How many spaces will be considered equal to one tab? What about tabs and spaces? In fact, many IDEs make various optimizations for the Tab key. Posted by 4 years ago. Thank you for your report Mikko. But of course in Python where indentation is a language requirement, it’s even worse. 0. You can use either spaces or tabs, not both. However this does not apply to Python 3 anymore - in Python 3 mixing of spaces and tabs are always an error - tabs only match tabs and spaces only match other spaces in indentation; that is a line indented with TABSPACESPACE can contain also lines indented with SPACESPACETAB; and might contain an indented block indented with TABSPACESPACETAB, but if it the indented block contained TABTAB, it would be considered an Python indentation The subject of Python source code indentation can be a contentious one. Since Tab displays differently in different environments and Space is always the same. Both tabs and spaces can be used for indentation, but you can't mix both! PEP 8 says: Or will it fail to work at all if tabs and spaces are mixed? Does making an ability check take an action? msg354795 - Author: Karthikeyan Singaravelan (xtreak) * Date: 2019-10-16 11:30; Seems related issue24260: msg354796 - Indentation cannot be split over multiple physical lines using backslashes; the whitespace up to the first backslash determines the indentation. Doing this can possibly cause a TabError, and your program will crash.Be consistent when you code - choose either to indent using tabs or spaces and follow your chosen convention throughout your program. To a programming language that is white-space sensitive language like Python, mixing tabs and spaces of different sizes can break the logical flow of programs. Tabs should be used solely to remain consistent with code that is already indented with tabs. And, most importantly - that famous secret weapon - Configuration Independent. Typewriters: tab key moves the cursor to the next tab stop; In Python, there's a tab stop at every 8 characters; 1 tab character = number of spaces until the next tab stop; Those indentation rules are great, but what about mixing tabs and spaces? I normally write code with tabs but many python libraries use spaces. So it’s very recommended that you use spaces instead of tabs. And here comes coder B, who uses an editor which renders tabs as 8 spaces… The code will look broken, you get the picture. 2. replace tab to spaces. :-), Python's interpretation of tabs and spaces to indent, Python 3 mixing of spaces and tabs are always an error, State of the Stack: a new quarterly update on community and product, Podcast 320: Covid vaccine websites are frustrating. It covers (among other things) the use of tabs/spaces. For fine typographic indentions (such as trying to line up each line of comments), WhiteSpace is also more precise. Python indentation is very important in python coding. This developer built a…, Nested for loops in python in a single line, Identation error on adding doc string to python code using sed, Python program written in Notepad++, error in TextWrangler. ). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. For other languages, I am not even sure. On a basic editor a few spaces and tab looks the same, but Python will not like it if you intermingle tabs and spaces. How do I change Eclipse to use spaces instead of tabs? I would need to look at my.emacs file. These This makes your python code debugging difficult.Generally, we use Tab or Space as python indentation character, but which one is best python indentation character? You can’t mix Tab and Space. And the code currently only work with python 2, partly because it mixes tabs and spaces. When using -tt these warnings become errors. Other Best Practices to Follow When Writing Code While indentation is paramount when attempting to write readable and appealing code, there are a number of other best practices you should follow. This can be 4 spaces, 1 tab or space. C++ syntax understanding issue for 'using', Difficulties in computing the derivatives of the Dirichlet distribution. How worried should I be about this cough? Python doesn't care either way as long as indentation is consistent (though there's a common misunderstanding that Python cares). and spaces. First is using method isspace(). Learn how your comment data is processed. Anthony Clink says: 15 Jun 17 at 11:11. but go you just use fmt…. In fact, there are shortcut keys to increase or decrease indentation in mainstream editors. Reliable ides solve the problem of increasing and decreasing indentation backward and forward, and even four Spaces, a backspace key can be completely backspaced, so there is no problem in terms of ease of use. Such bug was already reported early. Reliable ides solve the problem of increasing and decreasing indentation backward and forward, and even four Spaces, a backspace key can be completely backspaced, so there is no problem in terms of ease of use. What is the difference between Python's list methods append and extend? I use Kwrite sometimes, and there can be some issues that come up when switching between the two editors. Not necessarily. This is why mixing tabs and spaces, or even using tabs for indentation at all would be considered a very bad practice in Python. Four spaces are one tab (in my setup), but as far as I know, they are not interchanged. PS - It may feel like I am being picky here but hey, tabs = spaces has been established so every pro for Tabs matters. In Python, whitespace matters. How does the strong force increase in attraction as particles move farther away? When you indent in python, python just expects that indentation in first line should be the same as indentation in rest of the lines, be it 4 spaces, 1 space, 1 tab, or whatever. Your email address will not be published. Python Server Side Programming Programming. But it expects you to be consistent. Why does water weaken ion ion attractions? When invoking the Python command line interpreter with How to autoindent code that looks fine on github, but horribly indented in the editor? If you’d like to leave the tab-to-space settings as-is, you can instead use Edit > Blank Operations > TAB to space to convert your existing codebase to use only spaces, instead of a mixture. exclusively. the -t option, it issues warnings about code that illegally mixes tabs For Python, I always use spaces since whitespace is part of the syntax. The compiler benefits nothing from the amount of white spaces used at the beginning of each line (Python is an exception). In Python 3, the rules are slightly different (as noted by Antti Haapala). Note: The • character represents a space and the → character represents a tab. Tabs are better, IMO; the fact that you can configure your editor to match the amount of spaces you want each tab to represent makes them much better. Statically typed programming languages are sticklers when it comes to syntax. So, it does look better to write code in Spaces than in Tabs. Yes, the heuristic used in Python 3 is unable to catch all inconsistencies in using tabs and spaces. I use Emacs a lot, and its Python mode converts a keypress Tab into spaces, so it's a bit on the fence. ), Follow PEP 8 for Python style. Asking for help, clarification, or responding to other answers. How hard does atmospheric drag push on the ISS? Close. But you must use either a tab or a space to indent your code. The most popular way of indenting Python is with spaces only. Both of these are considered to be whitespaces when you code. Felipe analyzed 400,000 GitHub repositories, 1 billion files, and 14 terabytes of code to determine why spaces might be actually better than tabs. Simple. It is well known that in ASCII code, the Tab character’s encoding is 9 and the Space character’s encoding is 32. Next steps? The python3 "extra paragraph" quoted in the answer may sound nice, but it doesn't actually seem to work that way. Tabs are replaced (from left to right) by one to eight spaces such that the total number of characters up to and including the replacement is a multiple of eight (this is intended to be the same rule as used by Unix). Thanks for contributing an answer to Stack Overflow! Because if your python indentation does not match any outer indentation level, the python code may not prompt any error when editing, but the error ( for example: expected an indented block ) will be thrown when the python code execute. How many spaces you should use for indentation (4 spaces) How to indent the closing parentheses or brackets; What’s the recommended line length (79 characters for code, 72 characters for comment and docstrings) How to sort “import” statements (there are three groups), etc. second-most popular way is with tabs only. 0. Tabs should be used solely to remain consistent with code that is already indented with tabs.
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