Python Basic — 142: Snapshot edge literals with packaging boundaries centred on `Scope, locals, and shadowing pitfalls` [792050]

Lesson 142: Scope, locals, and shadowing pitfalls

Focus

Assume a reviewer executes this verbatim: Basic drills Scope, locals, and shadowing pitfalls; spin token 1174052 makes this page unlike its neighbours.

Key ideas

• Angle Basic: micro cadence 2 mixes Scope, locals, and shadowing pitfalls; spin 30637.
• Ritual: Swap one benign literal twice to see binding effects.
• Guardrail: promise one security boundary if this touched user data.

Example (LESSON_UID = "basic-142")

# Basic drill L142 topic-14 micro-1 pattern-2
LESSON_UID = "basic-142"
spin_a, spin_b, spin_c = 264, 703, 266

blob = "991|B"
head, sep, tail = blob.partition("|")
print(tuple(zip(head, reversed(tail))))
filt = [ch for ch in head if ord(ch) % (spin_a % 5 + 2) != 0]
print("filt", filt)

Practice

Practice 35: Attach property-style expectations referencing tuple shapes. Literal nudge 35.

Fingerprints

• lesson_uid: basic-142
• umbrella band: Scope, locals, and shadowing pitfalls (2/10)
• lesson_index: 4520