result

example output:
      fun: -2.0
 message: 'Optimization terminated successfully.'
     nit: 6
   slack: array([ 0.,  2.,  0.,  0.,  0.,  0.,  0.,  0.,  0.])
  status: 0
 success: True
       x: array([ 0.,  1.,  1.,  0.,  0.,  1.,  0.,  0.,  0.])
Traceback (most recent call last):
  File "assignment5.py", line 124, in <module>
    main()
  File "assignment5.py", line 109, in main
    print(max_flow(c, s, t))
  File "assignment5.py", line 51, in max_flow
    opt = linprog(c=c, A_eq=Aeq, b_eq=beq, bounds=bounds)
  File "/usr/local/lib/python3.6/site-packages/scipy/optimize/_linprog.py", line 993, in linprog
    bounds=bounds, callback=callback, **options)
  File "/usr/local/lib/python3.6/site-packages/scipy/optimize/_linprog.py", line 710, in _linprog_simplex
    raise ValueError(message)
ValueError: Invalid input for linprog with method = 'simplex'.  Number of columns in A_eq must be equal to the size of c