The MOSEK Python optimizer API manual Version 7.0 (Revision 141)

32 CHAPTER 5. BASIC API TUTORIAL
5.2.2 Row-wise input
In the previous example the A matrix is set one column at a time. Alternatively the same matrix can
be set one row at a time or the two methods can be mixed as in the example in section 5.10. The
following example show how to set the A matrix by rows.
1 #
[ lo2.py ]
2 # Copyright: Copyright (c) MOSEK ApS, Denmark. All rights reserved.
3 #
4 # File: lo2.py
5 #
6 # Purpose: Demonstrates how to solve small linear
7 # optimization problem using the MOSEK Python API.
8 ##
9
10 import sys
11
12 import mosek
13 # If numpy is installed, use that, otherwise use the
14 # Mosek’s array module.
15 try:
16 from numpy import array,zeros,ones
17 except ImportError:
18 from mosek.array import array, zeros, ones
19
20 # Since the actual value of Infinity is ignores, we define it solely
21 # for symbolic purposes:
22 inf = 0.0
23
24 # Define a stream printer to grab output from MOSEK
25 def streamprinter(text):
26 sys.stdout.write(text)
27 sys.stdout.flush()
28
29 # We might write everything directly as a script, but it looks nicer
30 # to create a function.
31 def main ():
32 # Make a MOSEK environment
33 env = mosek.Env ()
34 # Attach a printer to the environment
35 env.set Stream (mosek.streamtype.log, streamprinter)
36
37 # Create a task
38 task = env.Task(0,0)
39 # Attach a printer to the task
40 task.set Stream (mosek.streamtype.log, streamprinter)
41
42 # Bound keys for constraints
43 bkc = [mosek.boundkey.fx,
44 mosek.boundkey.lo,
45 mosek.boundkey.up]
46 # Bound values for constraints
47 blc = [30.0, 15.0, -inf]
48 buc = [30.0, +inf, 25.0]
49 # Bound keys for variables
50 bkx = [mosek.boundkey.lo,