formatted_num = format(num, '.2f') print("原始数值:", num) print("科学记数法:", num) print("转换为常规小数:", formatted_num) 在这个示例中,我们使用了SymPy库来表示科学记数法。首先,我们导入了symbols和Eq模块。然后,我们定义了一个符号变量num来表示我们要处理的数值。接下来,我们使用format()...
defconvert_scientific_notation(scientific_notation):converted_number=int(scientific_notation)returnconverted_number# 测试示例scientific_notation_1="1e6"converted_number_1=convert_scientific_notation(scientific_notation_1)print(converted_number_1)# 输出:1000000scientific_notation_2="3.14e-4"converted_number_...
例如,我们可以将较小的数字0.0000000123转换为正常的数字格式,并保留小数点后8位精度: num=0.0000000123num_str="{:.8f}".format(num)num_normal=float(num_str)print(num_normal) 1. 2. 3. 4. 输出结果为: 0.00000001 1. 在上面的代码中,我们使用"{:.8f}"指定了小数点后8位精度,并使用float函数将字...
第三个参数2代表步长,会从0开始,每次跳两位取值,所以会取出索引0、2、4、6、8的字符:print(str1[0:9:2])#hlopt反向切片:print(str1[:3])#从左边开始切,切左边的三个print(str1[3:] )#从左边开始切,除了左边的三个其他都打印print(str1[::-1])# ::代表反转将字符串翻过来 -1表示从...
python - Display a decimal in scientific notation - Stack Overflow https://stackoverflow.com/questions/6913532/display-a-decimal-in-scientific-notation What's the infinity number ? float('inf') Built-in Types — Python 3.7.4 documentation https://docs.python.org/3/library/stdtypes.html?hig...
# False - commas not allowed print(is_decimal("1.797693e+308")) # True 4. isdigit() and replace() to Find if a String is Float Another way to check if a string is a valid float is to use theisdigit()andreplace()methods. Theisdigit()method checks if all the characters in a strin...
In Python, floating point numbers (float) are positive and negative real numbers with a fractional part denoted by the decimal symbol . or the scientific notation E or e, e.g. 1234.56, 3.142, -1.55, 0.23. Example: Float Numbers Copy f = 1.2 print(f) #output: 1.2 print(type(f)) #...
no1=float(5800000.00000)no2=float(0.0000058)print(f"{no1:.1E}")print(f"{no2:.1E}") Production : 5.8E+065.8E-06 Notez que le modèle de format est le même que celui de la méthode ci-dessus. Le moduleNumPyen Python a une fonctionformat_float_scientific()qui peut être utilisée...
Arithmetic Expressions Make Python Lie to You Math Functions and Number Methods Round Numbers With round() Find the Absolute Value With abs() Raise to a Power With pow() Check if a Float Is Integral Print Numbers in Style Complex Numbers Conclusion: Numbers in Python Further ReadingRemove...
>>> type(1.0) <class 'float'> In the following sections, you’ll learn the basics of how to create and work with floating-point numbers in Python.Floating-Point LiteralsThe float type in Python designates floating-point numbers. To create these types of numbers, you can also use literals...