W3Schools
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Python String format() Method
Python Overview Python Built-in ... Certificate Python Training ... The format() method formats the specified value(s) and insert them inside the string's placeholder....
Python
docs.python.org › 3 › library › string.html
Common string operations — Python 3.14.3 documentation
The arguments to this function is the set of all argument keys that were actually referred to in the format string (integers for positional arguments, and strings for named arguments), and a reference to the args and kwargs that was passed to vformat. The set of unused args can be calculated from these parameters. check_unused_args() is assumed to raise an exception if the check fails. ... format_field() simply calls the global format() built-in. The method is provided so that subclasses can override it.
Videos
Python f-Strings - Advanced String Formatting tutorial for beginners ...
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Python: String Formatting | str.format() | f strings and more...
Python documentation
docs.python.org › 3 › tutorial › inputoutput.html
7. Input and Output — Python 3.14.3 documentation
The brackets and characters within them (called format fields) are replaced with the objects passed into the str.format() method.
GeeksforGeeks
geeksforgeeks.org › python › python-string-format-method
Python String format() Method - GeeksforGeeks
July 11, 2025 - format() method in Python is a tool used to create formatted strings. By embedding variables or values into placeholders within a template string, we can construct dynamic, well-organized output.
Vultr Docs
docs.vultr.com › python › standard-library › str › format
Python str format() - String Formatting | Vultr Docs
December 11, 2024 - The format() method in Python is a powerful tool for string formatting, allowing developers to create formatted strings dynamically. It makes code cleaner and more readable by providing a way to interpolate data into strings.
Real Python
realpython.com › python-string-formatting
Python String Formatting: Available Tools and Their Features – Real Python
December 2, 2024 - Python’s string formatting mini-language offers features like alignment, type conversion, and numeric formatting. While f-strings are more readable and efficient compared to .format() and the % operator, the .format() method supports lazy evaluation.
Programiz
programiz.com › python-programming › methods › string › format
Python String format()
The format() method returns the formatted string. The format() reads the type of arguments passed to it and formats it according to the format codes defined in the string. ... Here, Argument 0 is a string "Adam" and Argument 1 is a floating number 230.2346. Note: Argument list starts from 0 ...
DigitalOcean
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How To Use String Formatters in Python 3 | DigitalOcean
August 20, 2021 - Formatters work by putting in one or more replacement fields or placeholders — defined by a pair of curly braces {} — into a string and calling the str.format() method. You’ll pass into the method the value you want to concatenate with the string. This value will be passed through in the same place that your placeholder is positioned when you run the program. ... Info: To follow along with the example code in this tutorial, open a Python interactive shell on your local system by running the python3 command.
GeeksforGeeks
geeksforgeeks.org › python › string-formatting-in-python
String Formatting in Python - GeeksforGeeks
In the given code, the formatting ... %(variable, variable) print (string) ... Format() method was introduced with Python3 for handling complex string formatting more efficiently....
Published January 14, 2026
PyFormat
pyformat.info
PyFormat: Using % and .format() for great good!
With new style formatting it is possible (and in Python 2.6 even mandatory) to give placeholders an explicit positional index. This allows for re-arranging the order of display without changing the arguments. This operation is not available with old-style formatting. ... The new-style simple formatter calls by default the __format__() method of an object for its representation. If you just want to render the output of str(...) or repr(...) you can use the !s or !r conversion flags.
LabEx
labex.io › home › cheatsheet › string formatting
Python String Formatting - Python Cheatsheet
Python 3 introduced a new way to do string formatting that was later back-ported to Python 2.7. This makes the syntax for string formatting more regular. # str.format() method: modern string formatting (Python 2.7+) name = 'John' age = 20 "Hello I'm {}, my age is {}".format(name, age) # {} = placeholder
Note.nkmk.me
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Format Strings and Numbers in Python: format() | note.nkmk.me
May 18, 2023 - In Python, you can convert numbers and strings to various formats with the built-in function format() or the string method str.format(). The built-in function: format() The string method: str.format() ...
W3Schools
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Python String Formatting
F-String was introduced in Python 3.6, and is now the preferred way of formatting strings. Before Python 3.6 we had to use the format() method.
Python
peps.python.org › pep-3101
PEP 3101 – Advanced String Formatting | peps.python.org
The syntax for format specifiers is open-ended, since a class can override the standard format specifiers. In such cases, the str.format() method merely passes all of the characters between the first colon and the matching brace to the relevant underlying formatting method.
TechBeamers
techbeamers.com › python-string-format
Python String Format() - TechBeamers
November 30, 2025 - To format a string using the str.format() method, you pass it a format string and a set of keyword arguments.
YouTube
youtube.com › real python
The Python String .format() Method - YouTube
In this lesson you will learn the basics of how the string .format() method works. String formatting can interpolate Python values into pre-built strings. Th...
Published November 26, 2020 Views 23K
Real Python
realpython.com › python-formatted-output
A Guide to Modern Python String Formatting Tools – Real Python
February 1, 2025 - You create an f-string in Python by prepending a string literal with an f or F and using curly braces to include variables or expressions. You can use variables in Python’s .format() method by placing them inside curly braces and passing them as arguments.
Tutorialspoint
tutorialspoint.com › python › python_string_formatting.htm
Python - String Formatting
To insert a string into a format ... a built-in method of str class. The format() method works by defining placeholders within a string using curly braces "{}"....
Top answer 1 of 6
69
You can use the .attribute_name notation inside the format fields themselves:
print 'My object has strings a={0.a}, b={0.b}, c={0.c}'.format(obj)
Below is a demonstration:
>>> class Test(object):
... def __init__(self, a, b, c):
... self.a = a
... self.b = b
... self.c = c
...
>>> obj = Test(1, 2, 3)
>>> 'My object has strings a={0.a}, b={0.b}, c={0.c}'.format(obj)
'My object has strings a=1, b=2, c=3'
>>>
Note however that you do need to number the format fields when doing this. Also, as you can see, the str.format function has its format fields denoted by curly braces {...}, not the % sign.
For more information, here is a reference on the Format String Syntax in Python.
2 of 6
21
I think it's preferable to use vars() to access an object's attributes as a dict rather than usng __dict__.
So you could do this:
"My object has strings a={a}, b={b}, c={c}".format(**vars(obj))
For more background on why vars() is preferable to __dict__, see the answer to the question Use dict or vars()?.