# Python 中的 Epsilon

Aditya Raj 2023年1月30日

## 什麼是 Python 中的 Epsilon

Epsilon 在 Python 中沒有任何特殊含義。它不是關鍵字，你可以使用術語 epsilon 來定義變數名稱。

## 在 Python 中計算 Epsilon

``````epsilon = 1.0
while epsilon + 1 > 1:
epsilon = epsilon / 2
epsilon = epsilon * 2
print("The value of epsilon is:", epsilon)
``````

``````The value of epsilon is: 2.220446049250313e-16
``````

## 在 Python 中使用 `sys` 模組查詢 Epsilon

Python 為我們提供了 `sys` 模組，以使用 Python 程式在系統上執行各種操作。

`sys` 模組中的 `float_info` 物件包含各種浮點常量和限制的定義。你可以在以下示例中觀察到這一點。

``````import sys

print(sys.float_info)
``````

``````sys.float_info(max=1.7976931348623157e+308, max_exp=1024, max_10_exp=308, min=2.2250738585072014e-308, min_exp=-1021, min_10_exp=-307, dig=15, mant_dig=53, epsilon=2.220446049250313e-16, radix=2, rounds=1)
``````

``````import sys

epsilon = sys.float_info.epsilon
print("The value of epsilon is:", epsilon)
``````

``````The value of epsilon is: 2.220446049250313e-16
``````

## 在 Python 中使用 `Numpy` 模組查詢 Epsilon

`finfo()` 方法也用於獲取浮點常量和限制。它將文字 `float` 作為輸入引數並返回 `numpy.finfo` 型別的物件。

``````import numpy

epsilon = numpy.finfo("float").eps
print("The value of epsilon is:", epsilon)
``````

``````The value of epsilon is: 2.220446049250313e-16
``````

## まとめ

Aditya Raj is a highly skilled technical professional with a background in IT and business, holding an Integrated B.Tech (IT) and MBA (IT) from the Indian Institute of Information Technology Allahabad. With a solid foundation in data analytics, programming languages (C, Java, Python), and software environments, Aditya has excelled in various roles. He has significant experience as a Technical Content Writer for Python on multiple platforms and has interned in data analytics at Apollo Clinics. His projects demonstrate a keen interest in cutting-edge technology and problem-solving, showcasing his proficiency in areas like data mining and software development. Aditya's achievements include securing a top position in a project demonstration competition and gaining certifications in Python, SQL, and digital marketing fundamentals.

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