python中bool函数

Python bool()函数 (Python bool() function)

bool() function is used to convert a given value to the Boolean value (True or False) as per the standard truth testing procedures. It accepts a value (like an integer, list, maps, etc) and converts it into a Boolean value.

bool()函数用于根据标准真值测试过程将给定值转换为布尔值(True或False)。 它接受一个值(如整数，列表，映射等)并将其转换为布尔值。

Some of the examples:

一些例子：

• None – converts to False

  无-转换为False

• False – converts to False

  False –转换为False

• Zeros (0, 0.0, 0j) – converts to False

  零(0，0.0，0j)–转换为False

• Empty sequences like, (), [], ' ' – converts to False

  空序列，如()，[]，''–转换为False

Syntax:

句法：

    bool([value])

Parameter: value – a value to be converted to the Boolean value, it’s an optional parameter, if we do not pass any parameter – it returns False.

参数： value-要转换为布尔值的值，它是可选参数，如果我们不传递任何参数，则返回False。

Return value: bool – a Boolean value

返回值： bool-布尔值

Example:

例：

    Input:
val = False
print("val = ", bool(val))
val = True
print("val = ", bool(val))
val = 10
print("val = ", bool(val))
val = 0
print("val = ", bool(val))
Output:
val =  False
val =  True
val =  True
val =  False

Python code to convert value to the Boolean value

Python代码将值转换为布尔值

# python code to demonstrate example
# of bool() function
val = False
print("val = ", bool(val))
val = True
print("val = ", bool(val))
val = 10
print("val = ", bool(val))
val = 0
print("val = ", bool(val))
val = 10.23
print("val = ", bool(val))
val = 0.0
print("val = ", bool(val))
val = "Hello"
print("val = ", bool(val))
val = []
print("val = ", bool(val))

Output

输出量

val =  False
val =  True
val =  True
val =  False
val =  True
val =  False
val =  True
val =  False

翻译自: https://www.includehelp.com/python/bool-function-with-example.aspx

python中bool函数