Removed the initialize argument

[AlbertLee125]

The bigM has the initialize argument
resulting me to initialize a Suffix with an integer value, which is not iterable.
I tried to resolve the issue BigM: TypeError: 'int' object is not iterable #31 by removing the initialize parameter.

#31

[ZedongPeng]

Removing the initial value for bigM might not be a good option. Can we try something else? @AlbertLee125

[AlbertLee125]

m.bigM = Suffix(direction=Suffix.LOCAL, initialize=7000)

The initial parameter for a Suffix object in Pyomo expects a dictionary or a callable (such as a function) that maps components to values. It does not accept a single integer value.
It would be better to remove or modify the benchmark.py.

TransformationFactory('gdp.bigm').apply_to(m, bigM=7000)

[bernalde]

Please check how the BigM parameter is initialized in the examples from the Pyomo repo and implement it that way.
Also, make sure that the tests pass before requesting for review

[ZedongPeng]

The example to set values for BigM is here.
https://github.com/Pyomo/pyomo/blob/c783037f1439e2bd404574e8d76a6c15aab07aa7/pyomo/gdp/tests/test_bigm.py#L362-L367