>>> ip_address = "127.0.0.1"# pylint complains if we use the methods below>>> "http://%s:8000/" % ip_address'http://127.0.0.1:8000/'>>> "http://{}:8000/".format(ip_address)'http://127.0.0.1:8000/'# Replace it with a f-string>>> f"http://{ip_address}:8000...
不过 f-string 并不能完全替代 str.format。本文也将列举出这两者并不通用的情况。 2、基本的字符串格式化 如上文所述,使用f-string格式化字符串十分简单。唯一的要求就是给它一个有效的表达式。f-string 也可以用大写F开头或者与 r 原始字符串结合使用。但是你不能将其与 b”” 或者 ”u” 混用。 book =...
F-strings also support format specifiers that control numerical precision, alignment, and padding. Format specifiers are added after a colon (:) inside the curly brackets. For instance,f'{price:.3f}'ensures that the floating-point number stored inpriceis rounded to three decimal places: price =...
The f-strings have the f prefixanduse {} brackets to evaluate values. Format specifiersfortypes, padding,oraligning are specified after the colon character;forinstance: f'{price:.3}', where priceisa variable name. Python string formatting The following example summarizes string formatting optionsin...
要使用格式化字符串文字,请在左引号或三引号之前以 f 或 F 开始字符串。 字符串的 format() 方法可帮助用户创建更精美的输出。 用户可以通过使用字符串切片和连接操作来完成所有字符串处理,以创建用户想要的任何布局。 string 类型有一些方法可以执行有用的操作,将字符串填充到给定的列宽。
F-strings are string literals prefixed with 'f' or 'F' that contain expressions inside curly braces {}. These expressions are evaluated at runtime and then formatted using the __format__ protocol. Unlike traditional string formatting methods, f-strings provide a more straightforward and readable...
Here, {1:9.3f} places 230.2346 in its place and performs the operation 9.3f. f specifies the format is dealing with a float number. If not correctly specified, it will give out an error. The part before the "." (9) specifies the minimum width/padding the number (230.2346) can take....
print("Binary: {0:b} => {0:#b}".format(3))print("Large Number: {0:} => {0:,}".format(1.25e6))print("Padding: {0:16} => {0:016}".format(3))# Binary: 11 => 0b11# Large Number: 1250000.0 => 1,250,000.0# Padding: 3 => 0000000000000003 ...
Combining numeric format specifiers Multiple format specifiers can often be combined. For example if you wanted a number represented as hexadecimal with padding to make it 2-digits long, you could combine02dwithxto make02x: >>>bits=13>>>print(f"{bits:02x}")0d ...
f-string 是python新引入的一种字符串格式化的简便方法，它在字符串前加上f前缀。在 f-string 中，...