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There is another task in file handling that can be done using python and that is redirecting the output to an external file. Basically, the standard output can be printed to a file of the user's own choice. There are many ways to do this.

In this tutorial, we will see some ways to redirect output to files in Python.

write()Printing output to a file using the function in Python

This is an inbuilt Python function that helps to write or add the specified text to a file. wand aare 2 operations in this function which will write or add any text in the file. wis used when the user wants to empty the file before writing anything in it. Whereas is used when the user just wants to add some text to the existing text in the file a.

example:

with open("randomfile.txt", "a") as o:
    o.write("Hello")
    o.write("This text will be added to the file")

Note that open()the function is used here to open the file. The in the code aindicates that the text has been added to the file.

print()Printing output to a file using the function in Python

In this method, first, we call open()the function to open the required file. After that print()the function is used to print the text in the file. Using wthe operator or athe operator is always the user's choice.

example:

with open("randomfile.txt", "w") as external_file:
    add_text = "This text will be added to the file"
    print(add_text, file=external_file)
    external_file.close()

Note that the close() function is also used to close the file in the above code open(), after opening the file using close(). After calling the close() function, the file cannot be read, nor can anything else be written to it. If the user attempts to make any changes to the file after calling the close() function, an error will be thrown.close()close()close()

sys.stdoutPrint output to a file using

sysThe module is a built-in Python module that users use to work with various parts of the runtime environment in Python. To use it sys.stdout, you need to import the module first sys.

sys.stdoutIt is used when the user wants to display the output directly to the main console of the screen. The output can be in various forms, for example, it can be an input prompt, a print statement or just an expression. In this method, we will print a statement in a text file.

example:

import sys

file_path = "randomfile.txt"
sys.stdout = open(file_path, "w")
print("This text will be added to the file")

Note that before using sys.stdoutthe As Object statements to open and print a text file, an explicit file path must be defined by the user, otherwise no operations can be performed on the file.

contextlib.redirect_stdout()Printing output to a file using the function in Python

contextlibModules are typically withused with the statement.

contextlib.redirect_stdout()sys.stdoutThe function helps to temporarily redirect to a file by setting up a context manager .

example:

import contextlib

file_path = "randomfile.txt"
with open(file_path, "w") as o:
    with contextlib.redirect_stdout(o):
        print("This text will be added to the file")

As you can see, withstatements contextlibare used with the module's operations.