Python File Handling

🐍 Python File Handling — Complete Guide

Python provides built-in functions to create, read, write, and manipulate files.
Files are essential for storing data persistently outside of your program.

1️⃣ Opening a File

Mode	Description
`'r'`	Read (default)
`'w'`	Write (overwrite)
`'a'`	Append
`'x'`	Create (fails if file exists)
`'rb'`	Read binary
`'wb'`	Write binary
`'r+'`	Read & write

2️⃣ Closing a File

Always close a file after use:

Better: use with statement (auto-close)

3️⃣ Reading a File

# Read entire file
with open("example.txt", "r") as file:
content = file.read()
print(content)# Read line by line
with open("example.txt", "r") as file:
for line in file:
print(line.strip())

# Read lines into a list
with open("example.txt", "r") as file:
lines = file.readlines()
print(lines)

# Read entire file

with open("example.txt", "r") as file:

content = file.read()

print(content)# Read line by line

with open("example.txt", "r") as file:

for line in file:

print(line.strip())

# Read lines into a list

with open("example.txt", "r") as file:

lines = file.readlines()

print(lines)

4️⃣ Writing to a File

5️⃣ File Pointer Methods

6️⃣ Working with Binary Files

7️⃣ Checking if File Exists

8️⃣ Deleting a File

9️⃣ Example: Read, Modify, and Save File

10️⃣ Best Practices

Use with statement → auto close files
Always handle exceptions when working with files
Use binary mode for images or non-text files

Python File Handling