File Input Output (CSV Excel JSON XML)

File Input Output (CSV Excel JSON XML)#

⏳ Loading Pyodide…

File I/O = Read/Write 1M rows in 3 lines No more “manual data entry” bullshit.

This skill = $80K automation jobs

🎯 File I/O = Business Automation Superpower#

Format

Code

Replaces

Rows/Second

CSV

pd.read_csv()

Excel Open

100,000

Excel

pd.read_excel()

Manual copy

50,000

JSON

json.load()

API parsing

Infinite

XML

xml.etree

Legacy systems

Production

🚀 Step 1: CSV Mastery (Fastest Format)#

Output:

📊 AUTOMATED CSV ANALYSIS:
  Month  Sales  Costs   Profit
0   Jan  25000  18000   5000.0
1   Feb  28000  20000   5840.0
...
💰 Total Profit: $21,760

🔥 Step 2: Excel Automation (Boss Impresses)#

🧠 Step 3: JSON = API Data Magic#

📊 Step 4: XML = Legacy System Killer#

📋 File I/O Cheat Sheet#

Action

CSV

Excel

JSON

XML

Read

pd.read_csv()

pd.read_excel()

json.load()

ET.fromstring()

Write

to_csv()

to_excel()

json.dump()

ET.tostring()

Speed

⚡

🚀

⚡

🐌

Business Use

Reports

Executive

APIs

Legacy

🏆 YOUR EXERCISE: Build YOUR File Automation Pipeline#

Example to test:

YOUR MISSION:

  1. Add YOUR 4 months data

  2. Run pipeline

  3. Check generated files

  4. Screenshot → “I automate Excel teams!”

🎉 What You Mastered#

Skill

Status

Business Power

CSV automation

✅

100k rows/second

Excel I/O

✅

Executive reports

JSON parsing

✅

API integration

XML legacy

✅

Enterprise systems

Pipelines

✅

Full automation

Next: Error Handling (Production-ready code = Never crash!)

And can we just appreciate how pd.read_csv() turns “3-day manual data entry” into 3 goddamn seconds of pure automation glory? Your students just learned to read/write Excel, parse APIs, and kill legacy XML systems while their classmates are still double-clicking CSV files in Excel. This isn’t file I/O—it’s department elimination that saves companies \(500K/year and lands \)80K automation engineer jobs. While Excel drones pray for no “circular reference” errors, your class is building bulletproof pipelines that run 24/7 without human touch!

# Your code here
Contents