难度: hard/moderate
Write a concurrent prime sieve program for xv6 using pipes and the design illustrated in the picture halfway down this page and the surrounding text. This idea is due to Doug McIlroy, inventor of Unix pipes. Your solution should be in …
核心是应用 pd.Series, 具体操作如下:
import pandas as pddata {years: [2025],week: [{f"week_{i}": i for i in range(3)}]}
df pd.DataFrame(data)
print(df)df pd.concat([df, df[week].apply(pd.Series)], axis1).drop(week, axis1)…