将浮点数转换为字符串,然后去除多余的0。 判断去除多余0后的字符串是否为"0"。 下面是一个示例代码: defis_float_empty(num):num_str=str(num).rstrip('0').rstrip('.')returnnum_str=="0"num=0.0000001ifis_float_empty(num):print("Float is empty") 1. 2. 3. 4. 5. 6. 7. 在这个示例中...
importmathdefcheck_float(value):ifvalue==value:print("The float value is not empty")else:print("The float value is empty")defcheck_float_math(value):ifmath.isnan(value):print("The float value is empty")else:print("The float value is not empty")# 检查一个非空的float值a=3.14check_fl...
Thefloat()function can be used to check if a string is a floating-point number in Python, actually, this method converts a string to a floating-point number however, we can use this to check string contains a float value. When passed a string that cannot be converted to a float, it ...
二、基本类型-int、float、bool、None 1、int int(),可以对浮点数进行去整操作,可将数字字符串转换成整形。与input结合使用来获取用户的数值输入。 x = 3 # 定义变量 x = int(3.14) # 3 x = int("123") # 123 type(x) is int # True # 提示用户输入一个整数 user_input = input("请输入一个...
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...
需要float返回注释,否则 Mypy 推断为Any,并且不检查方法体。②即使没有注释,Mypy 也能推断出这返回一个complex。根据您的 Mypy 配置,注释可以避免警告。③这里SupportsComplex确保datum是可转换的。④这种显式转换是必要的,因为SupportsComplex类型没有声明.real和.imag属性,这在下一行中使用。例如,Vector2d没有这些...
Python语言比起C++、Java等主流语言,语法更简洁,也更接近英语,对编程世界的新人还是很友好的,这也是其显著优点。最近总有人问我Python相关的问题,这些问题也偏基础,自古有句话,授人以鱼不如授人以渔,刚好趁五一时间总结了几篇Python的知识点,帮助小伙伴成功入坑Python,将这门工具语言顺利掌握起来。 Python常用数据...
print(int(False)) # 0 print(float(True)) # 1.0 ▍44、在算术运算中使用布尔值 x = 10 y = 12 result = (x - False)/(y * True) print(result) # 0.833333333333333 ▍45、将任何数据类型转换为布尔值 print(bool(.0)) # False print(bool(3)) # True print(bool("-")) # True print(...
>>> def check_type(number):... if type(number) == int:... print('do something with anint')... if isinstance(number, (int,float)):... print('do something with anint or float')...>>> check_type(5)do something with an intdo something with an int or float>>> ...
a = float('inf') b = float('nan') c = float('-iNf') # These strings are case-insensitive d = float('nan')Output:>>> a inf >>> b nan >>> c -inf >>> float('some_other_string') ValueError: could not convert string to float: some_other_string >>> a == -c # inf==...