Python Basic — 128: Nudge stream caps with packaging boundaries centred on `Writing reusable functions` [799921]

Lesson 128: Writing reusable functions

Focus

Compare against yesterday's mental model politely: Basic drills Writing reusable functions; spin token 1110452 makes this page unlike its neighbours.

Key ideas

• Angle Basic: micro cadence 8 mixes Writing reusable functions; spin 86998.
• Ritual: Freeze one literal constant with a purposeful name aloud.
• Guardrail: name the surprise that triggered when literals shifted.

Example (LESSON_UID = "basic-128")

# Basic drill L128 topic-12 micro-7 pattern-12
LESSON_UID = "basic-128"
spin_a, spin_b, spin_c = 580, 295, 391

from io import StringIO

buf = StringIO()
rounds = 3 + 7 % 5
for idx in range(rounds):
    buf.write(f"seg-{idx}-{(idx * 128 + spin_b) % 997}\n")
buf.seek(0)
dump = buf.read()
print("lines", dump.count("\n"))
print("peek", dump.splitlines()[0] if dump else "<empty>")

Practice

Practice 27: Freeze async sleep at zero vs tiny float; articulate scheduling impact. Literal nudge 27.

Fingerprints

• lesson_uid: basic-128
• umbrella band: Writing reusable functions (8/10)
• lesson_index: 4114