これは、プログラムの条件分岐において、非常に深刻なバグの原因となります。 対処法：floatで「お金」の計算をしてはいけない この誤差はfloat型の仕様（IEEE 754）によるものなので、floatを使う限り避けられません。

a = 10 b = 3 result = a * b print(result) # 30 べき乗 (**) result = 2 ** 3 # 2の3乗 print(result) # 8 result = 5 ** 2 # 5の2乗 print(result) # 25 摂氏30度 ...

Mypy, Pytype, Pyright, and Pyre can help you keep your type-hinted Python code bug-free. Let’s see what each of these useful tools has to offer. In the beginning, Python had no type decorations. That ...

Python is best thought of as a dynamic but strongly typed language. Types aren’t associated with the names of things, but with the things themselves. This makes Python flexible and convenient for ...