Pandas 基本操作记录

jieshenai2026-01-18 12:16

案例1 数据行和列切换

python 复制代码

names = ["张三", "李四", "王五"]
subjets = ["语文", "数学"]

for idx, subjet in enumerate(subjets):
    tmp_data = {
        "张三": 1 * (10 ** idx),
        "李四": 2 * (10 ** idx),
        "王五": 3 * (10 ** idx),
        "赵六": 4 * (10 ** idx),
        "X": 5 * (10 ** idx),
    }
    print(subjet, tmp_data)

Ouput:

复制代码

语文 {'张三': 1, '李四': 2, '王五': 3, '赵六': 4, 'X': 5}
数学 {'张三': 10, '李四': 20, '王五': 30, '赵六': 40, 'X': 50}

名字为Index

python 复制代码

df = pd.DataFrame()
for idx, subjet in enumerate(subjets):
    tmp_data = {
        "张三": 1 * (10 ** idx),
        "李四": 2 * (10 ** idx),
        "王五": 3 * (10 ** idx),
        "赵六": 4 * (10 ** idx),
        "X": 5 * (10 ** idx),
    }
    df[subjet] = pd.Series(tmp_data, index=names)
df

subject为Index

python 复制代码

data = []

for idx, subjet in enumerate(subjets):
    tmp_data = {
        "张三": 1 * (10 ** idx),
        "李四": 2 * (10 ** idx),
        "王五": 3 * (10 ** idx),
        "赵六": 4 * (10 ** idx),
        "X": 5 * (10 ** idx),
    }

    data.append(tmp_data)

new_df = pd.DataFrame(data, index=columns, columns=names)
new_df