Re: Can't get iterator in the C API

2022-02-09 Thread Jen Kris via Python-list 
Thank you for clarifying that.  Now on to getting the iterator from the method. 
 

Jen


Feb 8, 2022, 18:10 by pyt...@mrabarnett.plus.com:

> On 2022-02-09 01:12, Jen Kris via Python-list wrote:
>
>> I am using the Python C API to load the Gutenberg corpus from the nltk 
>> library and iterate through the sentences.  The Python code I am trying to 
>> replicate is:
>>
>> from nltk.corpus import gutenberg
>> for i, fileid in enumerate(gutenberg.fileids()):
>>      sentences = gutenberg.sents(fileid)
>>      etc
>>
>> where gutenberg.fileids is, of course, iterable.
>>
>> I use the following C API code to import the module and get pointers:
>>
>> int64_t Call_PyModule()
>> {
>>      PyObject *pModule, *pName, *pSubMod, *pFidMod, *pFidSeqIter,*pSentMod;
>>
>>      pName = PyUnicode_FromString("nltk.corpus");
>>      pModule = PyImport_Import(pName);
>>
>>      if (pModule == 0x0){
>>      PyErr_Print();
>>      return 1; }
>>
>>      pSubMod = PyObject_GetAttrString(pModule, "gutenberg");
>>      pFidMod = PyObject_GetAttrString(pSubMod, "fileids");
>>      pSentMod = PyObject_GetAttrString(pSubMod, "sents");
>>
>>      pFidIter = PyObject_GetIter(pFidMod);
>>      int ckseq_ok = PySeqIter_Check(pFidMod);
>>      pFidSeqIter  = PySeqIter_New(pFidMod);
>>
>>      return 0;
>> }
>>
>> pSubMod, pFidMod and pSentMod all return valid pointers, but the iterator 
>> lines return zero:
>>
>> pFidIter = PyObject_GetIter(pFidMod);
>> int ckseq_ok = PySeqIter_Check(pFidMod);
>> pFidSeqIter  = PySeqIter_New(pFidMod);
>>
>> So the C API thinks gutenberg.fileids is not iterable, but it is.  What am I 
>> doing wrong?
>>
> Look at your Python code. You have "gutenberg.fileids()", so the 'fileids' 
> attribute is not an iterable itself, but a method that you need to call to 
> get the iterable.
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>

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Re: Can't get iterator in the C API

2022-02-08 Thread MRAB 

On 2022-02-09 01:12, Jen Kris via Python-list wrote:

I am using the Python C API to load the Gutenberg corpus from the nltk library 
and iterate through the sentences.  The Python code I am trying to replicate is:

from nltk.corpus import gutenberg
for i, fileid in enumerate(gutenberg.fileids()):
     sentences = gutenberg.sents(fileid)
     etc

where gutenberg.fileids is, of course, iterable.

I use the following C API code to import the module and get pointers:

int64_t Call_PyModule()
{
     PyObject *pModule, *pName, *pSubMod, *pFidMod, *pFidSeqIter,*pSentMod;

     pName = PyUnicode_FromString("nltk.corpus");
     pModule = PyImport_Import(pName);

     if (pModule == 0x0){
     PyErr_Print();
     return 1; }

     pSubMod = PyObject_GetAttrString(pModule, "gutenberg");
     pFidMod = PyObject_GetAttrString(pSubMod, "fileids");
     pSentMod = PyObject_GetAttrString(pSubMod, "sents");

     pFidIter = PyObject_GetIter(pFidMod);
     int ckseq_ok = PySeqIter_Check(pFidMod);
     pFidSeqIter  = PySeqIter_New(pFidMod);

     return 0;
}

pSubMod, pFidMod and pSentMod all return valid pointers, but the iterator lines 
return zero:

pFidIter = PyObject_GetIter(pFidMod);
int ckseq_ok = PySeqIter_Check(pFidMod);
pFidSeqIter  = PySeqIter_New(pFidMod);

So the C API thinks gutenberg.fileids is not iterable, but it is.  What am I 
doing wrong?

Look at your Python code. You have "gutenberg.fileids()", so the 
'fileids' attribute is not an iterable itself, but a method that you 
need to call to get the iterable.

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Can't get iterator in the C API

2022-02-08 Thread Jen Kris via Python-list 
I am using the Python C API to load the Gutenberg corpus from the nltk library 
and iterate through the sentences.  The Python code I am trying to replicate is:

from nltk.corpus import gutenberg
for i, fileid in enumerate(gutenberg.fileids()):
    sentences = gutenberg.sents(fileid)
    etc

where gutenberg.fileids is, of course, iterable. 

I use the following C API code to import the module and get pointers:

int64_t Call_PyModule()
{
    PyObject *pModule, *pName, *pSubMod, *pFidMod, *pFidSeqIter,*pSentMod;

    pName = PyUnicode_FromString("nltk.corpus");
    pModule = PyImport_Import(pName);

    if (pModule == 0x0){
    PyErr_Print();
    return 1; }

    pSubMod = PyObject_GetAttrString(pModule, "gutenberg");
    pFidMod = PyObject_GetAttrString(pSubMod, "fileids");
    pSentMod = PyObject_GetAttrString(pSubMod, "sents");

    pFidIter = PyObject_GetIter(pFidMod);
    int ckseq_ok = PySeqIter_Check(pFidMod);
    pFidSeqIter  = PySeqIter_New(pFidMod);

    return 0;
}

pSubMod, pFidMod and pSentMod all return valid pointers, but the iterator lines 
return zero: 

pFidIter = PyObject_GetIter(pFidMod);
int ckseq_ok = PySeqIter_Check(pFidMod);
pFidSeqIter  = PySeqIter_New(pFidMod);

So the C API thinks gutenberg.fileids is not iterable, but it is.  What am I 
doing wrong?


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