don't use biases in attention mechanism? To learn more, see our tips on writing great answers. If user should only enter list of numeric, I think this is the safest way to go to stop malicious intend user. Generate points along line, specifying the origin of point generation in QGIS. I tried to use the join function, but i didn't manage to do it properly: json.loads() and json.dumps() from json package is the equivalent way of javascript JSON.parse() and JSON.stringify() so use json solution to keep life simpler. Just modify the argument to join so that each element is converted to a string: Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Find centralized, trusted content and collaborate around the technologies you use most. Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? rev2023.4.21.43403. How do I stop the Flickering on Mode 13h? When a gnoll vampire assumes its hyena form, do its HP change? How do I count the occurrences of a list item? Looking for job perks? Looking for job perks? How do I make a flat list out of a list of lists? A minor scale definition: am I missing something? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. How do I create a directory, and any missing parent directories? Embedded hyperlinks in a thesis or research paper. How can I convert this string to list of lists? How to convert comma-delimited string to list in Python? To learn more, see our tips on writing great answers. This can also be written more compactly as: wrap the result of your commands in quotes? How do I concatenate two lists in Python? "Least Astonishment" and the Mutable Default Argument. Counting and finding real solutions of an equation. This works for ints but not for strings in my case because each string is single quoted not double quoted, sigh. If we are sure single quotes will be start and end of string then we can remove using string method for (String strFinal: str.split (',')) { System.debug ('===Final val==='+strFinal.removeStart ('\'').removeEnd ('\'')); } Share Improve this answer Follow edited Apr 12, 2016 at 7:32 answered Apr 11, 2016 at 13:49 Ratan Paul 22.3k 12 48 92 How do I replace all occurrences of a string in JavaScript? eval is not recommended in several places on this thread as it will simple run as code whatever is entered, presenting a security risk. Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence? And if you're really looking to enclose the whole thing in single quotes: This may be easier than using string.replace. Instead use list.extend method, like this for word in lines: newlist.extend (word.split (",")) But you can simply use nested list comprehension like this And so you can change it to: def create_list (data): return list (str (data)) I find it easier to read create_command if you merge some of the lines together: Why is it string.join(list) instead of list.join(string)? If total energies differ across different software, how do I decide which software to use? When generating a list by hand, I generally start by creating a variable (e.g. What is Wario dropping at the end of Super Mario Land 2 and why? That is, how do you map, for instance, ['a', 'b', 'c'] to 'a,b,c'? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. However i need the output like this Looking for job perks? Why did US v. Assange skip the court of appeal? Would you ever say "eat pig" instead of "eat pork"? To solve that, you can either test the length of the list ( if len (items) >= 2: ), or do this, which (imho) is slightly more pythonic: def comma (items): start, last = items [:-1], items [-1] if start: return " {}, and {}".format (", ".join (start), last) else: return last Comma-separated string to list in Python First of all, we will store a comma-separated string in a variable comma_string. Use the int () class to convert each string to an integer. How do I make the first letter of a string uppercase in JavaScript? rev2023.4.21.43403. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Given a List of String, the task is to convert the List to a comma separated String in Java. @timgeb, Python list of strings to 1 string separated by comma & quotes (, & "). Futuristic/dystopian short story about a man living in a hive society trying to meet his dying mother. Solution by Jay Riggs is correct for the original poster's situation. What are you trying to achieve by building this string? How to combine several legends in one frame? Why does Acts not mention the deaths of Peter and Paul? When there are 1+ items in the list (if not, just use the first element): Edit: If you need an Oxford comma (didn't know it even existed!) It's worth noting that this answer was posted over 13 years ago. Connect and share knowledge within a single location that is structured and easy to search. I hope this is not considered Pythonic :), my (and @wim's) comment above applies to @Daniel's original answer which he replaced with the completely different, and novel, approach currently listed above. However I just learned how to create extensions. i have a list and want it as a string with quotes To do a Join From List to a String separated with commas we need to do the following: String someStringVar = String.join (SomeList, ','); But If I want to make a Join with Comma and Quotes? So this works: nameString = '"{}"'.format('", "'.join(nameList)) Those are single quotes enclosing the desired double quoted strings. What woodwind & brass instruments are most air efficient? How a top-ranked engineering school reimagined CS curriculum (Ep. If you input data has DOS-style line endings (as @phk suggested), you can modify the command as follows: sed 's/\r//;s/^\|$/"/g'|paste -sd, - Share Improve this answer Follow edited Jan 17, 2017 at 21:04 answered Jan 17, 2017 at 18:56 zeppelin 3,752 9 21 2 If some IDE could give plugin support will be better, something like emmet, really doubt anyone will use program to generate it when coding. Copy your column of text in Excel. Embedded hyperlinks in a thesis or research paper, Checks and balances in a 3 branch market economy, How to create a virtual ISO file from /dev/sr0. How can I make a dictionary (dict) from separate lists of keys and values? Asking for help, clarification, or responding to other answers. So, following all the answers I decided to time the most common methods: You can save yourself the .strip() function by just slicing off the first and last characters from the string representation of the list (see the third line below): And with pure Python - not importing any libraries: This is another solution if you don't want to import any library: The caveat to this method is that it doesn't work if you have comma inside your string for example if your input is. Python: how to add a list to an existing txt file and it has to include the commas in the text file? The json.loads(your_data) function can be used to convert it to a list. I would like to provide a more intuitive patterning solution with regex. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This solution doesn't produce the expected output. This should be applicable to lists with any length. -- just use: ", and" instead: Also as an aside the Pythonic way to write. Why is it string.join(list) instead of list.join(string)? The following: How do I create the string? Is there a generic term for these trajectories? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. If you have 2.6 or newer, use ast instead of eval: If you're on an older version of Python, you can get very close to what you want with a simple regular expression: This isn't as good as the ast solution, for example it doesn't correctly handle escaped quotes in strings. I have a string for items separated by comma. I have a list of strings: Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence. mylist = [1,2,3]. Tikz: Numbering vertices of regular a-sided Polygon. That involves too many keystrokes, I think. Well but what to do if the List does not have quotes? To learn more, see our tips on writing great answers. So basically, the output would be this list of strings: ['A', 'B', 'C', 'D12121', 'E', 'F', 'G', 'H', 'I9,I8', 'J', 'K'] Asking for help, clarification, or responding to other answers. It is not capable of evaluating arbitrarily complex expressions, for example involving operators or indexing. Embedded hyperlinks in a thesis or research paper. This example is compatible with Python 3, as the other answer here used StringIO which is Python 2. Which was the first Sci-Fi story to predict obnoxious "robo calls"? Not the answer you're looking for? :param string: A string to be split into chunks :param separator: A separator character :param quote: A character to define beginning and end of the quoted string :return: A list of strings, one element for every chunk """ comma_separated_list = [] chunk = '' in_quotes = False for character in How do I parse a string to a float or int? /,[]) and create new elements, How to remove special character in a list of string and split it into separate elements. What were the most popular text editors for MS-DOS in the 1980s? Generate points along line, specifying the origin of point generation in QGIS, Futuristic/dystopian short story about a man living in a hive society trying to meet his dying mother, Embedded hyperlinks in a thesis or research paper. Why can't the change in a crystal structure be due to the rotation of octahedra? Why in the Sierpiski Triangle is this set being used as the example for the OSC and not a more "natural"? Beginner kit improvement advice - which lens should I consider? :) You are right. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. From the docs: Return a string which is the concatenation of the strings in the iterable iterable. How to convert string representation of list to a list. If total energies differ across different software, how do I decide which software to use? Python list of strings to 1 string separated by comma & quotes (, & ") Asked 4 years, 3 months ago Modified 4 years, 3 months ago Viewed 825 times 0 I have a list of strings: list_of_strings = ["A", "List", "Of", "Strings"] I want to convert it to one new string looking like: new_string=""" "A", "List", "Of", "Strings" """ Remove empty strings from a list of strings, Generic Doubly-Linked-Lists C implementation. What is the Russian word for the color "teal"? What is the difference between String and string in C#? There are two ways to represent strings in python. Find centralized, trusted content and collaborate around the technologies you use most. You need the double quotes on your string. Looking for job perks? But isn't that too much/complicated compared to other answers? Notice the method doesn't play well with empty lists. (The cases ['s'] and [] should be mapped to 's' and '', respectively.). Counting and finding real solutions of an equation, Generate points along line, specifying the origin of point generation in QGIS. Is it possible to control it remotely? Thanks for contributing an answer to Stack Overflow! Select a blank cell adjacent to the list's first data, for instance, the cell C1, and type this formula =CONCATENATE (TRANSPOSE (A1:A7)&",") ( A1:A7 is the column you will convert to comma serrated list, "," indicates the separator you want to separate the list). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. How to check whether a string contains a substring in JavaScript? Beginner kit improvement advice - which lens should I consider? Making statements based on opinion; back them up with references or personal experience. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How do I split a list into equally-sized chunks? Why is it string.join(list) instead of list.join(string)? Is there a generic term for these trajectories? Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. To learn more, see our tips on writing great answers. update: I got it to work as below, but I would prefer a cleaner way if possible. Another way to convert a string to a list is by using the split () Python method. Looking for job perks? Connect and share knowledge within a single location that is structured and easy to search. rev2023.4.21.43403. How a top-ranked engineering school reimagined CS curriculum (Ep. Which was the first Sci-Fi story to predict obnoxious "robo calls"? How to convert a sequence of integers into a monomial, Limiting the number of "Instance on Points" in the Viewport. How to have multiple colors with a single material on a single object? Ethical standards in asking a professor for reviewing a finished manuscript and publishing it together. On whose turn does the fright from a terror dive end? To learn more, see our tips on writing great answers. rev2023.4.21.43403. This does not work if you have a list of words that you want to turn to strings, however; Python thinks you are calling variables (e.g. letters = ['a', 'b', 'c', 'd'] string = ','.join (letters) print (string) After running the preceding code, we get the following output: The join () method creates a string where the individual list items are separated by a given separator character. From the docs: str.join (iterable) Are double and single quotes interchangeable in JavaScript? How about saving the world? You can do this in one line for most basic use cases, including the one given in the original question. Futuristic/dystopian short story about a man living in a hive society trying to meet his dying mother, Ethical standards in asking a professor for reviewing a finished manuscript and publishing it together. How is white allowed to castle 0-0-0 in this position? Connect and share knowledge within a single location that is structured and easy to search. How do I convert a String to an int in Java? 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. Find centralized, trusted content and collaborate around the technologies you use most. @EeroAaltonen I updated My answer, Thanks for pointing me to right. Has depleted uranium been considered for radiation shielding in crewed spacecraft beyond LEO? Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. It isn't to everyone's taste, but I like to create helper extensions for these kinds of tasks, and put them into a "utility" namespace: public static class . A comma-separated string is a string that has a sequence of characters, separated by a comma, and enclosed in Python's string quotations. 257. How to concatenate (join) items in a list to a single string. How do I get the number of elements in a list (length of a list) in Python? Connect and share knowledge within a single location that is structured and easy to search. Initialize the string to be split, test_str. A quick but not effective solution on Jupyter NB's is, highlighting your list elements and pressing the single quote on your keyboard. What woodwind & brass instruments are most air efficient? You can use either map or a list comprehension: If you are dealing with a csv file that is something other than the trivial example here, please do remember you are better off using the csv module to read and write csv, since CSV can be surprisingly complex. Are there any canonical examples of the Prime Directive being broken that aren't shown on screen? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. How can I split this text properly in Python? Instead use list.extend method, like this, But you can simply use nested list comprehension like this. Careful though, splitting an empty string does not return what one might have expected: Hope It will solve issue but please add explanation of your code with it so user will get perfect understanding which he/she really wants. How would you count occurrences of a string (actually a char) within a string? Can you still use Commanders Strike if the only attack available to forego is an attack against an ally? What does the power set mean in the construction of Von Neumann universe? Unexpected uint64 behaviour 0xFFFF'FFFF'FFFF'FFFF - 1 = 0? Unexpected uint64 behaviour 0xFFFF'FFFF'FFFF'FFFF - 1 = 0? the str.join answer is OK if your list is guaranteed to have only integers - for anything serious use the csv module, it will handle a lot of corner cases. How to use "in" where clause in LINQ where the string set will be supplied by a list? The issue is, I usually finish writing my list, and then go in and add single quotes to every element in the list. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Parabolic, suborbital and ballistic trajectories all follow elliptic paths. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. Does Python have a string 'contains' substring method? 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. Convert string representation of list to list in Python. Making statements based on opinion; back them up with references or personal experience. Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower? Not the answer you're looking for? Looking for job perks? (The JSON method demands double-quotes, but does process escape sequences.) str.join only accepts an iterable of strings, not one of integers. list_of_strings = ["A", "List", "Of", "Strings"]. Why is it string.join(list) instead of list.join(string)? You can take input as string and split it to list How to create a virtual ISO file from /dev/sr0. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, @Julien I think you deleted it because it can be directly be a list, instead of a string (and if wanted a string do. Unwanted whitespaces in the list elements may be removed in this way: Inspired from some of the answers above that work with base Python packages I compared the performance of a few (using Python 3.7.3): I was disappointed to see what I considered the method with the worst readability was the method with the best performance there are trade-offs to consider when going with the most readable option for the type of workloads I use Python for I usually value readability over a slightly more performant option, but as usual it depends. How do I split a list into equally-sized chunks? In case if there are numbers in the list, you could use list comprehension: ",".join(l) will not work for all cases. Did the Golden Gate Bridge 'flatten' under the weight of 300,000 people in 1987? The StringIO object is similar to a file object but in memory to work with texts. I am not working on a particular project at the moment. Are double and single quotes interchangeable in JavaScript? pyparsing includes a predefined expression for comma-separated lists: >>> from pyparsing import commaSeparatedList >>> s = "1,,2'3,4'" >>> print commaSeparatedList.parseString (s).asList () ['1', '', "2'3", "4'"] Hmm, looks like you have a typo in your data, missing a comma after the 2:

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