Floating point values have the f suffix. We can also specify the precision: the number of decimal places. The precisionisa value that goes right after the dot character. format_floats.py#!/usr/bin/pythonval= 12.3print(f'{val:.2f}')print(f'{val:.5f}') The example prints a formatted ...
This Python f-string tutorial demonstrates how to format strings efficiently using f-strings, the preferred approach for string interpolation in modern Python. With f-strings, developers can create dynamic and readable output in a concise and intuitive way. Python f-stringis a powerful and flexible...
## 4、字符串中关键字split,rsplit,执行后类型由字符串类型转换到列表类型。## split会按照从左到右的顺序对字符串进行切分,可以指定切割次数#str4 = 'C:/a/b/c/d.txt'#f_g_4 = str4.split('/',1)#print(type(str4),type(f_g_4),f_g_4) # <class 'str'> <class 'list'> ['C:', ...
1、浮点数字节 float类型占用4字节内存,表示小数字,数据范围为-2^128 ~ 2^128(-3.40E+38 ~ +3.40E+38 );float数据类型用于存储单精度浮点或双精度浮点。 2、浮点数说明 float数据类型用于存储单精度浮点或双精度浮点。浮点采用IEE(电气和电子工程师协会)格式。浮点类型的单精度值包括四个部分:数字、尾数、指...
The f letter tells the operator to convert to a floating-point number. The .2 part defines the precision to use when converting the input. In the second example, you use %5s to align the age value five positions to the right.Note: Formatting with the modulo operator is inspired by ...
Python 数值类型包括整型(integer),浮点型(floating point number)和复数(complex number),并且,布尔型(boolean)是整型的子类
python格式化字符串的三种方法:%,format,f-string 推荐使用f-string 进行字符格式化(可参考的教程) 异常处理 #python全部的异常类型 +-- BaseException (new; broader inheritance for subclasses) +-- Exception +-- GeneratorExit (defined in PEP 342 [1]) +-- StandardError +-- ArithmeticError +-- Divide...
1. Python数据类型(6个) 1.1 数值型(number) 1.2 字符型(string) 字符串常用方法 转义字符 可迭代性 f-string 1.3 列表(list) 1.4 字典(dictionary) 1.5 集合(set) 1.6 元组(tuple) 1.7 内存视图Memoryview 2. 动态引用、强类型 3. 二元运算符和比较运算 4. 标量类型 5. 三元表达式 ...
>>>n=3>>>print(f"{n:4d}")3 If you'd like to space-pad floating point numbers, check out>Nin the section on strings below. Percentages The.N%format specifier (whereNis a whole number) formats a number as a percentage. Specifically.N%will multiply a number by100, format it to have...
3.4 raise "Exception string" 把字符串当成异常抛出看上去是一个非常简洁的办法,但其实是一个非常不好的习惯。 if is_work_done(): pass else: raise "Work is not done!" # not cool 1. 2. 3. 4. 上面的语句如果抛出异常,那么会是这样的: ...