假设我有一个如下所示的数据框:
+---+-----------+-----------+
| id| address1| address2|
+---+-----------+-----------+
| 1|address 1.1|address 1.2|
| 2|address 2.1|address 2.2|
+---+-----------+-----------+
我想将自定义函数直接应用于address1 and address2列,例如:
def example(string1, string2):
name_1 = string1.lower().split(' ')
name_2 = string2.lower().split(' ')
intersection_count = len(set(name_1) & set(name_2))
return intersection_count
我想将结果存储在一个新列中,以便我的最终数据框如下所示:
+---+-----------+-----------+------+
| id| address1| address2|result|
+---+-----------+-----------+------+
| 1|address 1.1|address 1.2| 2|
| 2|address 2.1|address 2.2| 7|
+---+-----------+-----------+------+
我尝试以曾经将内置函数应用于整个列的方式执行它,但出现错误:
>>> df.withColumn('result', example(df.address1, df.address2))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 2, in example
TypeError: 'Column' object is not callable
我做错了什么以及如何将自定义函数应用于选定列中的字符串?