What is the python os.access() method? What does os.access do?

In today’s article, let’s take a look at the python os.access() method. In this article, we will learn about the python os.acces method, which you may have never seen before, and understand its definition and function. Without further ado, let’s start learning.

Overview

The os.access() method uses the current uid/gid to try to access the path. Most operations use valid uid/gid, so the runtime environment can be tried in a suid/sgid environment.

Grammar

The access() method syntax format is as follows:

os.access(path, mode);

Parameters

## 1.path -- The path to be used to detect whether there is access permission.

2.mode -- mode is F_OK, test the path that exists, or it can be one or more of R_OK, W_OK and X_OK or R_OK, W_OK and X_OK.

3.os.F_OK: As the mode parameter of access(), test whether the path exists.

4.os.R_OK: Contained in the mode parameter of access(), testing whether the path is readable.

5.os.W_OK is included in the mode parameter of access() to test whether the path is writable.

6.os.X_OK is included in the mode parameter of access() to test whether the path is executable.

Return value

Returns True if access is allowed, otherwise returns False.

Example

The following example demonstrates the use of the access() method:

#!/usr/bin/python
# -*- coding: UTF-8 -*-
import os, sys
# 假定 /tmp/foo.txt 文件存在，并有读写权限
ret = os.access("/tmp/foo.txt", os.F_OK)
print "F_OK - 返回值 %s"% ret
ret = os.access("/tmp/foo.txt", os.R_OK)
print "R_OK - 返回值 %s"% ret
ret = os.access("/tmp/foo.txt", os.W_OK)
print "W_OK - 返回值 %s"% ret
ret = os.access("/tmp/foo.txt", os.X_OK)
print "X_OK - 返回值 %s"% ret

The output result of executing the above program is:

F_OK - 返回值 True
R_OK - 返回值 True
W_OK - 返回值 True
X_OK - 返回值 False

The above is all the content of this article. I hope what I said and the examples I gave can be helpful to you.

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