Prerequisite: OS module in Python.

os.replace() method in Python is used to rename the file or directory. If destination is a directory, OSError will be raised. If the destination exists and is a file, it will be replaced without error if the action performing user has permission. This method may fail if the source and destination are on different filesystems.

Syntax: os.replace(source, destination, *, src_dir_fd=None, dst_dir_fd=None2)

Parameter:

• source: Name of file or directory which we want to rename.
• destination: Name which we want to give in destination.
• src_dir_id : This parameter stores the source directory's or file, 
             file descriptor referring to a directory.
• dst_dir_fd: It is a file descriptor referring to a directory, 
              and the path to operate. It should be relative, 
              path will then be relative to that directory. If 
              the path is absolute, dir_fd is ignored.

Return Type: This method does not return any value.

Code #1: Use of os.replace() method to rename a file.

# Python program to explain os.replace() method

# importing os module
import os

# file name
file = "f.txt"

# File location which to rename
location = "d.txt"

# Path
path = os.replace(file, location)

# renamed the file f.txt to d.txt
print("File %s is renamed successfully" % file)

Output:

File f.txt is renamed successfully

Code #2: Handling possible errors. (If necessary permissions are given then output will be as shown in below) 

# Python program to explain os.replace() method

# importing os module
import os

# Source file path
source = './file.txt'

# destination file path
dest = './da'


# try renaming the source path
# to destination path
# using os.rename() method

try:
    os.replace(source, dest)
    print("Source path renamed to destination path successfully.")

# If Source is a file
# but destination is a directory
except IsADirectoryError:
    print("Source is a file but destination is a directory.")

# If source is a directory
# but destination is a file
except NotADirectoryError:
    print("Source is a directory but destination is a file.")

# For permission related errors
except PermissionError:
    print("Operation not permitted.")

# For other errors
except OSError as error:

Output:

Source is a file but destination is a directory.