import pandas as pd
# 建立一個小表格
data = {"姓名": ["小明", "小華", "小美"], "年齡": [20, 25, 30]}
df = pd.DataFrame(data)
# 看前幾列
print("表格內容:")
print(df.head())
# 篩選年齡大於22的
print("\n年齡大於22的人:")
print(df[df["年齡"] > 22])
# 新增一欄
df["是否成年"] = df["年齡"] >= 18
print("\n加上新欄位後:")
print(df)
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