我有一个sframe：
+---------+------+-------------------------------+-----------+------------------+
| term_id | lang | term_str | term_type | reliability_code |
+---------+------+-------------------------------+-----------+------------------+
| IATE-14 | ro | Agenție de aprovizionare | fullForm | 3 |
| IATE-84 | bg | компетенции на държави чле... | fullForm | 3 |
| IATE-84 | cs | příslušnost členských stát... | fullForm | 3 |
| IATE-84 | da | medlemsstatskompetence | fullForm | 3 |
| IATE-84 | de | Zuständigkeit der Mitglied... | fullForm | 3 |
| IATE-84 | el | αρμοδιότητα των κρατών μελ... | fullForm | 3 |
| IATE-84 | en | competence of the Member S... | fullForm | 3 |
| IATE-84 | es | competencias de los Estado... | fullForm | 3 |
| IATE-84 | et | liikmesriikide pädevus | fullForm | 3 |
| IATE-84 | fi | jäsenvaltioiden toimivalta | fullForm | 3 |
| IATE-84 | fr | compétence des États membres | fullForm | 3 |
| IATE-84 | ga | inniúlacht na mBallstát | fullForm | 3 |
| IATE-84 | hu | tagállami hatáskör | fullForm | 3 |
| IATE-84 | it | competenza degli Stati membri | fullForm | 3 |
| IATE-84 | lt | valstybių narių kompetencija | fullForm | 2 |
| IATE-84 | lv | dalībvalstu kompetence | fullForm | 3 |
| IATE-84 | nl | bevoegdheid van de lidstaten | fullForm | 3 |
| IATE-84 | pl | kompetencje państw członko... | fullForm | 3 |
| IATE-84 | pt | competência dos Estados-Me... | fullForm | 3 |
| IATE-84 | ro | competența statelor membre... | fullForm | 3 |
+---------+------+-------------------------------+-----------+------------------+
我需要提取lang == 'de' or lang == 'en'的所有行，但我使用lang == 'en'提取的行需要有相应的lang == 'de'，以便它们共享相同的term_id。< / p>
我一直在使用graphlab和sframe：
sf = gl.SFrame.read_csv('iate.csv', delimiter='\t', quote_char='\0', column_type_hints=[str,str,unicode,str,int])
de = sf[sf['lang'] == 'de']
de_termids = de['term_id']
和de.print_rows(10)：
+------------+------+-------------------------------+-----------+------------------+
| term_id | lang | term_str | term_type | reliability_code |
+------------+------+-------------------------------+-----------+------------------+
| IATE-84 | de | Zuständigkeit der Mitglied... | fullForm | 3 |
| IATE-290 | de | Schutz der öffentlichen Ge... | fullForm | 3 |
| IATE-662 | de | mengenmäßigen Ausfuhrbesch... | fullForm | 3 |
| IATE-801 | de | Eintragungshindernisse | fullForm | 2 |
| IATE-1326 | de | Sonderregelung für Reisebü... | fullForm | 4 |
| IATE-1702 | de | Erwerbslose | fullForm | 4 |
| IATE-2818 | de | Verwaltungsvorschriften | fullForm | 3 |
| IATE-21139 | de | frisches Obst und Gemüse | fullForm | 3 |
| IATE-21563 | de | chemische Erzeugnisse zur ... | fullForm | 3 |
| IATE-21564 | de | Mineralsäuren | fullForm | 3 |
+------------+------+-------------------------------+-----------+------------------+
然后：
en = sf[sf['lang'] == 'en']
en.print_rows(10)
[OUT]：
+------------+------+-------------------------------+--------------+------------------+
| term_id | lang | term_str | term_type | reliability_code |
+------------+------+-------------------------------+--------------+------------------+
| IATE-84 | en | competence of the Member S... | fullForm | 3 |
| IATE-254 | en | award of public works cont... | fullForm | 3 |
| IATE-290 | en | public health protection | fullForm | 3 |
| IATE-662 | en | quantitative restriction o... | fullForm | 3 |
| IATE-801 | en | grounds for refusal | fullForm | 2 |
| IATE-1299 | en | CEP | abbreviation | 3 |
| IATE-1326 | en | special scheme for travel ... | fullForm | 3 |
| IATE-2818 | en | regulations | fullForm | 3 |
| IATE-7128 | en | company name | fullForm | 2 |
| IATE-21139 | en | fresh fruits and vegetables | fullForm | 3 |
+------------+------+-------------------------------+--------------+------------------+
我试过了：
en_de = en[en['term_id'] in de_termids]
但是我的语法错误，给了我这个错误：
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call last)
<ipython-input-12-9656091794b8> in <module>()
1 en = sf[sf['lang'] == 'en']
----> 2 en_de = en[en['term_id'] in de_termids]
/usr/local/lib/python2.7/dist-packages/graphlab/data_structures/sarray.pyc in __contains__(self, item)
691
692 """
--> 693 return (self == item).any()
694
695 def contains(self, item):
/usr/local/lib/python2.7/dist-packages/graphlab/data_structures/sarray.pyc in __eq__(self, other)
973 return SArray(_proxy = self.__proxy__.vector_operator(other.__proxy__, '=='))
974 else:
--> 975 return SArray(_proxy = self.__proxy__.left_scalar_operator(other, '=='))
976
977
/usr/local/lib/python2.7/dist-packages/graphlab/cython/context.pyc in __exit__(self, exc_type, exc_value, traceback)
47 if not self.show_cython_trace:
48 # To hide cython trace, we re-raise from here
---> 49 raise exc_type(exc_value)
50 else:
51 # To show the full trace, we do nothing and let exception propagate
RuntimeError: Runtime Exception. Array size mismatch
我应该如何过滤sframe，以便获得包含en和de以及相应term_id的行？
结果数据框应如下所示：
+---------+-----------------+-------------+
| term_id | term_str_en | term_str_de |
+---------+-------------------------------+
| IATE-999 | something | etwas |
...
+---------+-----------------+-------------+
如何对pandas执行相同操作？
答案 0 :(得分：2)
假设您已经有两个数据框，其中包含两种语言的过滤数据：df_en和df_de。然后你可以merge他们：
new_df = pd.merge(df_en[['term_id','term_str']], df_de[['term_id','term_str']], how = 'inner', on ='term_id', suffixes = ('_en', '_de'))
方法inner负责跳过所有不匹配的行。
您可以在pandas docs和refs
merge的更多选项
修改
没有创建两个数据框（df的相同结果是包含所有条目的原始数据框，也可能包含其他语言）：
new_df = pd.merge(df.loc[df['lang']=='en',['term_id','term_str']], df.loc[df['lang']=='de',['term_id','term_str']], how = 'inner', on ='term_id', suffixes = ('_en', '_de'))
答案 1 :(得分：1)
由于您只获得了大熊猫的答案，因此在代码示例中给出de_termids和en时，如何在SFrame中执行此操作：
en.filter_by(de_termids, 'term_id')
答案 2 :(得分：0)
你的意思是，对于每个term_id，lang应该是＆＃39; de＆＃39;或者＆＃39; de＆＃39; en＆＃39; en＆＃39;） 但不是＆＃39; en＆＃39;只要？如果是的话，
我认为你可以选择lang =＆＃39; de＆＃39;或者＆＃39; en＆＃39;并过滤掉只有＆＃39; en＆＃39;的term_id。在朗朗
答案 3 :(得分：0)
我现在正在打电话，但我想你想利用索引对齐并加入。
例如
de_terms = sf [sf ['lang'] == 'de'].set_index ('term_id')
这将使term_id成为数据帧的索引。对en执行相同操作，然后使用新名称将术语列从一个分配给另一个。
通常，目标确定包含哪些索引，例如如果您只想包含'en'条目，如果它们也有'de'，但是所有'de'，则将en列合并到de frame中;仅在en帧中的索引将被删除。或者，您可以进行过滤以获得无纳米的布尔组合。