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...
>>> 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...
1. 2. 3. 使用f-string num=3.1415926formatted_num=f"{num:.2f}"print(formatted_num)# 输出 3.14 1. 2. 3. 全局保持两位数 有时候我们希望在整个程序中都保持数字的格式为两位小数。这时可以自定义一个函数或者类来实现全局保持两位数的功能。 defkeep_two_decimal_places(num):return"{:.2f}".format(...
Learn how to round a number to 2 decimal places in Python for improved precision using techniques like round(), format(), and string formatting techniques.
percentage = f"{value:.2f}%" # format the value to a string with 2 decimal places and append a "%" sign print(percentage) # output: 50.00% 在Python中，我们可以使用多种方法来输出百分比。最常用的方法是使用print()函数和格式化字符串。从Python 3.6开始，推荐使用f-strings(格式化字符串字面...
pi = 3.141592653589793 formatted_string = "Pi is approximately {:.2f} or {:.5f} decimal places.".format(pi, pi) print(formatted_string) # 输出：Pi is approximately 3.14 or 3.14159 decimal places.注意事项 在使用format函数时，有一些技巧和注意事项可以帮助你更有效地使用它。了解不同的...
❮ String Methods ExampleGet your own Python Server Insert the price inside the placeholder, the price should be in fixed point, two-decimal format: txt ="For only {price:.2f} dollars!" print(txt.format(price =49)) Try it Yourself » ...
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: ...
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...
提交数据的时候,goods_price 值为12.1 但是查询出来是保留2位小数点 12.10 写到数据库的数据是12.1 序列化 DecimalField 关于DecimalField(max_digits, decimal_places, coerce_to_string=None, max_value=None, min_value=None)相关参数 max_digits 数字中允许的最大位数。 它必须是 None 或大于等于 decimal_plac...