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) 1. 2. 3. 4. 5. 6. 7....
>>> 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...
float number } INTEGER ||--o{ FLOAT 上面的关系图表示整数和六位小数之间的关系,整数有一个属性number,而六位小数也有一个属性number,二者之间通过箭头表示关联关系。 总结一下,Python中可以通过format函数或者f-string来输出整数的小数部分。控制小数精度可以通过在输出格式中添加精度参数来实现。在科学计算和数据...
decimal_ = Decimal.from_float(10.245) print('浮点数转为Decimal后:{0}'.format(decimal_)) # 浮点数转为Decimal后:10.2449999999999992184029906638897955417633056640625 从结果来看,float浮点数转换完成以后精度位数就变得很长不是原先的三位小数了,这是因为float浮点数本身就不精确转换之后才会出现上面的效果。 Decimal...
You can also specify text alignment using the greater than operator:>. For example, the expression{:>3.2f}would align the text three spaces to the right, as well as specify a float number with two decimal places. Conclusion In this article, I included an extensive guide of string data typ...
...Python中的浮点数(float)是基于IEEE 754标准的双精度浮点数,它们以二进制形式存储,因此不能精确地表示所有的十进制小数。例如,0.1在二进制中是一个无限循环小数,因此无法精确表示。...格式化输出:支持将Decimal对象格式化为字符串,方便输出或存储。...格式化输出 如果你只是需要控制输出时的精度,...
format_string("%d", x, grouping=True) '1,234,567' >>> locale.format_string("%s%.*f", (conv['currency_symbol'], ... conv['frac_digits'], x), grouping=True) '$1,234,567.80' 11.2. TemplatingThe string module includes a versatile Template class with a simplified syntax suitable ...
>>> str='string learn' >>> dir(str) ['__add__', '__class__', '__contains__', '__delattr__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__getslice__', '__gt__', '__hash__', '__init__...
To format decimal places, f-strings use a simple colon followed by a period and the number of desired decimal places. Let's see this with an example: # Controlling decimal places pi = 3.14159 price = 19.99999 percentage = 0.8525 print(f"Pi to 2 decimal places: {pi:.2f}") print(f"Pr...
Here, the format specifier is stored in a variable and then used inside the f-string. This technique is useful for creating flexible and reusable formatting code. $ python main.py 16.03.24 24/03/16 Formatting floats F-strings make it easy to control the number of decimal places when displa...