AI检测代码解析 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. 6. 7. 8. 在上面的代码中,我...
这里我们调用了float_to_two_decimal_places函数并传入了3.1415926作为参数,然后打印函数的返回值。运行上述代码,我们将得到保留两位小数的结果3.14。 五、总结 通过本文我们学习了如何使用Python实现一个保留两位小数的函数。首先,我们通过将浮点数转换为字符串来进行处理,然后使用字符串的format方法将浮点数保留两位小数。...
Learn how to round a number to 2 decimal places in Python for improved precision using techniques like round(), format(), and string formatting techniques.
我们在设置商品价格的时候,希望保留两位小数,FloatField是浮点数无法精确小数点几位,DecimalField可以精确几位小数点 DecimalField models.py设置商品表模型的时候,可以把商品价格设置DecimalField max_digits=10 整数位的长度为10位 decimal_places=2 小数点后2位 blank=True 允许为空格 null=True 允许为空 default=0...
The .fromhex() method takes a string that represents a floating-point number as an argument and builds an actual float number from it.In both methods, the hexadecimal string has the following format:Python [sign] ["0x"] integer ["." fraction] ["p" exponent] ...
11.8. Decimal Floating Point ArithmeticThe decimal module offers a Decimal datatype for decimal floating point arithmetic. Compared to the built-in float implementation of binary floating point, the class is especially helpful forfinancial applications and other uses which require exact decimal ...
/ Binary Division a / b The quotient of a divided by b, expressed as a float % Binary Modulo a % b The remainder of a divided by b // Binary Floor division or integer division a // b The quotient of a divided by b, rounded to the next smallest whole number ** Binary Exponentiat...
On the other hand, we might want to format the numerical output of a float variable. For example, in the case a product with taxes: In this case between thecurly bracketswe’re writing a formatting expression. These expressions are needed when we want to tell Python to format our values ...
(serializers.ModelSerializer):"""序列化商品models"""create_time=serializers.DateTimeField(format='%Y-%m-%d %H:%M:%S',required=False)update_time=serializers.DateTimeField(format='%Y-%m-%d %H:%M:%S',required=False)goods_price=serializers.DecimalField(max_digits=10,decimal_places=2,max_value=...
>>> msg = 'hello world'>>> 'msg: {}'.format(msg)'msg: hello world'有了f-string后，可以简化成如下：>>> msg = 'hello world'>>> f'msg: {msg}''msg: hello world’可以看到，用fstring明显就清晰简化了很多，并且也更加具有可读性。fstring的一般用法如下：可以f或者F开头，可以添加r或者R，...