Python | os.utime() method - GeeksforGeeks

03 Oct, 2019
OS module in Python provides functions for interacting with the operating system. OS comes under Python’s standard utility modules. This module provides a portable way of using operating system dependent functionality.
os.utime() method of os module in Python is used to set the access and modified time of the specified path.
Syntax: os.utime(path, times = None, *, [ns, ]dir_fd = None, follow_symlinks = True)
Parameter:path: A string or bytes object representing a valid file system path.times (optional): A 2-tuple of the form (atime, mtime) where each member is an integer or float value representing access time and modification time in seconds respectively.ns (optional): A 2-tuple of the form (atime_ns, mtime_ns) where each member is an integer or float value representing access time and modification time in nanoseconds respectively.dir_fd: A file descriptor referring to a directory. The default value of this parameter is None.follow_symlinks: A boolean value either True or False. If True method will follow symbolic link otherwise not.
Return Type: This method does not return any value
Code #1: Use of os.utime() method
# Python program to explain os.utime() method     # importing os module import os  # Pathpath = '/home / ihritik / Documents / file.txt'  # Print current access and modification time# of the above specified pathprint("Current access time:", os.stat(path).st_atime)print("Current modification time:", os.stat(path).st_mtime)  # Access time in secondsatime = 200000000  # Modification time in secondsmtime = 100000000  # Set the access time and # modification time for the# above specified path# using os.utime() methodtup = (atime, mtime)os.utime(path, tup)  print("\nAccess and modification time changed\n")  # Print current access and modification timeprint("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
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

Code #2: If ns parameter is specified,
# Python program to explain os.utime() method     # importing os module import os    # Pathpath = '/home / ihritik / Documents / file.txt'    # Print current access and modification time# of the above specified pathprint("Current access time (in seconds):", os.stat(path).st_atime)print("Current modification time (in seconds):", os.stat(path).st_mtime)  # Access time in nanosecondsatime_ns = 20000000012345  # Modification time in nanosecondsmtime_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 timeprint("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
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

Code #3: If times parameter is None and ns parameter is unspecified
# Python program to explain os.utime() method     # importing os module import os    # Pathpath = '/home / ihritik / Documents / file.txt'    # Print current access and modification time# of the above specified pathprint("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() methodos.utime(path)  print("\nAccess and modification time changed\n")  # Print current access and modification timeprint("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 
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

Reference: https://docs.python.org/3/library/os.html#os.utime
python-os-module
python-utility
Python
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