Astringis a Python data type that’s used to represent a piece of text. It’s written between quotes, either double quotes or single quotes and can be as short as zero characters, or empty string, or as long as you wish. Strings can beconcatenatedto build longer strings using the plus...
>>> 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...
示例4：使用格式化占位符和格式化选项：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...
round()函数可以对float类型的数据进行四舍五入,并将结果转换为string类型。 # 使用round()函数将float四舍五入并转换为stringfloat_number=3.14159decimal_places=2# 小数位数rounded_number=round(float_number,decimal_places)string_number=str(rounded_number)print(string_number)# 输出: "3.14" 1. 2. 3. 4...
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...
decimal_places 以数字存储的小数位数。 max_value 验证所提供的数字不大于这个值。 min_value 验证所提供的数字不小于这个值。 localize 设置为 True 以便基于当前区域启用输入和输出本地化。 这也将强制 coerce_to_string 为 True。 默认为 False。 请注意,如果在设置文件中设置了 USE_L10N = True,则会启用数...
A string in Python is a sequence of characters. It is a derived data type. Strings are immutable. This means that once defined, they cannot be changed. Many Python methods, such asreplace,join, orsplitmodify strings. However, they do not modify the original string. They create a copy of...
Those curly braces support a simple formatting language that you can use to alter the appearance of the value in the final formatted string.For example, to format the value of n in the above example to two decimal places, replace the contents of the curly braces in the f-string with {n...
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...
numeric-string ::= [sign] numeric-value | [sign] nan 当上面出现 digit 时也允许其他十进制数码。 其中包括来自各种其他语言系统的十进制数码(例如阿拉伯-印地语和天城文的数码)以及全宽数码 '\uff10' 到 '\uff19'。如果value 是一个 tuple ,它应该有三个组件,一个符号( 0 表示正数或 1 表示负数),...