>>> 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...
下面是一个完整的示例,将字符串转换为两位小数数字: defconvert_to_two_decimal_places(num_str):num_float=float(num_str)formatted_num="{:.2f}".format(num_float)returnfloat(formatted_num)num_str="3.14159"result=convert_to_two_decimal_places(num_str)print(result)# 输出:3.14 1. 2. 3. 4. 5...
name = "Alice" age = 30 formatted_string = "My name is {} and I'm {} years old.".format(name, age) print(formatted_string) # 输出：My name is Alice and I'm 30 years old.示例2：使用位置参数：x = 5 y = 10 formatted_string = "The sum of {} and {} is {}."....
percentage = "{:.2f}%".format(value) # format the value to a string with 2 decimal places and append a "%" sign print(percentage) # output: 50.00% （2）使用f-string python value = 0.5 # 50% in decimal form percentage = f"{value:.2f}%" # format the value to a string with...
Learn how to round a number to 2 decimal places in Python for improved precision using techniques like round(), format(), and string formatting techniques.
下面是一个完整的示例,演示了如何将字符串转换为浮点数并保留2位小数。 defconvert_to_float_with_2_decimal_places(s):num=float(s)formatted_num="{:.2f}".format(num)returnformatted_num# 测试s="3.14159"result=convert_to_float_with_2_decimal_places(s)print(result) ...
- 字符串格式化输出可以使用不同的格式规则,如占位符、格式化指令、模板字符串等方式来指定变量或常量嵌入到目标字符串中的方式。3 种模式 (1)%(2)format()(3)f-string 3.1 %符号格式化字符串 %符号格式化字符串是一种传统的格式化方法,通过在字符串中使用占位符%和格式化字符串中的参数来实现格式化输出...
String objects have a built-in functionality to make format changes, which also include an additional way of concatenating strings. Let’s take a look at it: In the example above, I generated a new string based on the input values of two already-created variables by using thecurly brackets...
Format the price to be displayed as a number with two decimals: txt ="The price is {:.2f} dollars" Try it Yourself » Check out all formatting types in ourString format() Reference. Multiple Values If you want to use more values, just add more values to the format() method: ...
In this example, note that each replacement field contains a string that starts with a colon. That’s a format specifier. The .2f part tells Python that you want to format the value as a floating-point number (f) with two decimal places (.2). Note: To learn more about the formatting...