python - Simple pandas pivot table issue -


i have dataframe below:

+-------+--------+----------+---------------+ |       | ios_id | video_id | feed_position | +-------+--------+----------+---------------+ | 11995 | user1  |      199 |             7 | | 11996 | user2  |      164 |            18 | | 11997 | user3  |      209 |             1 | | 11998 | user3  |       85 |             4 | | 11999 | user3  |       45 |             6 | | 12000 | user3  |      150 |            10 | | 12001 | user3  |      207 |            12 | | 12002 | user3  |      203 |            26 | | 12003 | user4  |      209 |             1 | | 12004 | user4  |      202 |             1 | | 12005 | user4  |      204 |             1 | | 12006 | user4  |      126 |             2 | | 12007 | user4  |       72 |             5 | | 12008 | user4  |      108 |            10 | | 12009 | user4  |       85 |            11 |

what create pivot table counts instances of each ios_id each video_id , feed_position. this:

+------------+---+---+---+---+---+---+----+----+----+----+----+ | row labels | 1 | 2 | 4 | 5 | 6 | 7 | 10 | 11 | 12 | 18 | 26 | +------------+---+---+---+---+---+---+----+----+----+----+----+ |         45 |   |   |   |   | 1 |   |    |    |    |    |    | |         72 |   |   |   | 1 |   |   |    |    |    |    |    | |         85 |   |   | 1 |   |   |   |    |  1 |    |    |    | |        108 |   |   |   |   |   |   |  1 |    |    |    |    | |        126 |   | 1 |   |   |   |   |    |    |    |    |    | |        150 |   |   |   |   |   |   |  1 |    |    |    |    | |        164 |   |   |   |   |   |   |    |    |    |  1 |    | |        199 |   |   |   |   |   | 1 |    |    |    |    |    | |        202 | 1 |   |   |   |   |   |    |    |    |    |    | |        203 |   |   |   |   |   |   |    |    |    |    |  1 | |        204 | 1 |   |   |   |   |   |    |    |    |    |    | |        207 |   |   |   |   |   |   |    |    |  1 |    |    | |        209 | 2 |   |   |   |   |   |    |    |    |    |    | +------------+---+---+---+---+---+---+----+----+----+----+----+

i tried:

pd.pivot_table(df, values=['ios_id'],                index=['video_id'], columns=['video_id',                'feed_position'], aggfunc=np.count_nonzero)

but met error: keyerror: 'level video_id not found'

any thoughts on how can accomplish this?

you had it, don't include 'video_id' in columns : columns what's going along top of pivot table, , index what's going down left.

pd.pivot_table(df2, columns = ['feed_position'],                      index = ['video_id'],                      aggfunc= np.count_nonzero)                ios_id                                     feed_position     1   2   4   5   6   10  11  12  18  26 video_id                                                 45               nan nan nan nan   1 nan nan nan nan nan 72               nan nan nan   1 nan nan nan nan nan nan 85               nan nan   1 nan nan nan   1 nan nan nan 108              nan nan nan nan nan   1 nan nan nan nan 126              nan   1 nan nan nan nan nan nan nan nan 150              nan nan nan nan nan   1 nan nan nan nan 164              nan nan nan nan nan nan nan nan   1 nan 202                1 nan nan nan nan nan nan nan nan nan 203              nan nan nan nan nan nan nan nan nan   1 204                1 nan nan nan nan nan nan nan nan nan 207              nan nan nan nan nan nan nan   1 nan nan 209                2 nan nan nan nan nan nan nan nan nan

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