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a, b = b, a Developer T-Shirt

Black Heather / XS
£25.00
Sale price  £25.00 Regular price 
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a, b = b, a Developer T-Shirt

a, b = b, a swaps two variables in one line. The right-hand side is packed into a tuple first, then unpacked into the names on the left, so no temporary variable is needed — the thing most languages spend three lines on.

Tuple unpacking doing its quiet, obvious work.

£25.00
Sale price  £25.00 Regular price 
Mode: Dark Mode (Black Heather)
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100% cotton
Made to order
Dark + Light
Technical details
  • 100% combed and ring-spun cotton (Heather colours contain polyester)
  • Fabric weight: 4.2 oz./yd.² (142 g/m²)
  • Pre-shrunk fabric
  • Side-seamed construction
  • Shoulder-to-shoulder taping
  • Blank product sourced from Nicaragua, Mexico, Honduras, or the US

The fabric is slightly sheer and may appear see-through, particularly in lighter colours or bright lighting.

Printed on demand — each piece is made to order.

Care
  • Machine wash cold, inside out, with like colours
  • Tumble dry low, or hang to dry
  • Do not iron directly on the print
  • Do not bleach or dry clean
Shipping and returns

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We're constantly reviewing suppliers and expanding fulfilment options, and new routes may open over time.

EU Product Safety (GPSR) Compliance

Part of the Python collection, within Backend & Server.

Available in Dark Mode and Light Mode.

Python's Elegant Variable Swap: Understanding a, b = b, a

Python's Elegant Variable Swap: Understanding a, b = b, a

Swapping variables in Python takes one line: a, b = b, a. No temporary variable, no XOR tricks, just tuple unpacking doing what it's designed to do. It's clean, readable, and distinctly Pythonic.

Read the article

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