Python| os.path.getmtime() 方法

Python中的OS 模块提供了与操作系统交互的功能。操作系统属于 Python 的标准实用程序模块。该模块提供了一种使用操作系统相关功能的可移植方式。 os.path模块是Python中OS 模块的子模块，用于常见的路径名操作。
Python中的os.path.getmtime()方法用于获取指定路径的最后修改时间。此方法返回一个浮点值，该值表示自纪元以来的秒数。如果文件不存在或无法访问，此方法会引发OSError 。
注意：纪元代表时间开始的点。它依赖于平台。对于 Unix，纪元是 1970 年 1 月 1 日 00:00:00 (UTC)。

Syntax: os.path.getmtime(path)
Parameter: 
path: A path-like object representing a file system path. A path-like object is either a string or bytes object representing a path.
Return Type: This method returns a floating-point value of class ‘float’ that represents the time (in seconds) of last modification of the specified path. 
 

代码 #1：使用 os.path.getmtime() 方法

Python3

# Python program to explain os.path.getmtime() method
   
# importing os and time module
import os
import time
 
# Path
path = '/home/User/Documents/file.txt'
 
# Get the time of last
# modification of the specified
# path since the epoch
modification_time = os.path.getmtime(path)
print("Last modification time since the epoch:", access_time)
 
# convert the time in
# seconds since epoch
# to local time
local_time = time.ctime(modification_time)
print("Last modification time(Local time):", local_time)

输出：

Last modification time since the epoch: 1558447897.0442736
Last modification time (Local time): Tue May 21 19:41:37 2019

代码 #2：使用 os.path.getmtime() 方法时处理错误

Python3

# Python program to explain os.path.getmtime() method
   
# importing os, time and sys module
import os
import sys
import time
 
# Path
path = '/home/User/Documents/file2.txt'
 
# Get the time of last
# modification of the specified
# path since the epoch
try:
    modification_time = os.path.getmtime(path)
    print("Last modification time since the epoch:", modification_time)
 
except OSError:
    print("Path '%s' does not exists or is inaccessible" %path)
    sys.exit()
 
# convert the time in
# seconds since epoch
# to local time
local_time = time.ctime(modification_time)
print("Last modification time(Local time):", local_time)
 
 
# above code will print
# path does not exists or is inaccessible'
# if the specified path does not
# exists or is inaccessible

输出：

Path '/home/User/Documents/file2.txt' does not exists or is inaccessible

参考： https://docs。 Python.org/3/library/os.path.html