"Signpost" puzzle from Tatham's collection. Python: how to add a list to an existing txt file and it has to include the commas in the text file? Because it lacks of the spaces before and after the string? VASPKIT and SeeK-path recommend different paths. My two cents. How to use "in" where clause in LINQ where the string set will be supplied by a list? [4 of B, 1 of G]. What were the poems other than those by Donne in the Melford Hall manuscript? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Use the int () class to convert each string to an integer. Creating a comma separated list from IList or IEnumerable. My phone's touchscreen is damaged. 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. rev2023.4.21.43403. Can I general this code to draw a regular polyhedron? On what basis are pardoning decisions made by presidents or governors when exercising their pardoning power? What differentiates living as mere roommates from living in a marriage-like relationship? Connect and share knowledge within a single location that is structured and easy to search. Connect and share knowledge within a single location that is structured and easy to search. What is Wario dropping at the end of Super Mario Land 2 and why? Find centralized, trusted content and collaborate around the technologies you use most. Would you ever say "eat pig" instead of "eat pork"? What is Wario dropping at the end of Super Mario Land 2 and why? ','.join(list_of_strings) ). 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. Just sayin' You are usually better off using the tools in the library for csv. This question also assumes you are only working with numbers: How to convert list into string with quotes in python. The issue is, I usually finish writing my list, and then go in and add single quotes to every element in the list. Which one to choose? 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. 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. Not the answer you're looking for? Looking for job perks? It is a bit perl-y, but it works like a charm. What are the advantages of running a power tool on 240 V vs 120 V? How do I split a list into equally-sized chunks? "Signpost" puzzle from Tatham's collection, Literature about the category of finitary monads, Limiting the number of "Instance on Points" in the Viewport. 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. Here is a alternative solution in Python 3.0 which allows non-string list items: NOTE: The space after comma is intentional. What woodwind & brass instruments are most air efficient? Well but what to do if the List does not have quotes? Then I'm using readlines () converted to list of strings. 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. :) You are right. 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.). You can use this function to convert comma-delimited single character strings to list- def stringtolist (x): mylist= [] for i in range (0,len (x),2): mylist.append (x [i]) return mylist Share Improve this answer Follow edited Jan 30, 2019 at 2:43 answered Jan 30, 2019 at 1:55 Hemang Jalali 11 2 Add a comment 0 Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. What woodwind & brass instruments are most air efficient? What does "up to" mean in "is first up to launch"? It also will only process a flat list of strings; the other approaches can handle complex nested data structures. 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. Are double and single quotes interchangeable in JavaScript? When a gnoll vampire assumes its hyena form, do its HP change? How to output a comma delimited list in jinja python template? rev2023.4.21.43403. 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. What does the power set mean in the construction of Von Neumann universe? I think there's an XY problem here. Evaluate an expression node or a string containing only a Python literal or container display. Use this tool to convert a column into a Comma Separated List. Futuristic/dystopian short story about a man living in a hive society trying to meet his dying mother. This solution doesn't fulfill the requirements of not adding extra comma for empty string and adding a 'None' with NoneType. What were the most popular text editors for MS-DOS in the 1980s? Can you still use Commanders Strike if the only attack available to forego is an attack against an ally? Has depleted uranium been considered for radiation shielding in crewed spacecraft beyond LEO? 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 would like to provide a more intuitive patterning solution with regex. Did the drapes in old theatres actually say "ASBESTOS" on them? Can my creature spell be countered if I cast a split second spell after it? How do I break a string in YAML over multiple lines? The more items you have to flatten chain does it a bit more efficiently: I think this was the easiest way (thanks to a friend who helped with this). Solution by Jay Riggs is correct for the original poster's situation. +1. How a top-ranked engineering school reimagined CS curriculum (Ep. Not sure how this is related to the question @Tomerikoo string representation of list is exactly the same only it's in the file. 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. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Looking for job perks? How do I parse a string to a float or int? Is there a quick function that I'm not aware of? Remove empty strings from a list of strings, Generic Doubly-Linked-Lists C implementation. I have a list of ints and want to create a comma-separated string. Not the answer you're looking for? Generic Doubly-Linked-Lists C implementation. Cautionary note: this could potentially be dangerous if any of the strings inside list has a comma in between. When a gnoll vampire assumes its hyena form, do its HP change? There isn't any need to import anything or to evaluate. Does Python have a string 'contains' substring method? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Checks and balances in a 3 branch market economy. If this is not what you wanted, the regexp needs to be souped up a bit. I have two stored sting variable I need to concat into a different variable for an api get request. You need the double quotes on your string. Thanks for contributing an answer to Stack Overflow! 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. So using split (',') creates problems. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? How do I read / convert an InputStream into a String in Java? My phone's touchscreen is damaged. What does the power set mean in the construction of Von Neumann universe? On what basis are pardoning decisions made by presidents or governors when exercising their pardoning power? Asking for help, clarification, or responding to other answers. :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 Thanks. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Just some data with apostrophe is all I wanted. Find centralized, trusted content and collaborate around the technologies you use most. 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. 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 What is the python "with" statement designed for? Looking for job perks? Creating comma-separated string from list [duplicate], TypeError: sequence item 0: expected string, int found. 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!) Not the answer you're looking for? How would you make a comma-separated string from a list of strings? How to convert comma-separated String to List? How to combine several legends in one frame? Note if you are using python 2.7 (which you shouldn't by now) then using str will raise an exception if any item in the list has unicode. 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. Example: str_inp = "Hello,from,AskPython' To convert these types of strings to a list of elements, we have some other ways of performing the task. The json module is a better solution whenever there is a stringified list of dictionaries. VASPKIT and SeeK-path recommend different paths. Effect of a "bad grade" in grad school applications. Syntax Breakdown of the split () Method in Python The general syntax for the split () method is the following: But if you want to show off with logic :) : Unless I'm missing something, ','.join(foo) should do what you're asking for. Counting and finding real solutions of an equation, 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. Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. How to convert a sequence of integers into a monomial, Limiting the number of "Instance on Points" in the Viewport. It breaks the given input by the specified separator. "Signpost" puzzle from Tatham's collection. Instead, you can use. Would you ever say "eat pig" instead of "eat pork"? A quick but not effective solution on Jupyter NB's is, highlighting your list elements and pressing the single quote on your keyboard. data = ['a, b', 'c', 'd, e'] print ( [value.split (',') for value in data]) This gives us ['a', ' b'], ['c'], ['d', ' e']] To get rid of those extra whitespaces we can modify the function by using map to apply str.strip to each resulting element of the inner . Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, This solution works only with lists, don't handle the case of empty or one-element lists, and uses, @Daniel: don't disagree at all. Python string functions are very popular. Asking for help, clarification, or responding to other answers. Counting and finding real solutions of an equation. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Doesn't this work? A minor scale definition: am I missing something? Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. Why is it string.join(list) instead of list.join(string)? How would you make a comma-separated string from a list of strings? What is scrcpy OTG mode and how does it work? How is white allowed to castle 0-0-0 in this position? Ethical standards in asking a professor for reviewing a finished manuscript and publishing it together. How do I get the number of elements in a list (length of a list) in Python? Not the answer you're looking for? This is a perfectly valid answer. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. You can do this in one line for most basic use cases, including the one given in the original question. The split () method splits a string into a list, where each list item is each word that makes up the string. How to check whether a string contains a substring in JavaScript? On whose turn does the fright from a terror dive end? wasn't aware of the eval danger when answer was posted. Interpreting non-statistically significant results: Do we have "no evidence" or "insufficient evidence" to reject the null? str.join only accepts an iterable of strings, not one of integers. @EeroAaltonen I updated My answer, Thanks for pointing me to right. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I don't think the ToArray() call is necessary. What does 'They're at four. Short story about swapping bodies as a job; the person who hires the main character misuses his body. Looking for job perks? Not the answer you're looking for? Creating a comma separated list from IList or IEnumerable, Convert a String representation of a Dictionary to a dictionary. Connect and share knowledge within a single location that is structured and easy to search. This is an open invitation to arbitrary code execution, NEVER do this or anything like it unless you know with absolute certainty that the input will always be 100% trusted. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The manual method is simply not as powerful, and does less work, so it's not surprising that it's faster. To learn more, see our tips on writing great answers. How to create a virtual ISO file from /dev/sr0. Why is it string.join(list) instead of list.join(string)? But isn't that too much/complicated compared to other answers? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Thanks for contributing an answer to Stack Overflow! My phone's touchscreen is damaged. Beginner kit improvement advice - which lens should I consider? Find centralized, trusted content and collaborate around the technologies you use most. Step-by-step approach: Import the re module. 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 I made up some test list, I didn't really mean to say test's. 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. Stepwise explanation: What woodwind & brass instruments are most air efficient? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. It is also possible to use writer.writerows(iterable) to output multiple rows to csv. But the code was getting very kludgy. What was the actual cockpit layout and crew of the Mi-24A? The focus of my answer was purely on, This shouldn't have a downvote. It works with integers, strings (with 'crazy characters' as well) and it's just 1 line of code. However I just learned how to create extensions. Why? Why does Acts not mention the deaths of Peter and Paul? My requirement, bringing me here, was to fill an SQL "WHERE x NOT IN ()" clause. In this tutorial, we'll explore different approaches for ignoring commas inside quotes when splitting a comma-separated String. Which was the first Sci-Fi story to predict obnoxious "robo calls"? How a top-ranked engineering school reimagined CS curriculum (Ep. update: I got it to work as below, but I would prefer a cleaner way if possible. 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. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Connect and share knowledge within a single location that is structured and easy to search. Which was the first Sci-Fi story to predict obnoxious "robo calls"? There exists an element in a group whose order is at most the number of conjugacy classes, Tikz: Numbering vertices of regular a-sided Polygon. Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower? 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. You may run into such problem while dealing with scraped data stored as Pandas DataFrame. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. How do I make the first letter of a string uppercase in JavaScript? From the docs: str.join (iterable) On whose turn does the fright from a terror dive end? English version of Russian proverb "The hedgehogs got pricked, cried, but continued to eat the cactus", Counting and finding real solutions of an equation, Tikz: Numbering vertices of regular a-sided Polygon. - 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. The join() function will insert any string you like between elements but does nothing for each end of the list. Did the Golden Gate Bridge 'flatten' under the weight of 300,000 people in 1987? Unexpected uint64 behaviour 0xFFFF'FFFF'FFFF'FFFF - 1 = 0? Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower? Making statements based on opinion; back them up with references or personal experience. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, Python: How to add single quotes to a long list, How do I add quotes to list element which contain / in python. Looking for job perks? The accepted answer is simple, direct and clearly the best solution. my_list = [1, baz, ctrl, 4 ]) and throws a NameError message. Not the answer you're looking for? Is it possible to control it remotely? How do I split a list into equally-sized chunks? enjoy another stunning sunset 'over' a glass of assyrtiko. How about saving the world? Use a list comprehension to iterate over the list of strings. i want to sort the list of objects based on the attribute of that object without considering the special characters. Find centralized, trusted content and collaborate around the technologies you use most. 2. 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. Not the answer you're looking for? You can get a pretty good. How to convert string representation of list to a list. And if the list contains non-string types (such as integers, floats, bools, None) then do: Why the map/lambda magic? The following: How do I create the string? What was the actual cockpit layout and crew of the Mi-24A? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Why in the Sierpiski Triangle is this set being used as the example for the OSC and not a more "natural"? Connect and share knowledge within a single location that is structured and easy to search. Python 3.7. You can always encode quotes before you build your string. Linux), you can omit the trailing '-'. Why did US v. Assange skip the court of appeal? Convert string representation of list to list in Python. Obviously it gets more complicated if you need to quote/escape commas etc in the values. This works for ints but not for strings in my case because each string is single quoted not double quoted, sigh. How to remove an element from a list by index, Creating a comma separated list from IList or IEnumerable. 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" """ @timgeb, Python list of strings to 1 string separated by comma & quotes (, & "). It will not handle escape sequences in the strings, or a different quote type. Word order in a sentence with two clauses, Checks and balances in a 3 branch market economy, Tikz: Numbering vertices of regular a-sided Polygon, English version of Russian proverb "The hedgehogs got pricked, cried, but continued to eat the cactus", How to create a virtual ISO file from /dev/sr0. '*len(record_hash)), record_hash). Connect and share knowledge within a single location that is structured and easy to search. How about saving the world? The first time I learned extensions I thought it was pretty awesome too. Did the Golden Gate Bridge 'flatten' under the weight of 300,000 people in 1987? 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. Which one to choose? How is white allowed to castle 0-0-0 in this position? What is scrcpy OTG mode and how does it work? In case if there are numbers in the list, you could use list comprehension: ",".join(l) will not work for all cases. I think it would make a valuable addition to the answer. How can I use format() to print out nested lists as a table? To learn more, see our tips on writing great answers. What was the actual cockpit layout and crew of the Mi-24A? Paste your comma separated list wherever you wish. Method 1: Using str.split (',') For eg. Why is reading lines from stdin much slower in C++ than Python? Stack Overflow . See screenshots below: 2. Which was the first Sci-Fi story to predict obnoxious "robo calls"? How a top-ranked engineering school reimagined CS curriculum (Ep. Execute SQL for different where clause from Python. String is enclosed either with single quotes or double quotes. Thus, you need to convert the items in x into strings. In this example, the list element baz would throw: I tried this question on SO, but it only works if your list already contains strings: Join a list of strings in python and wrap each string in quotation marks. @SerialDownvoter: Can you please respond on posts that you downvote? Since you are appending the returned list to newlist, you are getting a list of lists. What does "up to" mean in "is first up to launch"? 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". 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. Why can't the change in a crystal structure be due to the rotation of octahedra? This is superfluous. Use the StringIO Module to Convert a List to a Comma-Separated String in Python. Parabolic, suborbital and ballistic trajectories all follow elliptic paths. Making statements based on opinion; back them up with references or personal experience. You can parse and clean up this list as needed using list comprehension. How do I append one string to another in Python? Is it possible to control it remotely? e.g. Embedded hyperlinks in a thesis or research paper. Find centralized, trusted content and collaborate around the technologies you use most. mylist = [1,2,3]. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? Is it safe to publish research papers in cooperation with Russian academics? Python, How to convert string representation of list to a list, How to read a text file into a list or an array with Python. Using the JOIN () method is the recommended method to convert the List to String. Ethical standards in asking a professor for reviewing a finished manuscript and publishing it together, How to convert a sequence of integers into a monomial. How do I replace all occurrences of a string in JavaScript? 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. 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. 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. now the s is 'test's','test','test's more' Not the answer you're looking for? Making statements based on opinion; back them up with references or personal experience. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? rev2023.4.21.43403. find Item wise max sales on which month in python series? I could manually convert every element from int to string, insert this into a new list, and then do the join on this new list, but I'm wondering if there is a cleaner solution. Making statements based on opinion; back them up with references or personal experience. Not the answer you're looking for? Find centralized, trusted content and collaborate around the technologies you use most. 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. Is it possible to control it remotely? I want to convert it to one new string looking like: new_string=""" "A", "List", "Of", "Strings" """, ( How to use python change a string into list cut by ','? How do I make the first letter of a string uppercase in JavaScript? So if someone puts a call to delete everything in there, it happily will. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, @IoannisFilippidis - Using a list comprehension is more efficient with. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, Python - split list element containing character (e.g. So this works: nameString = '"{}"'.format('", "'.join(nameList)) Those are single quotes enclosing the desired double quoted strings. I'd like to split the string on commas; however, in the case where something is inside double quotation marks, I need it to both ignore commas and strip out the quotation marks. Tikz: Numbering vertices of regular a-sided Polygon, Ethical standards in asking a professor for reviewing a finished manuscript and publishing it together. ', referring to the nuclear power plant in Ignalina, mean? Then you split the cleaned string on single or double quotes and take the non-empty values (or odd indexed values, whatever the preference). This will not work if your string list is a list of lists. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. Paste the column here (into the leftmost textbox) Copy your comma separated list from the rightmost textbox. Generate points along line, specifying the origin of point generation in QGIS, Counting and finding real solutions of an equation. if last: is just a pythonic way of checking if last is empty. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. Are double and single quotes interchangeable in JavaScript?
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