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How to create an array of structs of arbitrary size cython

0

I would like to know how can I create an array of structs in Cython that I can populate and make computations afterwards.

Example

Here I have the Cython code

%%cython 
cimport numpy as cnp
cimport cython


from collections import namedtuple

Couple = namedtuple('Couple', ['female', 'male'], verbose=False)

cdef struct CyCouple:
 int female
 int male


cpdef int np_cy_count_women_earning_more2(list py_couples):

 cdef:
 int count = 0, r, N
 CyCouple cy_couples[100_0000] # THIS IS HARDCODED

 N = len(py_couples)

 make_CyCouple_array(py_couples, cy_couples, N)

 for n in range(N):
 r = cy_couples[n].female > cy_couples[n].male
 count += r
 return count

I would like to have a general versions instead of the definition in # THIS IS HARDCODED.

What could I do?

cython

share|improve this question

edited Mar 21 at 19:33

David Buchaca

asked Mar 21 at 19:09

David BuchacaDavid Buchaca

1113

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  There is a lot of unnecessary code, if all you want to know is how to dynamically allocate cy_couples!
  
  – ead
  Mar 21 at 19:30
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Possible duplicate of Cython: creating an array throws "not allowed in a constant expression"
  
  – DavidW
  Mar 21 at 19:42
  

  
  
  
  

add a comment | 

0

I would like to know how can I create an array of structs in Cython that I can populate and make computations afterwards.

Example

Here I have the Cython code

%%cython 
cimport numpy as cnp
cimport cython


from collections import namedtuple

Couple = namedtuple('Couple', ['female', 'male'], verbose=False)

cdef struct CyCouple:
 int female
 int male


cpdef int np_cy_count_women_earning_more2(list py_couples):

 cdef:
 int count = 0, r, N
 CyCouple cy_couples[100_0000] # THIS IS HARDCODED

 N = len(py_couples)

 make_CyCouple_array(py_couples, cy_couples, N)

 for n in range(N):
 r = cy_couples[n].female > cy_couples[n].male
 count += r
 return count

I would like to have a general versions instead of the definition in # THIS IS HARDCODED.

What could I do?

cython

share|improve this question

edited Mar 21 at 19:33

David Buchaca

asked Mar 21 at 19:09

David BuchacaDavid Buchaca

1113

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  There is a lot of unnecessary code, if all you want to know is how to dynamically allocate cy_couples!
  
  – ead
  Mar 21 at 19:30
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Possible duplicate of Cython: creating an array throws "not allowed in a constant expression"
  
  – DavidW
  Mar 21 at 19:42
  

  
  
  
  

add a comment | 

I would like to know how can I create an array of structs in Cython that I can populate and make computations afterwards.

Example

Here I have the Cython code

%%cython 
cimport numpy as cnp
cimport cython


from collections import namedtuple

Couple = namedtuple('Couple', ['female', 'male'], verbose=False)

cdef struct CyCouple:
 int female
 int male


cpdef int np_cy_count_women_earning_more2(list py_couples):

 cdef:
 int count = 0, r, N
 CyCouple cy_couples[100_0000] # THIS IS HARDCODED

 N = len(py_couples)

 make_CyCouple_array(py_couples, cy_couples, N)

 for n in range(N):
 r = cy_couples[n].female > cy_couples[n].male
 count += r
 return count

I would like to have a general versions instead of the definition in # THIS IS HARDCODED.

What could I do?

cython

share|improve this question

edited Mar 21 at 19:33

David Buchaca

asked Mar 21 at 19:09

David BuchacaDavid Buchaca

1113

%%cython 
cimport numpy as cnp
cimport cython


from collections import namedtuple

Couple = namedtuple('Couple', ['female', 'male'], verbose=False)

cdef struct CyCouple:
 int female
 int male


cpdef int np_cy_count_women_earning_more2(list py_couples):

 cdef:
 int count = 0, r, N
 CyCouple cy_couples[100_0000] # THIS IS HARDCODED

 N = len(py_couples)

 make_CyCouple_array(py_couples, cy_couples, N)

 for n in range(N):
 r = cy_couples[n].female > cy_couples[n].male
 count += r
 return count

share|improve this question

edited Mar 21 at 19:33

David Buchaca

asked Mar 21 at 19:09

David BuchacaDavid Buchaca

1113

share|improve this question

edited Mar 21 at 19:33

David Buchaca

asked Mar 21 at 19:09

David BuchacaDavid Buchaca

1113

asked Mar 21 at 19:09

David BuchacaDavid Buchaca

1113

asked Mar 21 at 19:09

David BuchacaDavid Buchaca

1113