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我在 pandas 中有 2 个以下数据框:
电影
+---+------------------------------+--------------+-----------+
| | movie title | genre | tconst |
+---+------------------------------+--------------+-----------+
| 0 | Edison Kinetoscopic Record | Documentary | tt0000008 |
+---+------------------------------+--------------+-----------+
| 1 | La sortie des usines Lumière | Documentary | tt0000010 |
+---+------------------------------+--------------+-----------+
| 2 | The Arrival of a Train | Documentary | tt0000012 |
+---+------------------------------+--------------+-----------+
| 3 | The Oxford and Cambridge | NaN | tt0000025 |
+---+------------------------------+--------------+-----------+
| 4 | Le manoir du diable | Short|Horror | tt0000091 |
+---+------------------------------+--------------+-----------+
和船员
+---+-----------+-----------+---------+------+
| | tconst | directors | writers | year |
+---+-----------+-----------+---------+------+
| 0 | tt0000001 | nm0005690 | \N | 2001 |
+---+-----------+-----------+---------+------+
| 1 | tt0000002 | nm0721526 | \N | 2002 |
+---+-----------+-----------+---------+------+
| 2 | tt0000003 | nm0721526 | \N | 2003 |
+---+-----------+-----------+---------+------+
| 3 | tt0000004 | nm0721526 | \N | 2004 |
+---+-----------+-----------+---------+------+
| 4 | tt0000005 | nm0005690 | \N | 2005 |
+---+-----------+-----------+---------+------+
如何创建一个新的数据框，将 directors 和 year 列仅连接到 movies 数据框(使用 tconst 列)？