Python program to Check if a File Exists or not.............program 48/50.........

To print the content of a file in Python only if it exists, you can combine a file existence check with file reading operations.

Here's how to achieve this using the os.path.exists() function and a with statement for file handling:

Python

import os

file_path = "your_file_name.txt"  # Replace with the actual file path

if os.path.exists(file_path):
    # The file exists, now open and print its content
    try:
        with open(file_path, 'r') as file:
            content = file.read()
            print(f"Content of '{file_path}':")
            print(content)
    except Exception as e:
        print(f"An error occurred while reading the file: {e}")
else:
    print(f"The file '{file_path}' does not exist.")

Explanation:

• import os: 

  This line imports the os module, which provides functions for interacting with the operating system, including file system operations.
• file_path = "your_file_name.txt": 

  This variable stores the path to the file you want to check and potentially print. Remember to replace "your_file_name.txt" with the actual name and path of your file.
• if os.path.exists(file_path):: 

  This is the core of the existence check. os.path.exists() returns True if the specified file_path refers to an existing file or directory, and False otherwise.
• with open(file_path, 'r') as file:: 

  If the file exists, this block opens the file in read mode ('r'). The with statement ensures that the file is automatically closed even if errors occur.
• content = file.read(): 

  This reads the entire content of the file and stores it in the content variable.
• print(f"Content of '{file_path}':") 

  and print(content): These lines print a header and then the actual content of the file.
• except Exception as e:: 

  This try-except block is included for robust error handling during file reading, in case issues like permission errors arise even if the file exists.
• else:: 

  If os.path.exists() returns False, this block is executed, indicating that the file was not found.
• .................................Using os.path.exists()

This method is part of the os module and returns True if the specified file exists; otherwise, it is False.

import os
# Python Check if file exists
if os.path.exists('filename.txt'):
    print("File exists")
else:
    print("File does not exist")