Number --> Decimal Decimal --> |input| Format Decimal --> |output| Round Decimal --> |output| String 流程图 最后,让我们用mermaid语法中的flowchart TD来整理一下保留n位小数的流程: num=3.1415926, n=2{:.{}f}3.14%.2fStartInputNumberFormatOutputPrintOutputRoundOutputStringOutputEnd 通过以上介绍,...
1.3进制转换 binary_str='0b101'# 字符串2进制转10进制decimal_value=int(binary_str,2)print(decimal_value)# 输出:5# 十进制整型decimal_number=10# 转八进制octal_str=oct(decimal_number)# 转十六进制hex_str=hex(decimal_number)print(octal_str)# 输出:0o12print(hex_str)# 输出:0xA 1.4数学函数 ...
importtimeit# 使用字符串格式化的方法defmethod1():num=5decimal_num='{:0.2f}'.format(num)# 使用decimal模块的方法defmethod2():fromdecimalimportDecimal num=5decimal_num=Decimal(num).quantize(Decimal('0.00'))# 测试性能print('Method 1:',timeit.timeit(method1,number=1000000))print('Method 2:',...
decimal_sym = self.locale.number_symbols.get('decimal',".") value = babel.numbers.format_decimal(value,"#,##0.00", locale=self.locale)# If no babel, use Django's built-in locale dataelse: value ="%.02f"% self curr_sym = self.currency decimal_sym = get_format('DECIMAL_SEPARATOR',...
number = 0.9124325345 # 百分比 fstring = f'Percentage format for number with two decimal places: {number:.2%}' print(fstring) # Percentage format for number with two decimal places: 91.24% # 保留小数点后3位 fstring = f'Fixed point format for number with three decimal places: {number:.3f...
{0} was {1:.2f}%".format("semester",78.234876))# For no decimal placesprint("My average of this {0} was {1:.0f}%".format("semester",78.234876))# Convert an integer to its binary or# with other different converted bases.print("The {0} of 100 is {1:b}".format("binary",100...
'__rmul__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'capitalize', 'casefold', 'center', 'count', 'encode', 'endswith', 'expandtabs', 'find', 'format', 'format_map', 'index', 'isalnum', 'isalpha', 'isdecimal', 'isdigit', 'isidentifier', 'islower...
'{:4d}'.format(42) Output 42 Again similar to truncating strings the precision for floating point numbers limits the number of positions after the decimal point. For floating points the padding value represents the length of the complete output. In the example below we want our output to have...
s.isdigit、isdecimal 和 s.isnumeric 区别 isdigit() True: Unicode数字,byte数字(单字节),全角数字(双字节) False: 汉字数字,罗马数字,小数 Error:无 isdecimal() True: Unicode数字,,全角数字(双字节) False: 罗马数字,汉字数字,小数 Error: byte数字(单字节) isnumeric() True: Unicode 数字,全角数字(...
Finally, you use the precision option to display a floating-point number using different precisions. You use two, four, and eight digits after the decimal separator, respectively. Unfortunately, the modulo operator doesn’t support the string formatting mini-language, so if you use this tool to...