我想过滤一个数据框，但这样做有些困难。
我的数据框看起来像这样：
+--------+----------+--------+-------+-----+------+------+------+--------+------+----+----+----------+-----+-----+------+------+-------------+------+
| node | date | isSetl | qual | run | firm | acct | type | isCust | seg | ec | cc | currency | lov | sov | isM | pbc | spanReq | anov |
+--------+----------+--------+-------+-----+------+------+------+--------+------+----+----+----------+-----+-----+------+------+-------------+------+
| oReq | 20190627 | TRUE | final | 0 | FCG | 10 | S | TRUE | CUST | | | USD | | | MNT | CORE | 124073.69 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 10 | S | TRUE | CUST | | | CNY | | | | | 43480 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 10 | S | TRUE | CUST | | | USD | | | | | 117750 | 0 |
| oReq | 20190627 | TRUE | final | 0 | FCG | 10 | S | TRUE | CUST | | | USD | | | INIT | CORE | 124073.69 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 10 | S | TRUE | CUST | | | CNY | | | | | 43480 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 10 | S | TRUE | CUST | | | USD | | | | | 117750 | 0 |
| oReq | 20190627 | TRUE | final | 0 | FCG | 40 | S | TRUE | CUST | | | CNH | | | MNT | CORE | 0 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 40 | S | TRUE | CUST | | | CNY | | | | | 986680 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 40 | S | TRUE | CUST | | | HKD | | | | | 28786701 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 40 | S | TRUE | CUST | | | USD | | | | | 67790 | 0 |
| oReq | 20190627 | TRUE | final | 0 | FCG | 40 | S | TRUE | CUST | | | CNH | | | INIT | CORE | 0 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 40 | S | TRUE | CUST | | | CNY | | | | | 986680 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 40 | S | TRUE | CUST | | | HKD | | | | | 28786701 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 40 | S | TRUE | CUST | | | USD | | | | | 67790 | 0 |
| oReq | 20190627 | TRUE | final | 0 | FCG | 60 | S | TRUE | CUST | | | HKD | | | MNT | CORE | 17381842.35 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 60 | S | TRUE | CUST | | | HKD | | | | | 245850 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 60 | S | TRUE | CUST | | | USD | | | | | 2193000 | 0 |
| oReq | 20190627 | TRUE | final | 0 | FCG | 60 | S | TRUE | CUST | | | HKD | | | INIT | CORE | 17381842.35 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 60 | S | TRUE | CUST | | | HKD | | | | | 245850 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 60 | S | TRUE | CUST | | | USD | | | | | 2193000 | 0 |
| oReq | 20190627 | TRUE | final | 0 | FCG | 70 | S | TRUE | CUST | | | HKD | | | MNT | CORE | 163900 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 70 | S | TRUE | CUST | | | HKD | | | | | 163900 | 0 |
| oReq | 20190627 | TRUE | final | 0 | FCG | 70 | S | TRUE | CUST | | | HKD | | | INIT | CORE | 163900 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 70 | S | TRUE | CUST | | | HKD | | | | | 163900 | 0 |
| oReq | 20190627 | TRUE | final | 0 | FCG | 80 | S | TRUE | CUST | | | HKD | | | MNT | CORE | 25733800 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 80 | S | TRUE | CUST | | | HKD | | | | | 25733800 | 0 |
| oReq | 20190627 | TRUE | final | 0 | FCG | 80 | S | TRUE | CUST | | | HKD | | | INIT | CORE | 25733800 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 80 | S | TRUE | CUST | | | HKD | | | | | 25733800 | 0 |
+--------+----------+--------+-------+-----+------+------+------+--------+------+----+----+----------+-----+-----+------+------+-------------+------+
我想过滤，以便我需要列“ isM”中INIT下方的行
我想要的输出：
+--------+----------+--------+-------+-----+------+------+------+--------+------+----+----+----------+-----+-----+-----+-----+----------+------+
| node | date | isSetl | qual | run | firm | acct | type | isCust | seg | ec | cc | currency | lov | sov | isM | pbc | spanReq | anov |
+--------+----------+--------+-------+-----+------+------+------+--------+------+----+----+----------+-----+-----+-----+-----+----------+------+
| curReq | 20190627 | TRUE | final | 0 | FCG | 10 | S | TRUE | CUST | | | CNY | | | | | 43480 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 10 | S | TRUE | CUST | | | USD | | | | | 117750 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 40 | S | TRUE | CUST | | | CNY | | | | | 986680 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 40 | S | TRUE | CUST | | | HKD | | | | | 28786701 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 40 | S | TRUE | CUST | | | USD | | | | | 67790 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 60 | S | TRUE | CUST | | | HKD | | | | | 245850 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 60 | S | TRUE | CUST | | | USD | | | | | 2193000 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 70 | S | TRUE | CUST | | | HKD | | | | | 163900 | 0 |
| curReq | 20190627 | TRUE | final | 0 | FCG | 80 | S | TRUE | CUST | | | HKD | | | | | 25733800 | 0 |
+--------+----------+--------+-------+-----+------+------+------+--------+------+----+----+----------+-----+-----+-----+-----+----------+------+
我该如何过滤才能使输出保持原样？
在这方面需要一些指导。
答案 0 :(得分：1)
这应该可以解决问题。它将两个临时列添加到数据帧（df）：
temp来跟踪isM列等于INIT的行。这些行将在以后删除。
temp_ism向前填充isM列，以便查找INIT之后的所有行。
df = df.assign(temp=df['isM'].eq('INIT'), temp_ism=df['isM'].ffill())
# Drop the first `INIT` rows (`~df['temp']`) but retain the following rows.
result = df[df['temp_ism'].eq('INIT') & ~df['temp']].iloc[:, :-2] # Drop the two temporary columns.
df = df.iloc[:, :-2] # Drop the two temporary columns from the original dataframe.