熊猫：如何打开某些文件

Question

I am currently working on the data set from this link . But I am unable to read these files from Pandas? Has anyone tried to play with such files?

I am trying the following:

import pandas as pd

df = pd.read_csv("m_4549381c276b46c6.0000")

But I get the following error

Error tokenizing data. C error: Buffer overflow caught - possible malformed input file.

Answer 1

Those files are parts of a saved SFrame .

So you can load them this way:

import sframe

sf = sframe.SFrame('/path/to/dir/')

Demo: I've downloaded all files from people_wiki.gl and put them under: D:/download/sframe/

In [7]: import sframe

In [7]: sf = sframe.SFrame('D:/download/sframe/')

In [8]: sf
Out[8]:
Columns:
        URI     str
        name    str
        text    str

Rows: 59071

Data:
+-------------------------------+---------------------+
|              URI              |         name        |
+-------------------------------+---------------------+
| <http://dbpedia.org/resour... |    Digby Morrell    |
| <http://dbpedia.org/resour... |    Alfred J. Lewy   |
| <http://dbpedia.org/resour... |    Harpdog Brown    |
| <http://dbpedia.org/resour... | Franz Rottensteiner |
| <http://dbpedia.org/resour... |        G-Enka       |
| <http://dbpedia.org/resour... |    Sam Henderson    |
| <http://dbpedia.org/resour... |    Aaron LaCrate    |
| <http://dbpedia.org/resour... |   Trevor Ferguson   |
| <http://dbpedia.org/resour... |     Grant Nelson    |
| <http://dbpedia.org/resour... |     Cathy Caruth    |
+-------------------------------+---------------------+
+-------------------------------+
|              text             |
+-------------------------------+
| digby morrell born 10 octo... |
| alfred j lewy aka sandy le... |
| harpdog brown is a singer ... |
| franz rottensteiner born i... |
| henry krvits born 30 decem... |
| sam henderson born october... |
| aaron lacrate is an americ... |
| trevor ferguson aka john f... |
| grant nelson born 27 april... |
| cathy caruth born 1955 is ... |
+-------------------------------+
[59071 rows x 3 columns]
Note: Only the head of the SFrame is printed.
You can use print_rows(num_rows=m, num_columns=n) to print more rows and columns.

Now you can convert it to Pandas DF if you need:

In [17]: df = sf.to_dataframe()

In [18]: pd.options.display.max_colwidth = 40

In [19]: df.head()
Out[19]:
                                       URI                 name                                     text
0  <http://dbpedia.org/resource/Digby_M...        Digby Morrell  digby morrell born 10 october 1979 i...
1  <http://dbpedia.org/resource/Alfred_...       Alfred J. Lewy  alfred j lewy aka sandy lewy graduat...
2  <http://dbpedia.org/resource/Harpdog...        Harpdog Brown  harpdog brown is a singer and harmon...
3  <http://dbpedia.org/resource/Franz_R...  Franz Rottensteiner  franz rottensteiner born in waidmann...
4     <http://dbpedia.org/resource/G-Enka>               G-Enka  henry krvits born 30 december 1974 i...

In [20]: df.shape
Out[20]: (59071, 3)

Answer 2

Just clarifying on the answer by MaxU , you are trying to read it the wrong way. It is a raw file and its formatting is contained in the other files which are there in the same folder in that link . Pandas requires you to know the encoded format of the file beforehand (ie delimiters, number of columns etc). It cannot be used as a magic wand to read any file without being aware of it.

The IPython notebook just outside the folder in your link , shows exactly how to read that data. MaxU has correctly mentioned that the specific file in question is just a part of the SFrame which is a structure of GraphLab framework. Hence, you are trying to extract meaningful data just from a part of the whole and hence you can't do that meaningfully.

You can however read the graphlab file and convert it into a Pandas dataframe. For details see here .