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How to Read a CSV File from Amazon S3 Using Python (With Headers and Rows Displayed)

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  Introduction If you’re working with cloud data, especially on AWS, chances are you’ll encounter data stored in CSV files inside an Amazon S3 bucket . Whether you're building a data pipeline or a quick analysis tool, reading data directly from S3 in Python is a fast, reliable, and scalable way to get started. In this blog post, we’ll walk through: Setting up access to S3 Reading a CSV file using Python and Boto3 Displaying headers and rows Tips to handle larger datasets Let’s jump in! What You’ll Need An AWS account An S3 bucket with a CSV file uploaded AWS credentials (access key and secret key) Python 3.x installed boto3 and pandas libraries installed (you can install them via pip) pip install boto3 pandas Step-by-Step: Read CSV from S3 Let’s say your S3 bucket is named my-data-bucket , and your CSV file is sample-data/employees.csv . ✅ Step 1: Import Required Libraries import boto3 import pandas as pd from io import StringIO boto3 is...
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How to Write Recursive Function in Python Quickly

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Here's an example to write RECURSIVE function in Python. It acts like a loop that iterate within the function to perform some operation. Precisely, if you call the same function from function is called recursive function.  
 

Recursion in Python


Python recursive function

Here are four rules a developer should know before writing recursive function in Python:

  1. There must be a key variable, which will be responsible for the termination of recursion.
  2. To determine the base value, which the key variable has to meet to reach the termination.
  3. To make sure the key variable must approach the base value in every recursive call.
  4. To make the recursive function terminate when the key variable reaches the base value.


Python recursive example


Here is an example python recursive function.

# This program computes the factorial of a number using recursion
#function definition
def fact(n):
"computes factorial using recursion"
if n == 0:
    return 1
else :
    return n * fact(n - 1)

# Function call
num = input("enter a number:")
num = int(num)
result = fact(num)
print("factorial=", result)


Advantages


Here are the advantages of recursive function.
  • Recursive functions divide the problem into smaller similar fragments and then computes them.
  • The recursive code looks precise and cleaner as compared to using loops. Here is how to call SQL from python

Disadvantages


Here are the disadvantages of recursive function.
  • It's hard to develop
  • Its is hard to understand the recursive functions

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