Python File Handling

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Python File Handling

File handling plays a crucial role in many applications, especially when working with data storage, logs, uploads, or configuration files.

Python provides built-in functions that allow you to create, read, modify, and remove files easily, without needing extra libraries.

Working with Files in Python

The primary function used for file operations in Python is open().

This function connects your program to a file and returns a file object that you can work with.

Basic Syntax

file_object = open("filename.txt", "mode")

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• filename → Name (or path) of the file

• mode → Specifies how the file should be opened

File Open Modes

Example

# Binary modes file = open("image.jpg", "rb") file2 = open("output.jpg", "wb")

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Opening a File for Reading

Example

data = open("notes.txt")

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This works because default mode is "rt"

Equivalent Code

data = open("notes.txt", "rt")

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Example: Reading File Content

file = open("notes.txt", "r") content = file.read() print(content) file.close()

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Note: Always remember to close the file after finishing operations.

Example: Using with Statement

with open("notes.txt", "r") as file: print(file.read())

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Note: This approach is cleaner and safer.

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