An integer is a whole number with no decimal places. For example, 1 is an integer, but 1.0 isn’t. The name for the integer data type is int, which you can see with type():Python >>> type(1) <class 'int'> You can create an integer by typing the desired number. For instance...
IntegerField:整数 DecimalField(max_digits=None, decimal_places= None):使用python的Decimal实例表示的十进制浮点数 DecimalField.max_digits:位数总数 Decimal Field.decimal_places:小数点后的数字位数 FloatField:用Python的float实例来表示的浮点数 DateField(auto_now= False, auto_now_add=False):使用 Python ...
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...
CharField(max_length=字符长度):字符串。 参数max_length表示最大字符个数。 TextField:大文本字段,一般超过4000个字符时使用。 IntegerField:整数。 DecimalField(max_digits=None, decimal_places=None):十进制浮点数。 参数max_digits表示总位数。 参数decimal_places表示小数位数。 FloatField:浮点数。 DateField[...
[int] = None, decimal_places: Optional[int] = None, min_items: Optional[int] = None,# 用于验证列表或元组字段的元素个数不少于指定的最小值 max_items: Optional[int] = None,# 用于验证列表或元组字段的元素个数不大于指定的最大值 unique_items: Optional[bool] = None, # 设置true,则验证列表...
>>> num = 4.123956>>> f"num rounded to 2 decimal places = {num:.2f}"'num rounded to 2 decimal places = 4.12'如果不做任何指定，那么浮点数用最大精度 >>> print(f'{num}')4.123956 格式化百分比数 >>> total = 87>>> true_pos = 34>>> perc = true_pos / total>>> perc0....
| assertAlmostEqual(self, first, second, places=None, msg=None, delta=None) | Fail if the two objects are unequal as determined by their | difference rounded to the given number of decimal places | (default 7) and comparing to zero, or by comparing that the ...
(models.Model): """商品价格表,通过外键关联商品信息表""" price = models.DecimalField(max_digits=10, decimal_places=2, default=0, verbose_name='售价') goods = models.ForeignKey(to='Goods', related_name='goods_price', on_delete=models.SET_NULL, blank=True, null=True,verbose_name='商品...
The d specifies that the value should be formatted as a digit with no decimal places. In the next section, you’ll learn how to specify the number of decimal places to show for a floating-point number. The second example shows how to create lists, add lists together, and print variables...
# Let's assume we have a dataframe dfdf = pd.DataFrame({ 'A': [1, 2, 3, 4], 'B': [0.1, 0.2, 0.3, 0.4]})# We want to format the values in column B as text with two decimal placesdf['C'] = df['B'].apply(lambda x: '{:.2f}'.format(x))print(df)SUBST...