f-stringf-string examples:format specifiersRaw f-string preface 到目前位置,我认为python的字符串插值语法在诸多现代编程语言中是最为方便的,允许你在字符串中直接使用{}来指明一个表达式,而统一地将指示该字符串是一个插值字符串...
In this quick example, you use the % operator to interpolate the value of your name variable into a string literal. The interpolation operator takes two operands:A string literal containing one or more conversion specifiers The object or objects that you’re interpolating into the string literal...
The f-strings have thefprefix and use{}brackets to evaluate values. Format specifiers for types, padding, or aligning are specified after the colon character; for instance:f'{price:.3}', wherepriceis a variable name. Python string formatting The following example summarizes string formatting opt...
F-strings provide a modern and intuitive way to format strings in Python by using a simple prefix and expression syntax. Let's start with the fundamentals of creating f-strings. Creating an f-String To create an f-string, simply add the letter 'f' or 'F' before your string literal. Bo...
Python f-string format datetime The following example formats datetime. format_datetime.py#!/usr/bin/pythonimportdatetime now=datetime.datetime.now()print(f'{now:%Y-%m-%d %H:%M}') The example displays a formatted current datetime. The datetime format specifiers follow the : character. ...
numbers = [7,6,1,4,1,8,0,6] results = [valuefornuminnumbersif(value := slow(num)) >0] f-string:在字符串在插入变量。我们可以使用format specifiers来进行格式控制。 这种格式符的用法又称为Format Mini-Language。 下面是所有format specifiers:...
>>>n=.48>>>print(f"{n*100:.2f}")48.00>>>print(f"{n:.2%}")48.00% Formatting strings The format specifiers for strings are all about alignment. I use these pretty rarely (mostly when lining-up data in a command-line interface). ...
f'He said his name is{name!r}.' >>>"He said his name is 'Fred'." 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. format specifiers https://www.python.org/dev/peps/pep-0498/#id30 Raw f-string https://www.python.org/dev/peps/pep-0498/#id43...
Here are a few examples of how to use some of the above specifiers in your strings: Python >>>"%d"%123.123# As an integer'123'>>>"%o"%42# As an octal'52'>>>"%x"%42# As a hex'2a'>>>"%e"%1234567890# In scientific notation'1.234568e+09'>>>"%f"%42# As a floating-point ...
PEP 701 said: Similarly, this PEP leaves up to the implementation the level of expression nesting in format specifiers but specifies a lower bound of 2 levels of nesting. This means that the following should always be valid: f"{'':*^{1:{...