te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>python - Shift change the index of a dataframe - Stack Overflow

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    I am preparing a dataset in the "pd-multiindex" format for usage in a library called sktime. It looks like the following.

    instances time points a b      
0         0            2 -2
          1            1 -1
          2            1 -2
          3           -2  2
          4           -2  2
...                   .. ..
826       9           -1  1
          10          -1  0
          11           1  0
          12          -1  1
          13           2 -2

    The "instances" and "time points" form a multi-index. I would like to change the starting index of instances from 0 to 826 (and so the ending index would become 826+826=1652)

    I am preparing a dataset in the "pd-multiindex" format for usage in a library called sktime. It looks like the following.

    instances time points a b      
0         0            2 -2
          1            1 -1
          2            1 -2
          3           -2  2
          4           -2  2
...                   .. ..
826       9           -1  1
          10          -1  0
          11           1  0
          12          -1  1
          13           2 -2

    The "instances" and "time points" form a multi-index. I would like to change the starting index of instances from 0 to 826 (and so the ending index would become 826+826=1652)

    • python
    • sktime
    Share Improve this question asked Feb 17 at 15:53 Yu ColemanYu Coleman 434 bronze badges
    Add a comment  | 

    1 Answer 1

    Reset to default 1

    Try this code once

     import pandas as pd

# assuming your DataFrame with a MultiIndex

print("Before:", df.index.get_level_values(0).unique())

# Update the MultiIndex: add 826 to the first level 
df.index = df.index.map(lambda idx: (idx[0] + 826, idx[1]))

# Check the final answer
print("After:", df.index.get_level_values(0).unique())

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