As maybe a alternative more portable [1] and efficient [2], actually you can just use str.ljust.
In [2]: '190'.ljust(8, '0')
Out[2]: '19000000'
In [3]: str.ljust?
Docstring:
S.ljust(width[, fillchar]) -> str
Return S left-justified in a Unicode string of length width. Padding is
done using the specified fill character (default is a space).
Type: method_descriptor
[1] format is not present on old python versions. format specifier was added since Python 3.0 (see PEP 3101) and Python 2.6.
[2] reverse twice is an expensive operation.
Answer from Manoel Vilela on Stack OverflowW3Schools
w3schools.com › python › ref_string_zfill.asp
Python String zfill() Method
a = "hello" b = "welcome to the jungle" c = "10.000" print(a.zfill(10)) print(b.zfill(10)) print(c.zfill(10)) Try it Yourself » ... Coding fundamentals as bite-sized lessons and challenges. ... If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail: sales@w3schools.com · If you want to report an error, or if you want to make a suggestion, send us an e-mail: help@w3schools.com · HTML Tutorial CSS Tutorial JavaScript Tutorial How To Tutorial SQL Tutorial Python Tutorial W3.CSS Tutorial Bootstrap Tutorial PHP Tutorial Java Tutorial C++ Tutorial jQuery Tutorial
Top answer 1 of 4
62
As maybe a alternative more portable [1] and efficient [2], actually you can just use str.ljust.
In [2]: '190'.ljust(8, '0')
Out[2]: '19000000'
In [3]: str.ljust?
Docstring:
S.ljust(width[, fillchar]) -> str
Return S left-justified in a Unicode string of length width. Padding is
done using the specified fill character (default is a space).
Type: method_descriptor
[1] format is not present on old python versions. format specifier was added since Python 3.0 (see PEP 3101) and Python 2.6.
[2] reverse twice is an expensive operation.
2 of 4
56
See Format Specification Mini-Language:
In [1]: '{:<08d}'.format(190)
Out[1]: '19000000'
In [2]: '{:>08d}'.format(190)
Out[2]: '00000190'
This also works with the Formatted String Literals, or f-strings for short (New in version 3.6):
In [1]: f'{190:<08d}'
Out[1]: '19000000'
In [2]: f'{190:>08d}'
Out[2]: '00000190'
Programiz
programiz.com › python-programming › methods › string › zfill
Python String zfill()
In this case, zfill() returns a copy of the string with five '0' digits filled to the left.
Does zfill change the original string?
No. Strings are immutable, so zfill returns a new padded string.
pythonpool.com
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Python zfill(): Zero-Pad Strings, Numbers, and Signs
Should I use zfill or an f-string?
Use zfill for an existing string and sign-aware text padding; use an f-string when the source is numeric and the complete output format is known.
pythonpool.com
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Python zfill(): Zero-Pad Strings, Numbers, and Signs
How do I add leading zeros in Python?
Convert the value to a string and call value.zfill(width), or use a numeric format such as f'{number:05d}' when formatting a number.
pythonpool.com
pythonpool.com › home › tutorials › python zfill(): zero-pad strings, numbers, and signs
Python zfill(): Zero-Pad Strings, Numbers, and Signs
Tutorialspoint
tutorialspoint.com › python › string_zfill.htm
Python String zfill() Method
The Python String zfill() method is used to fill the string with zeroes on its left until it reaches a certain width; else called Padding. If the prefix of this string is a sign character (+ or -), the zeroes are added after the sign character
GeeksforGeeks
geeksforgeeks.org › python-string-zfill
Python String zfill() - GeeksforGeeks
January 2, 2025 - zfill() method in Python is used to pad a string with zeros (0) on the left until it reaches a specified width.
Oraask
oraask.com › home › wiki - article
Python String zfill() Method : Clear And Concise - Oraask
March 4, 2022 - We Can fill zero at the left-hand side of a string value to match a specific length using python’s zfill method.
Stack Overflow
stackoverflow.com › questions › 67088927 › python-zfill-function-adds-0-at-the-end
pandas - Python zfill function adds .0 at the end - Stack Overflow
No, I do not want the .0 at the end. And for example, in line 151 the zfill() does not do its job ... It does :) You have floating point numbers that you are converting to strings. Copy and paste one of your numbers into the python prompt and you'll see what I mean.
Python Pool
pythonpool.com › home › tutorials › python zfill(): zero-pad strings, numbers, and signs
Python zfill(): Zero-Pad Strings, Numbers, and Signs
July 13, 2026 - Quick answer: zfill(width) returns a new string padded with zeros on the left. If the string begins with + or -, Python places the zeros after the sign.
Python Reference
python-reference.readthedocs.io › en › latest › docs › str › zfill.html
zfill — Python Reference (The Right Way) 0.1 documentation
Returns the numeric string left filled with zeros in a string of specified length · A sign prefix is handled correctly. The original string is returned if width is less than or equal to len(str)
datagy
datagy.io › home › python posts › python strings › python zfill & rjust: pad a string in python
Python zfill & rjust: Pad a String in Python • datagy
December 16, 2022 - The Python zfill method is a string method that returns a copy of the string left filled with the '0' character to make a character the length of a given width. The method takes a single parameter, width.
DataScience Made Simple
datasciencemadesimple.com › home › zfill() function in python
zfill() Function in Python - DataScience Made Simple
September 22, 2020 - zfill() Function in Python pads or adds zeros to left of the string to the required length. Syntax of zfill() Function in Python.Example of zfill() Function
Toppr
toppr.com › guides › python-guide › references › methods-and-functions › methods › string › zfill › python-string-zfill
Python zfill() function | Why do we use Python String zfill() function? |
September 27, 2021 - The Python zfill() function is a string method that returns a copy of the string by padding 0s to the left of the input string. Python zfill() is a built-in string method that pads the‘ 0’ character to the left of the input string and returns it.
Codecademy
codecademy.com › docs › python › strings › .zfill()
Python | Strings | .zfill() | Codecademy
November 19, 2023 - The .zfill() method pads a string with zeros on the left to maintain a specific length.
Initial Commit
initialcommit.com › blog › python-zfill-method
Python zfill Method
November 1, 2021 - We discuss how it interacts with different inputs and also suggest some alternatives depending on the situation. zfill() is a built-in string method in Python that is used for padding zeros to the left side of the string.
Note.nkmk.me
note.nkmk.me › home › python
Pad Strings and Numbers with Zeros in Python (Zero-padding) | note.nkmk.me
May 18, 2023 - If a leading sign prefix (-, +) exists, the string is filled with zeros after the sign. s = '-1234' print(s.zfill(8)) # -0001234 s = '+1234' print(s.zfill(8)) # +0001234
AskPython
askpython.com › python › string › python-string-zfill
Python string zfill() - AskPython
August 6, 2022 - The Python string zfill() method is used to pad a string with zeros on the left until a specific width is reached. This is the most "Pythonic" way to add
Javatpoint
javatpoint.com › python-string-zfill-method
Python String | zfill() method with Examples - Javatpoint
We are excited to announce that we are moving from JavaTpoint.com to TpointTech.com on 10th Feb 2025. Stay tuned for an enhanced experience with the same great content and even more features. Thank you for your continued support · Python zfill() method fills the string at left with 0 digit ...
Scaler
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zfill() in Python | Python String zfill() Method - Scaler Topics
March 15, 2022 - Where string represents a string ... method has been applied. ... zfill in Python returns a copy of the string with '0' characters added to the left side of the string to match with the width defined in the zfill() method....
iO Flood
ioflood.com › blog › python-zfill
Python's 'zfill()' Method | Guide To Padding Numeric Strings
February 14, 2024 - We use the zfill method with the argument 3, and it returns ‘007’, which is exactly what we want. This is just a quick introduction to Python’s zfill method. Keep reading for a more in-depth look at how to use it, including advanced scenarios and alternative approaches.
Pandas
pandas.pydata.org › docs › reference › api › pandas.Series.str.zfill.html
pandas.Series.str.zfill — pandas 3.0.5 documentation - PyData |
Strings in the Series/Index with length greater or equal to width are unchanged.