A subtle oddity in Python 3.5 on Windows

[langit]

This is a very subtle problem, it only occurs for Python 3.5 on Windows.
First of all, solve() should invoke swiglpk.glp_simplex() and print out some messages.
Then this weird exception never happens on other combinations of platforms and Python versions.
To install pymprog to replicate this, just do: pip install pymprog

Python 3.5.0 (v3.5.0:374f501f4567, Sep 13 2015, 02:16:59) [MSC v.1900 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> from pymprog import *
>>> begin('t')
model('t') is the default model.
>>> maximize(15*x + 10*y, 'profit')
Max profit: 15 * x + 10 * y
>>> x <= 3
0 <= x <= 3 continuous
>>> y <= 4
0 <= y <= 4 continuous
>>> x + y <= 5
R1: x + y <= 5
>>> solve()
>>> sensitivity()

PyMathProg 1.0 Sensitivity Report Created: 2016/12/14 Wed 12:30PM
================================================================================
Variable            Activity   Dual.Value     Obj.Coef   Range.From   Range.Till
--------------------------------------------------------------------------------
 x                         3            5           15           10          inf
*y                         2            0           10            0           15
StopIteration

During handling of the above exception, another exception occurred:

SystemError: <built-in function delete_doubleArray> returned a result with an error set

During handling of the above exception, another exception occurred:

SystemError: <built-in function delete_intArray> returned a result with an error set

During handling of the above exception, another exception occurred:

SystemError: <built-in function delete_doubleArray> returned a result with an error set

During handling of the above exception, another exception occurred:

SystemError: <built-in function delete_doubleArray> returned a result with an error set

During handling of the above exception, another exception occurred:

SystemError: <built-in function delete_intArray> returned a result with an error set

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<pyshell#9>", line 1, in <module>
    sensitivity()
  File "<string>", line 10, in sensitivity
  File "C:\Users\phbs\AppData\Local\Programs\Python\Python35-32\lib\site-packages\pymprog.py", line 5580, in sensitivity
    me.sensit()
  File "C:\Users\phbs\AppData\Local\Programs\Python\Python35-32\lib\site-packages\pymprog.py", line 5574, in sensit
    me.coef_ranges()
  File "C:\Users\phbs\AppData\Local\Programs\Python\Python35-32\lib\site-packages\pymprog.py", line 5608, in coef_ranges
    for vals in me._viter(cols): print(fmt%vals)
SystemError: <built-in function delete_doubleArray> returned a result with an error set

[phantomas1234]

Hi, I am sorry, I overlooked this issue. I don't have a Windows machine unfortunately, so I can't try it. I tried to it on my mac but then this happened

In [1]: from pymprog import *
---------------------------------------------------------------------------
FileNotFoundError                         Traceback (most recent call last)
<ipython-input-1-99a5561cc5c9> in <module>()
----> 1 from pymprog import *

/Users/niso/Downloads/pymathprog/pymprog.py in <module>()
    352             print("'''", d, "''',\n", sep='')
    353 
--> 354 class LinkGLPK(type):
    355     '''this metaclass will add glpk functions related to a problem instance
    356 to a class that wraps such an instance. the instance will be stored in

/Users/niso/Downloads/pymathprog/pymprog.py in LinkGLPK()
    359     glpk_h = 'glpk-4.60/src/glpk.h'
    360     doc_dir = 'glpk-4.60/doc'
--> 361     _related = Extractor(glpk_h, doc_dir).lp_related()
    362 
    363     _related ={

/Users/niso/Downloads/pymathprog/pymprog.py in lp_related(me, silent)
    338 
    339     def lp_related(me, silent=False):
--> 340         funs = me.grep_funs(r'(glp_\w+)\s*\(\s*glp_prob\s*\*', 1)
    341         dod = me.grep_doc(funs)
    342 

/Users/niso/Downloads/pymathprog/pymprog.py in grep_funs(me, rex, i)
    114         rex = me.re.compile(rex)
    115         funs = []
--> 116         with open(me.glpk_h) as header:
    117             for line in header:
    118                 if "#ifdef GLP_UNDOC" in line:

FileNotFoundError: [Errno 2] No such file or directory: 'glpk-4.60/src/glpk.h'

I have glpk 4.61 installed. Would it be possible to not hardcode the version? GLPK versions in the swiglpk wheels will probably change over time.

[cdiener]

Seems to be fixed now.