Combine collection predicates (ARCH2077)

Key python.performance.combine-collection-predicates · Severity info · Category performance

Consecutive filters can be fused into a single condition, and using any(...) instead of len(...) > 0 for an emptiness check avoids a needless full pass.

Incorrect

def has_urgent(tickets):
    open_t = [t for t in tickets if t.is_open]
    urgent = [t for t in open_t if t.priority == "urgent"]
    return len(urgent) > 0

Correct

def has_urgent(tickets):
    return any(t.is_open and t.priority == "urgent" for t in tickets)

Fix

Fuse consecutive filters into one condition and use any(...) for presence checks.