Python 3.14 is officially here, and brings a mix of changes to the core language, the interpreter's guts, and the standard library. These are major updates like template string literals, deferred ...

assert isinstance(exc_value, NameError) # find most recent frame if tb is None: return None while tb.tb_next is not None: tb = tb.tb_next frame = tb.tb_frame d ...

変数が未定義のため、NameErrorとなる。書籍の通りにデータフレームの変数名を定義すればNameErrorは解消される。 vital_value = vital_value_df.assign(**{ "年": vital_value["時間軸(年次)コード"].astype(int) // 1 ...