:.2%即为设置保留 2 位小数并在字符串末尾添加一个百分号,且会自动根据保留小数位进行四舍五入。 f-string调试模式{variable = } 你仔细观察下上面的例子,是不是发现语法书写变化了,这种写法就是f-string调试模式。 f-string 的调试功能是另一种书写语法,即使用{variable = }代替variable = {},如下面代码所示
Python输出格式化 格式化字符串语法 1.format 1.1 Format String Syntax 格式字符串语法 str.format() 方法和 Formatter 类共享相同的格式字符串语法(尽管在 Formatter 的情况下,子类可以定义自己的格式字符串语法)。 语法与格式化字符
(1) s: string, 字符串; (2) d: decimal integer, 十进制数; (3) i: integer, 用法同%d; (4) u: unsigned integer, 无符号十进制数; (5) f: float, 浮点数(默认保留小数点后6位); (6) F: Float, 浮点数(默认保留小数点后6位); (7) e: exponent, 将数字表示为科学计数法(小写e, 默认...
Python f-stringis a powerful and flexible string formatting method introduced in Python 3.6. Unlike older formatting techniques such as%-based formatting andstr.format(), f-strings are faster, more readable, and less prone to errors. They simplify string manipulation while maintaining excellent perfo...
print(s1) # TypeError: not all arguments converted during string formatting 1. 2. 3. 4. 5. 6. 7. 8. 7.2 format() %虽然强大,但用起来难免有些麻烦,代码也不是特别美观,因此,在python 2.5 之后,提供了更加优雅的str.format()方法。
Python's f-strings provide a readable way to interpolate and format strings. They're readable, concise, and less prone to error than traditional string interpolation and formatting tools, such as the .format() method and the modulo operator (%). F-string
Python 3添加了高级字符串格式化(advanced string formatting)机制,它的表达能力比老式C风格的格式字符串要强,且不再使用%操作符。我们针对需要调整格式的这个Python值,调用内置的format函数,并把这个值所应具备的格式也传给该函数,即可实现格式化。下面这段代码,演示了这种新的格式化方式。在传给format函数的格式里面,...
Notice how we can perform calculations directly within the string formatting: # Basic arithmetic operations x = 10 y = 5 print(f"Addition: {x + y}") print(f"Multiplication: {x * y}") print(f"Division with 2 decimal places: {x / y:.2f}") Powered By Output Addition: 15 ...
Python f-stringisthe newest Python syntax to do string formatting. Itisavailable since Python 3.6. Python f-strings provide a faster, more readable, more concise,andless error prone way of formatting stringsinPython. The f-strings have the f prefixanduse {} brackets to evaluate values. ...
Formatting numbers It'sverycommon to see format specifications used with numbers in Python. Below are the most useful string format specifications for numbers. You cantest some of these out from your browser here. N digits after the decimal point (fixed-point notation) ...