python 示例

文件关闭属性 (File closed Property)

closed Property is an inbuilt property of File object (IO object) in Python, it can be used to check whether a file object (i.e. a file) is closed or not, this is a read-only property and returns a Boolean value (True – if file is closed, False – if file is not closed).

关闭属性是Python中文件对象(IO对象)的内置属性，可用于检查文件对象(即文件)是否关闭，这是只读属性，并返回布尔值(真) –如果文件已关闭，则为False –如果文件未关闭)。

Syntax:

句法：

file_object.closed

Parameter(s):

参数：

• None

  没有

Return value:

返回值：

The return type of this method is <class 'bool'>, it returns a Boolean value.

该方法的返回类型为<class'bool'> ，它返回一个布尔值。

Example:

例：

# Python File closed Property with Example# opening files in various modesfile1 = open("myfile1.txt", "w")file2 = open("myfile3.txt", "a")file3 = open("myfile4.txt", "wb")# checking files are closed or notprint("Before closing the files...")print("file1.closed: ", file1.closed)print("file2.closed: ", file2.closed)print("file3.closed: ", file3.closed)# closing the filesfile1.close()file2.close()file3.close()# checking files are closed or notprint("After closing the files...")print("file1.closed: ", file1.closed)print("file2.closed: ", file2.closed)print("file3.closed: ", file3.closed)

Output

输出量

Before closing the files...file1.closed:  Falsefile2.closed:  Falsefile3.closed:  FalseAfter closing the files...file1.closed:  Truefile2.closed:  Truefile3.closed:  True

翻译自:

python 示例