Python os.utime()用法及代碼示例

Python中的OS模塊提供了與操作係統進行交互的函數。操作係統屬於Python的標準實用程序模塊。該模塊提供了使用依賴於操作係統的函數的便攜式方法。

os.utime()Python中的os模塊的method方法用於設置指定路徑的訪問和修改時間。

用法： os.utime(path, times = None, *, [ns, ]dir_fd = None, follow_symlinks = True)

參數：
path：表示有效文件係統路徑的字符串或字節對象。
times(可選)：格式為(atime，mtime)的2元組，其中每個成員都是整數或浮點值，分別表示訪問時間和修改時間(以秒為單位)。
ns(可選)：格式為(atime_ns，mtime_ns)的2元組，其中每個成員都是整數或浮點值，分別表示訪問時間和修改時間(以納秒為單位)。
dir_fd:引用目錄的文件描述符。此參數的默認值為“無”。
follow_symlinks:布爾值True或False。如果為True，則方法將遵循符號鏈接，否則不進行。

返回類型：此方法不返回任何值

代碼1：用於os.utime()方法

# Python program to explain os.utime() method  
    
# importing os module  
import os 
  
# Path 
path = '/home / ihritik / Documents / file.txt'
  
# Print current access and modification time 
# of the above specified path 
print("Current access time:", os.stat(path).st_atime) 
print("Current modification time:", os.stat(path).st_mtime) 
  
# Access time in seconds 
atime = 200000000
  
# Modification time in seconds 
mtime = 100000000
  
# Set the access time and  
# modification time for the 
# above specified path 
# using os.utime() method 
tup = (atime, mtime) 
os.utime(path, tup) 
  
print("\nAccess and modification time changed\n") 
  
# Print current access and modification time 
print("Current access time:", os.stat(path).st_atime) 
print("Current modification time:", os.stat(path).st_mtime) 
  
# Either we can specify times 
# or specify ns parameter. 
# It is an error to specify 
# tuples for both times and ns

輸出：

Current access time (in seconds): 1568930018.710342
Current modification time (in seconds): 1568930018.610892

Access and modification time changed

Current access time (in seconds): 200000000.0
Current modification time (in seconds): 100000000.0

代碼2：如果指定了ns參數，

# Python program to explain os.utime() method  
    
# importing os module  
import os 
  
  
# Path 
path = '/home / ihritik / Documents / file.txt'
  
  
# Print current access and modification time 
# of the above specified path 
print("Current access time (in seconds):", os.stat(path).st_atime) 
print("Current modification time (in seconds):", os.stat(path).st_mtime) 
  
# Access time in nanoseconds 
atime_ns = 20000000012345
  
# Modification time in nanoseconds 
mtime_ns = 10000000012345
  
# Set the access time and  
# modification time in nanoseconds  
# for the above specified path 
# using os.utime() method 
# (ns is keyword only argument)  
tup = (atime_ns, mtime_ns) 
os.utime(path, ns = tup) 
  
print("\nAccess and modification time changed\n") 
  
# Print current access and modification time 
print("Current access time (in seconds):", os.stat(path).st_atime) 
print("Current modification time (in seconds):", os.stat(path).st_mtime) 
  
# Either we can specify times 
# or specify ns parameter. 
# It is an error to specify 
# tuples for both times and ns

輸出：

Current access time (in seconds): 1568930018.710342
Current modification time (in seconds): 1568930018.610892

Access and modification time changed

Current access time (in seconds): 20000.000012345
Current modification time (in seconds): 10000.000012345

代碼3：如果times參數為None且ns參數未指定

# Python program to explain os.utime() method  
    
# importing os module  
import os 
  
  
# Path 
path = '/home / ihritik / Documents / file.txt'
  
  
# Print current access and modification time 
# of the above specified path 
print("Current access time (in seconds):", os.stat(path).st_atime) 
print("Current modification time (in seconds):", os.stat(path).st_mtime) 
  
  
# Set the access time and  
# modification time in nanoseconds  
# for the above specified path 
# using os.utime() method 
os.utime(path) 
  
print("\nAccess and modification time changed\n") 
  
# Print current access and modification time 
print("Current access time (in seconds):", os.stat(path).st_atime) 
print("Current modification time (in seconds):", os.stat(path).st_mtime) 
  
# If times is None and ns is unspecified, 
# then it will be equivalent to 
# specifying ns = (atime_ns, mtime_ns) 
# where member atime_ns and mtime_ns 
# are current time in nanoseconds

輸出：

Current access time (in seconds): 20000.000012345
Current modification time (in seconds): 10000.000012345

Access and modification time changed

Current access time (in seconds): 1568930018.710342
Current modification time (in seconds): 1568930018.610892

參考： https://docs.python.org/3/library/os.html#os.utime

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注：本文由純淨天空篩選整理自ihritik大神的英文原創作品 Python | os.utime() method。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。