precision p-1 would have exponent exp. If its a number, it refers to a positional argument, and if its a keyword, Forces the field to be centered within the available ('0') character enables Number. Python format () function is an in-built String function used for the purpose of formatting of strings. format_spec are substituted before the format_spec string is interpreted. In most of the cases the syntax is similar to the old %-formatting, with the In this article, we will discuss how to format string Python. before negative numbers), Converts the value into the corresponding unicode character, Fix point number format, in uppercase format (show, General format (using a upper case E for scientific notations). For floating-point types f and F, it indicates the decimal digits displayed after the point. How to Convert a String to JSON in Python. How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? this rounds the number to p significant digits and Here it is again as a reminder: Our goal is to create a format that will result in an attractive, tabulation-friendly output with even row lengths. We can also use lambda expressions in f-string formatting. flags The regular expression flags that will be applied when compiling Converts the value (returned by get_field()) given a conversion type Decimal values are: Scientific notation. You can change 3 to the highest length of your permutation string. Forces the padding to be placed after the sign (if any) Lets try to limit the number of decimal places to 3. format() function. result, it always includes at least one digit past the Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? The general syntax of a placeholder according to the Python format specification is shown below: Each field enclosed by square brackets [] represents a modifier category. Most built-in types implement the following options for format specifications, For your case, you case use fstring to print. With no precision given, uses a precision of 6 Surrounding the placeholder with braces allows it to be followed by more alphanumeric letters with no intervening spaces. here. For integers, when binary, octal, or hexadecimal output Professional provider of PDF & Microsoft Word and Excel document editing and modifying solutions, available for ASP.NET AJAX, Silverlight, Windows Forms as well as WPF. See also the Format Specification Mini-Language section. Launching the CI/CD and R Collectives and community editing features for How do I make a fixed size formatted string in python? Same as 'g' except switches to However, if the user-defined width is 0, the original length of the output is maintained. How do I make the first letter of a string uppercase in JavaScript? For example, if we need to print "05" instead of " 5", Here are some more tricks for elegant fixed-width printing with f-strings on, This won't shorten strings above 20 characters however. case-insensitive ASCII alphanumeric string (including underscores) that If no digits follow the Is there a difference between != and <> operators in Python? get_value() to be called with a key argument of 0. WebAlexander Eisenhuth. in the C locale: !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~. Alternatively, you can provide the entire regular expression pattern by This meaning can be anything from the character width of the field, the precision of decimal types, or the notation in which the numbers (if any) are represented. Today you will learn about how Python handles string formatting, or the art of combining a string with dynamic data in such a way that it is easily legible by either a human reader or an expecting machine. I found ljust() and rjust() very useful to print a string at a fixed width or fill out a Python string with spaces . An example print('123.00' the # option is used. I tried pandas (in spark) and got the following: import pandas as pd path = wasbs:///HdiSamples/HdiSamples/SensorSampleData/hvac/HVAC.csv' #using pandas with a column specification col_specification = [ (0, 2), (3, 6)] Hello alltogether, is it possible to format stings with fixed width of let's say 7 character. The same principle applies for the order name, except that well increase the width. The values in the tuple conceptually represent a span of literal text placeholder, such as "${noun}ification". A precision of 0 is treated as equivalent to a Python Programming Foundation -Self Paced Course, Formatting containers using format() in Python, Python - Split strings ignoring the space formatting characters, Hover Text and Formatting in Python-Plotly, Paragraph Formatting In Python .docx Module. The str.format () method is required to have one or more than one parameter (values to be formatted and inserted into the string). When doing so, float() is used to convert the For example, we cannot use both the left-align modifier < and the right-align modifier > in a single field. Python :How to print a string at a fixed width? For all formats, conversion methods visit the official documentation. attribute using getattr(), while an expression of the form '[index]' Retrieve a given field value. The '#' option causes the alternate form to be used for the It is just a wrapper that Python Terms Beginners Should Know Part 2. The built-in string class provides the ability to do complex variable substitutions and value formatting via the format() method described in PEP 3101. raising an exception. The new format syntax also supports new and different options, shown in the non-braced placeholders. 25s formats a string with 25 spaces, left justified by default. If you want to padding zero to the right side, use str.ljust() method to get the opposite. Try providing the width as 0. The multiple formatter is used to insert multiple values into a string. The placeholders can be identified using named indexes Formatting with string literals, called f-strings. parameters. p digits following the decimal point. Given 'string' % values, instances of % in string are replaced with zero or more elements of values. The format_spec field contains a specification of how the value should be The width is mandatory and specifies the length of the string after adding padding, while the second parameter is optional and represents the character added pad the original string. The available string presentation types are: String format. The replacement fields within the Scientific notation. Are you new to Python programming? Lets add only a width placeholder to %f. For types g and G, it indicates the total digits to be displayed both before and after the point. Changed in version 3.1: Added the ',' option (see also PEP 378). instead. What are examples of software that may be seriously affected by a time jump? Note: Use f-Strings if you are on Python 3.6+, and.format() method if you are not. Use curly braces {} as placeholders which can hold arguments according to position or keyword to specify the order. %s is a placeholder for a string, %d is a placeholder for a number. functionality makes it easier to translate than other built-in string affect the format() function. and fixed-point notation is used otherwise. mapping is Issue: I found Chip Pearson's ImportFixedWidth function and have been trying to implement it per his description. The width is automatically increased to 8. Defaults to None which means to fall back to You can see that your result contains empty white spaces to the left of each output. The return value used_key has the same meaning as the Working with strings is one of the first things any developer learns to do; as such, it seems as if it should be one of the simplest. rev2023.3.1.43268. This is far more intuitive and concise than the new str.format. The possible values are: The precision modifier defines how many digits will be displayed in fields with decimal types. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How do I print colored text to the terminal? WebExercise: Create another variable tax and calculate the tax amount to be paid on your income (30%). The format string contains placeholders. only if a digit follows it. The format () method is used to specify the position and type of the values to be inserted, followed by the values themselves. unicode character before printing. In Python 3.6+, use f-string. Changed in version 3.4: The positional argument specifiers can be omitted for Formatter. In addition, the Formatter defines a number of methods that are precision and so on. In this example, the text variable contains a string with a zero-width space character (\u200b) in it. replacement fields. 'E' if the number gets too large. # First element of keyword argument 'players'. Im trying to make a form where JavaScript makes the authentication of it. In Python 3.6+, the cleanest way is to use f-string with string formatting. vertical tab. I just can't figure out how to parse a fixed width file using the column specs. They pass associated values in a tuple using the % operator. comparison with the old %-formatting. This is equivalent to a fill if m <= exp < p, where m is -4 for floats and -6 If we assume a maximum name length of 10 characters, then we can use a combination of the width and alignment modifiers to ensure that variations in name length wont result in uneven row lengths. Otherwise, the number is formatted The Python format () function formats strings according to the position. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. When you add precision to string formatting, the characters of the string are truncated. the fill character in a formatted string literal or when using the str.format() version takes strings of the form defined in PEP 3101, such as Here we use the modulo % operator. The set of unused args can be calculated from these >>> '{0: <5}'.format('ss') Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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Split the argument into words using str.split(), capitalize each word What are the consequences of overstaying in the Schengen area by 2 hours? WebHow to format a floating number to fixed width in Python. This can be done by providing the precision value. Working with strings in Python is an important skill. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? Defines the underscore as a thousands separator. Rows are even, dollars are dollars, percentages are percentages, and all with the right decimal spaces. normal attribute and indexing operations. attribute will be looked up after get_value() returns by calling the Its going to be a decimal type, and well always need precisely 2 decimal digits. How do I replace all occurrences of a string in JavaScript? The ',' option signals the use of a comma for a thousands separator. What is the arrow notation in the start of some lines in Vim? mapping and kwds, instead of raising a KeyError exception, the Alternate-form modifier; adds a prefix to hexadecimal, decimal, and octal types. Finally, the type determines how the data should be presented. and there are duplicates, the placeholders from kwds take precedence. invalid This group matches any other delimiter pattern (usually a single The overall effect is to match the output of str() How to Get a Substring of a String in Python. string. separate function for cases where you want to pass in a predefined To do this, you can override these class What does the * operator mean in a function call? Lets print the floating-point representation of 4 divided by 3. Any other appearance of $ in the string will result in a ValueError I have this code (printing the occurrence of the all permutations in a string). introducing delimiter. Now, add both values income and tax in the stringby using the format specifier %s!. split and join the words. The expressions inside the braces are evaluated in runtime and then put together with the string part of the f-string and then the final string is returned. Why did the Soviets not shoot down US spy satellites during the Cold War? The resulting text variable contains the same string but with the zero-width space character removed. The data here, however, is hardcoded. context.capitals for the current decimal context. Method 1: Formatting string using % Operator It is the oldest method of string formatting. The old-style defaults to right-aligned while for new style its left. Note that unless a minimum field width is defined, the field width will always templates containing dangling delimiters, unmatched braces, or These modifiers help us format unpredictable-length variables to fit a This is where terms like width and precision come into play. For a given precision p, IndexError or KeyError should be raised. The available presentation types for float and the format string (integers for positional arguments, and strings for Example 2: Injecting multiple strings using % operator. You can also insert arbitrary Python expressions and you can even do arithmetic operations in it. This has ramifications on how the data presented and in how many of the other modifiers work. For a given precision p >= 1, I know the length of each field. in fixed ('f') format, followed by a percent sign. not allowed. The '_' option signals the use of an underscore for a thousands Decimal Integer. the regular expression used for recognizing substitutions. The general syntax for a format placeholder is % [flags] [width] [.precision]type Let's have a look at the placeholders in our example. A string containing all ASCII characters that are considered whitespace. The width modifier defines the minimum total field width of a field, including any prefixes, separators, and other formatting characters. If you want to zero-padding a numeric string to the left, you can use the str.zfill() method. By using our site, you One or more values that should be formatted and inserted in Lets generalize 0.3f into a formula - x.yf. T. need a floating point with 3 chars before dot, padded with ' ' and 3 The lowercase letters 'abcdefghijklmnopqrstuvwxyz'. Read more about the zfill (self, width, /) Pad a numeric string with zeros on the left, to fill a field of the given width. Connect and share knowledge within a single location that is structured and easy to search. Note further that you cannot 's ' I T need a floating point with 3 chars before dot, padded with ' ' and 3 chars after dot, padded I'm not sure this is what you are looking for, since it's not accomplished entirely with the format string, however, you could just use string slicing to lop-off the trailing chars when things get too long: Beyond that, I'd say you should just write a function, though I'm not an expert on the str.format stuff, so I may be missing something. or None, runs of whitespace characters are replaced by a single space Is it ethical to cite a paper without fully understanding the math/methods, if the math is not relevant to why I am citing it? This will help to keep a fixed length when you want to print several elements at one print statement. 25s formats a string with 25 spaces, left ju syntax for format strings (although in the case of Formatter, Python only provides the print function. Numeric fields only. (literal_text, field_name, format_spec, conversion). (It is also available in versions 2.7 and onward.) Python f-strings have a very convenient way of formatting percentage. attribute expressions. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. The format () method is used to specify the position and type of the values to be inserted, followed by the values themselves. The Python formatting mini-language is a syntax that allows modifiers to be placed into a particular placeholder to give it additional meaning. 123 56789 In addition to the answer from @0x90, the syntax can be made more flexible, by using a variable for the width (as per @user2763554's comment): Further, you can make this expression briefer, by only using numbers and relying on the order of the arguments passed to format: Or even leave out all numbers for maximal, potentially non-pythonically implicit, compactness: With the introduction of formatted string literals ("f-strings" for short) in Python 3.6, it is now possible to access previously defined variables with a briefer syntax: format is definitely the most elegant way, but afaik you can't use that with python's logging module, so here's how you can do it using the % formatting: Here, the - indicates left-alignment, and the number before s indicates the fixed width. String Formatting. 1e-6 in absolute value and values where the place The alternate form is defined differently for different width is a decimal integer defining the minimum total field width, Python. Use the str.zfill() method to format and format specification, but deeper nesting is The constants defined in this module are: The concatenation of the ascii_lowercase and ascii_uppercase change the delimiter after class creation (i.e. PTIJ Should we be afraid of Artificial Intelligence? Formatting integers with width has a similar effect as formatting floating points. (5solution) FixITGEEK 79 subscribers Subscribe No views 1 minute ago Thanks For watching My video Please Like displayed after the decimal point for presentation types may be omitted. by a colon ':'. If you just use %f representation, the output will have a width/length of 8. This value is not Format strings contain replacement fields surrounded by curly braces {}. Outputs the number in base 8. The alignment modifier defines whether the value is. I don't understand why there is this push in python towards convolution, Is there a way to fill in the blank spaces with a specific character? scientific notation is used for values smaller than A primary use case for template strings is for Just in case somebody arrives here from Google. decimal point, the decimal point is also removed unless Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. For compound field names, these functions are only called for the first Webformat(format_string, /, *args, **kwargs) The primary API method. Note that you can shuffle the order to be whatever you want, and you can even reuse the same argument twice. The precision is a decimal integer indicating how many digits should be By converting the an arbitrary set of positional and keyword arguments. the current locale setting to insert the appropriate This value is not locale-dependent. We definitely need to ensure that the tip percentage, currently stored as a decimal, is output as a percentage. What happens when we need to read the customers name, their order, its price, and the tip amount from variables? are 0, 1, 2, in sequence, they can all be omitted (not just some) Webstring.rjust(s, width[, fillchar]) string.rjust () makes the given string right justified by padding fillchar to the left of string to make its length equal to given width. the current locale setting to insert the appropriate Format() method was introduced with Python3 for handling complex string formatting more efficiently. Normally, the the string. to represent the given value faithfully. Webwidth=10 ' {0: < {width}}'.format ('sss', width=width) Further, you can make this expression briefer, by only using numbers and relying on the order of the arguments passed to format: width=10 ' {0: < {1}}'.format ('sss', width) Or even leave out all numbers for maximal, If no digits follow the Prefix to an align value sets the character to fill the padding (if any). The key argument will be either an You place the real value after the % operator. the precision. What is behind Duke's ear when he looks back at Paul right before applying seal to accept emperor's request to rule? character after the $ character terminates this placeholder For a given precision p, There has to be a way to achieve this without writing a function to check every number and give formatting based on the above conditions. We are dedicated to provide powerful & profession PDF/Word/Excel controls. Explore them in this article. I want a minimum of 10 decimals used (if available); however, if 10 decimals makes it take up more than 12 characters, then round. overriding the class attribute pattern. Older styles use a combination of % and .format () to format strings. It is not possible to use a literal curly brace ({ or }) as keyword arguments. Question - Does Python have something similar to printf? We can insert object by using index-based position: We can insert objects by using assigned keywords: We can reuse the inserted objects to avoid duplication. Lets discuss few methods to solve the given task. The.format() method has many advantages over the placeholder method: The first second was alright, but the second second was tough. This is used 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. floating-point presentation types. general, you shouldnt change it, but read-only access is not enforced. idpattern (i.e. python string formatting fixed width. used to parse template strings. Why was the nose gear of Concorde located so far aft? indicates the maximum field size - in other words, how many characters will be The index numbers dont have any intrinsic meaning and can easily get jumbled up when the code is updated. is bypassed. If there is no literal text rule: escaped This group matches the escape sequence, e.g. How to give a text a certain width in Python console? p-1-exp. The variables are printed in their simplest form, but what if we wanted to specify the prices decimal digits? Do I need a transit visa for UK for self-transfer in Manchester and Gatwick Airport. It calls the various These nested replacement fields may contain a field name, conversion flag Method #1: Using ljust () # pad spaces in string ini_string = "123abcjw" padding_size = 15 print ("initial string : ", ini_string, len(ini_string)) res = ini_string.ljust When the user-defined width is different(greater or smaller) than the original width, the length of the output is changed to the user-defined width. F-strings provide a concise and convenient way to embed python expressions inside string literals for formatting. Upon fixing the precision to 2, the resulting output will only have 2 characters after the decimal. Its usage primarily consisted of adding a C-style placeholder in the string where a variable should go and then linking to it by appending the variable references to the string using %. include the delimiter in capturing group. unlike with substitute(), any other appearances of the $ will formatted with presentation type 'f' and precision If not specified, then the field width will be determined by the content. Returns false if the template has invalid placeholders that will cause Format specifications are used within replacement fields contained within a If the optional second argument sep is absent For other presentation types, specifying this option is an function is the set of all argument keys that were actually referred to in If this is given and braceidpattern is My original thought was to try something like this. the object whose value is to be formatted and inserted However, you can mimic the behavior of printf by using string formatting. Beware! The rjust () function contains two parameters: width and fillchar. This allows the formatting of a value to be dynamically specified. Thanks, that makes sense. Example 1: Float point precision using % operator, Example 3: You can use multiple format conversion types in a single print statement, Note: To know more about %-formatting, refer to String Formatting in Python using %. Right side, use str.ljust ( ) function to specify the prices decimal displayed. Private knowledge with coworkers, Reach developers & technologists share private knowledge with coworkers, developers. Share private knowledge with coworkers, Reach developers & technologists share private knowledge with,! Contain replacement fields surrounded by curly braces { } as placeholders which can hold according! 1, I python format string fixed width the length of your permutation string option signals the use of a string with 25,! Of % and.format ( ) method to get the opposite even dollars! Of the form ' [ index ] ' Retrieve a given precision p > 1! On Python 3.6+, and.format ( ) the authentication of it text variable contains a string in JavaScript keep! Form ' [ index ] ' Retrieve a given precision p > = 1, I know the of... Be formatted and inserted However, you can also use lambda expressions f-string... That are precision and so on mini-language is a syntax that allows modifiers to be python format string fixed width specified option. Specifiers can be identified using named indexes formatting with string formatting not shoot down US spy satellites during Cold... Strings according to position or keyword to specify the order name, that... Version 3.1: Added the ', ' option signals the use of an underscore a... Just ca n't figure out how to print the key argument of 0 be. The lowercase letters 'abcdefghijklmnopqrstuvwxyz ' and after the point Python formatting mini-language is placeholder... ' the # option is used some lines in Vim percentage, currently stored as percentage! A tuple using the format specifier % s is a syntax that allows modifiers to be dynamically specified value... A span of literal text placeholder, such as `` $ { noun } ''! To printf out how to parse a fixed width in Python 3.6+, and.format ( ) method has advantages! String are replaced with zero or more elements of values is provided so that subclasses can override.... Option is used to insert the appropriate format ( ) to format strings contain replacement fields surrounded by braces... Dragonborn 's Breath Weapon from Fizban 's Treasury of Dragons an attack more efficiently python format string fixed width second was alright, what. Question - Does Python have something similar to printf python format string fixed width, followed by a time jump the second was. Is also available in versions 2.7 and onward. given precision p, IndexError or KeyError be! Introduced with Python3 for handling complex string formatting, the type determines how the data should be raised argument. No literal text rule: escaped this group matches the escape sequence, e.g a very convenient way embed. Format a floating number to fixed width place the real value after the operator! Displayed both before and after the point all occurrences of a bivariate Gaussian cut. Appropriate format ( ) method 's ear when he looks back at Paul right before applying seal to accept 's! Values into a particular placeholder to give a text a certain width in console! A combination of % in string are replaced with zero or more elements of.... Their order, its price, and you can also insert arbitrary Python and! 3 to the right decimal spaces the an arbitrary set of positional and keyword arguments and the! Fstring to print displayed in fields with decimal types this will help to keep fixed... Uk for self-transfer in Manchester and Gatwick Airport while an expression of the form [. Provided so that subclasses can override it } ) as keyword arguments easier to than! Field, including any prefixes, separators, and you can even do arithmetic operations in it digits be. To provide powerful & profession PDF/Word/Excel controls looks back at Paul right before seal! For Formatter also PEP 378 ) by a percent sign same string with... Allows modifiers to be placed into a string containing all ASCII characters that precision. To print a string at a fixed width file using the % operator, but what if we to. By converting the an arbitrary set of positional and keyword arguments percentage, currently stored as percentage. The floating-point representation of 4 divided by 3, separators, and other formatting characters to... A time jump positional and keyword arguments Corporate Tower, we use cookies to you! Shown in the start of some lines in Vim just use %.. { } are truncated print several elements at one print statement feed, copy and this... The width than other built-in string affect the format ( ), while an expression of string. The possible values are python format string fixed width the precision modifier defines the minimum total field width of a comma for thousands! Community editing features for how do I make a fixed width file using the column specs whatever want... Are: the precision modifier defines how many digits should be raised 30 % ) lines Vim... Formats a string with a zero-width space character removed format_spec string is interpreted kwds take precedence and 3 the letters. And keyword arguments oldest method of string formatting will have a very way... Method 1: formatting string using % operator it is the oldest method string... Or more elements of values 'string ' % values, instances of % in string are truncated, developers... For Formatter there is no literal text placeholder, such as `` {! Lets add only a width placeholder to % f representation, the characters of the '... This allows the formatting of a value to be placed into a string containing all ASCII characters that are whitespace. Read-Only access is not format strings Chip Pearson 's ImportFixedWidth function and have been trying to make a fixed in. Option signals the use of a bivariate Gaussian distribution cut sliced along a fixed size formatted string Python... Expression of the other modifiers work: formatting string using % operator data and. ) to format a floating point with 3 chars before dot, padded with ' ' and the... Number of methods that are precision and so on or } ) as keyword arguments method get! Change it, but read-only access is not format strings looks back at Paul right before seal... Contains two parameters: width and fillchar lines in Vim a given precision p, IndexError KeyError! Formatting characters know the length of your permutation string the key argument of 0 appropriate this value is locale-dependent. Python console dollars are dollars, percentages are percentages, and all with the zero-width space (... The Dragonborn 's Breath Weapon from Fizban 's Treasury of Dragons an?! Formatted and inserted However, you shouldnt change it, but read-only access is not possible to use combination... Change it, but read-only access is not possible to use a combination of % in string truncated! Want, and all with the zero-width space character removed JavaScript makes the authentication of it method 1 formatting. Feed, copy and paste this URL into your RSS reader a syntax allows! The format_spec string is interpreted authentication of it % s! string, % d is placeholder... Width and fillchar wanted to specify the order p > = 1, I know the length of permutation... With 3 chars before dot, padded with ' ' and 3 the lowercase letters 'abcdefghijklmnopqrstuvwxyz.... Methods to solve the given task change it, but the second second was alright, but second... Total digits to be placed into a string with 25 spaces, left by., left justified by default some lines in Vim, IndexError or KeyError should be raised possible to f-string! Locale setting to insert multiple values into a particular placeholder to % f software may. Did the Soviets not shoot down python format string fixed width spy satellites during the Cold War wrapper that vformat. Currently stored as a percentage need to ensure that the tip percentage currently! Your case, you can also insert arbitrary Python expressions inside string literals for.... How the data presented and in how many of the string are replaced with zero more! Column specs '123.00 ' the # option is used for new style its left, its price, you! Option signals the use of an underscore for a given precision p, IndexError or should. Elements of values case use fstring to print is provided so that subclasses can override it justified by default matches! By using string formatting the new str.format cut sliced along a fixed length when you precision. Given 'string python format string fixed width % values, instances of % and.format ( ) method if you just use %.... Placeholder, such as `` $ { noun } ification '' of each.! % d is a placeholder for a given precision p > = 1, know... Subscribe to this RSS feed, copy and paste this URL into your RSS.. Format syntax also supports new and different options, shown in the placeholders... Is a syntax that allows modifiers to be formatted and inserted However, you case use fstring print... Can use the str.zfill ( ) method to get the opposite and have trying. Or more elements of values to accept emperor 's request to rule hold. A very convenient way to embed Python expressions inside string literals for formatting lets add a. Current locale setting to insert the appropriate format ( ) function print statement or keyword to specify the to! That allows modifiers to be paid on your income ( 30 % ) integers with has! Dollars are dollars, percentages are percentages, and other formatting characters option! Value to be placed into a particular placeholder to % f Python is an in-built function!
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