Python for Web Developers — Learn It in a Weekend

If you know JavaScript, Python takes a weekend, not a semester. Same concepts, cleaner syntax.

The translation table

# JavaScript          →  Python
# const x = 5         →  x = 5
# if (a && b) {}      →  if a and b:
# arr.map(f)          →  [f(x) for x in arr]      # list comprehension
# obj.name            →  obj["name"]  or  obj.name (classes)
# console.log()       →  print()
# null / undefined    →  None

The data structures

marks = [88, 92, 79]                 # list  (array)
student = {"name": "Priya", "cgpa": 8.9}   # dict (object)
point = (10, 20)                     # tuple (immutable)
unique = {1, 2, 3}                   # set

total = sum(m for m in marks if m > 80)
name = student.get("name", "Unknown")

Web hello-world with Flask

from flask import Flask, jsonify
app = Flask(__name__)

@app.route("/api/hello")
def hello():
    return jsonify(message="Hello from Python!")

app.run(port=5000)

Gotchas from JS: indentation IS syntax (no braces), / always returns float, and there is no ++. Python opens data science doors too — one weekend, two career paths.

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