Re: [pystatsmodels] 'keyword can't be an expression' for GLM specification

[josef...@gmail.com]

On Sun, Apr 28, 2013 at 5:46 PM, Brian Keegan <bke...@gmail.com> wrote:

Total noob to statsmodels (using fresh install of 0.5.0, patsy 0.1.0, pandas 0.9, python 2.7.3) here. I'm trying to follow the documentation for GLMs (http://statsmodels.sourceforge.net/devel/examples/generated/example_glm.html) to estimate some version of a binomial model and getting a cryptic error message: "keyword can't be an expression". The input is a 1239-row, 11-column pandas dataframe from which I'm specifying the model below. A normal OLS estimates correctly, but any GLM family I specify doesn't estimate. Any help would be appreciated! Thanks

In [100]:

df_paper_coauthorship = pd.DataFrame(data=d.values(),index=d.keys(),columns=d.values()[0].keys())

df_paper_coauthorship.head(1).T

Out[100]:

	192858
degree	30
downloads	948
authors	3
closeness	0.245614
node_type	paper
year	1994
clustering	1
name	Life and death of new technology: task, utilit...
betweenness	0
citations	13
publications	-1

In [122]:

y1,X1 = dmatrices('downloads ~ authors + year + degree',data=df_paper_coauthorship,return_type='dataframe')

In [120]:

X1.head()

Out[120]:

	Intercept	authors	year	degree
192858	1	3	1994	30
192878	1	1	1994	2
2441981	1	4	2013	11
1180956	1	2	2006	12
1180955	1	1	2006	7

In [119]:

y1.head()

Out[119]:

	downloads
192858	948
192878	1483
2441981	45
1180956	1765
1180955	653

In [121]:

mod1 = sm.GLM(y1,X1.family=sm.families.Binomial())

res1 = mod1.fit()

pprint(res1.summary())

  File "<ipython-input-121-0b7ad9bf1600>", line 1
SyntaxError: keyword can't be an expression

 

Hi,

Can you post the full traceback?  Or is that all?

 

can you try regular print instead of pprint?

 

Josef

[Wes McKinney]

Hi Brian,

you have a typo in the line:

mod1 = sm.GLM(y1,X1.family=sm.families.Binomial())

it should be

mod1 = sm.GLM(y1,X1, family=sm.families.Binomial())


N.B.
In [1]: def f(a, b=None):
   ...:     pass
   ...: 

In [2]: f(a, x.y=2)
  File "<ipython-input-2-124d23405480>", line 1
    f(a, x.y=2)
SyntaxError: keyword can't be an expression