article Lesson 22 min
Numeric Primitives, Precision Traps & Sequence Protocol
Arbitrary precision integers, IEEE-754 float rounding errors, Fraction, Decimal, and sequence dunders.
Python handles numbers with remarkable flexibility, but production machine learning pipelines require an exact understanding of memory sizing and precision limitations.
Floats vs. Decimals
Standard Python floats are 64-bit binary approximations. For financial computations and hyperparameter limits, use decimal.Decimal with explicit rounding contexts.
from decimal import Decimal, getcontext
getcontext().prec = 6
val = Decimal('1.1') + Decimal('2.2')
print("Exact decimal:", val) # 3.3Python Systems: Interactive Lab
Python SystemsMatched to lessonInspects CPython type inheritance, issubclass(), and dynamic type registration.
Labs:
Metaclass Registration & Type Hierarchy Inspection
Python 3.13 • NumPy • PyTorch
Terminal Output
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