
# 
## The `os` module

The **`os` module** in Python provides functions that help in interacting with the underlying operating system. 

## The `truncate()` method

The **`truncate()` method** truncates the given file descriptor or the file path with respect to the given length in bytes.

## Syntax

--- 

```
truncate(path, length)
```

## Parameters

- **`path`**: This is the file path.
- **`length`**: This is the max length in bytes after truncation.

## Return value

This function returns nothing. 

## Code

import os

f_path = "file.txt"

f_contents = "hello-world\nhello-edpresso"

with open(f_path, "w") as f:
    f.write(f_contents)

print("Before truncation contents of the file: ")
f_contents = open(f_path).read()
print(f_contents)

os.truncate(f_path, 10)

print("--" * 5)
f_contents = open(f_path).read()
print("After truncation contents of the file: ")
print(f_contents)

# 
## Code explanation

- Line 1: We import the `os` module.
- Line 3:  We define a file path called `f_path`.
- Line 5: We define the file's contents called `f_contents`.
- Lines 7-8: We write `f_contents` to the file `f_path`.
- Lines 10-12: The contents of the `f_path` are read. These are then printed to the console before the truncation.
- Line 14: We truncate the file `f_path` to 10 bytes using the `os.truncate()` method. This method modifies the original file.
- Lines 16-19: The contents of the `f_path` are re-read. We then print these to the console after the truncation.

What is os.truncate() in Python?

The os.truncate() method in Python's os module truncates a file to a given length in bytes, modifying the original file.

What is os.truncate() in Python?

The os module

The truncate() method

Syntax

Parameters

Return value

Code

Code explanation

The `os` module

The `truncate()` method