rounded_num = round(num, 2)使用Decimal模块 Python的decimal模块提供了一种精确的小数运算方式。我们可以使用这个模块中的getcontext().prec来设置小数点后的位数。from decimal import Decimal, ROUND_DOWNrounded_number = Decimal(3.14159265358979323846266).quantize(Decimal('0.00'), rounding=ROUND_DOWN)print(...
teachesusesDeveloper- name- experience+teachBeginner()Beginner- name+learn()PythonConversion+getStringInput()+checkIfDigit()+convertToFloat()+formatToTwoDecimals()+printResult() 在上面的类图中,Developer类表示经验丰富的开发者,Beginner类表示刚入行的小白,PythonConversion类表示Python字符串转换为两位浮点数...
Now, let me show you a few methods of how to format number with commas and 2 decimal places in Python. 1. Using f-strings (Python 3.6+) The first method to format a number with commas and 2 decimal places in Python is by using the f-strings method. Here’s how you can use f-s...
>>># 格式也支持二进制数>>>"int: {0:d}; hex: {0:x}; oct: {0:o}; bin: {0:b}".format(42)'int: 42; hex: 2a; oct: 52; bin: 101010'>>># with 0x, 0o, or 0b as prefix:>>>"int: {0:d}; hex: {0:#x}; oct: {0:#o}; bin: {0:#b}".format(42)'int: 42;...
>>> 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...
At the beginning of this chapter we explained how to use the.2fmodifier to format a number into a fixed point number with 2 decimals. There are several other modifiers that can be used to format values: Example Use a comma as a thousand separator: ...
For floating points the padding value represents the length of the complete output. In the example below we want our output to have at least 6 characters with 2 after the decimal point. Old '%06.2f'%(3.141592653589793,) New '{:06.2f}'.format(3.141592653589793) ...
>>> # format also supports binary numbers >>> "int: {0:d}; hex: {0:x}; oct: {0:o}; bin: {0:b}".format(42) 'int: 42; hex: 2a; oct: 52; bin: 101010' >>> # with 0x, 0o, or 0b as prefix: >>> "int: {0:d}; hex: {0:#x}; oct: {0:#o}; bin: {0:#...
2、字符串 字符串方法 find方法join方法split方法lower方法upper方法replace方法strip,lstrip和rstrip方法translate方法startswith方法endswith方法is开头的诸多方法 字符串格式化输出:format方法 调用参数参数格式转换python指定字符宽度,精度指定字符千分位分隔符对齐指定填充字符等号(=),指定将填充字符放在符号和数字之间 字符串...
:bTry itBinary format :cConverts the value into the corresponding unicode character :dTry itDecimal format :eTry itScientific format, with a lower case e :ETry itScientific format, with an upper case E :fTry itFix point number format ...