Python Basic — 078: Re-shape executor etiquette with thread-safe queues centred on `for loops, range(), and iteration habits` [7346] — Learn

Lesson 078: for loops, range(), and iteration habits

Focus

Anchor one invariant before you branch mentally: Basic drills for loops, range(), and iteration habits; spin token 685981 makes this page unlike its neighbours.

Key ideas

Angle Basic: micro cadence 8 mixes for loops, range(), and iteration habits; spin 58356.
Ritual: List two regressions CI should catch later.
Guardrail: name the surprise that triggered when literals shifted.

Example (`LESSON_UID = "basic-078"`)

# Basic drill L078 topic-7 micro-7 pattern-2
LESSON_UID = "basic-078"
spin_a, spin_b, spin_c = 523, 26, 272

blob = "546|H"
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 33: Verbal-diff this against lesson 77 aloud. Literal nudge 33.

Fingerprints

lesson_uid: basic-078
umbrella band: for loops, range(), and iteration habits (8/10)
lesson_index: 2514