[Solved] Python create list combination

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You haven’t specified in what order the keys of the dictionary should be processed in the output. If one assumes reverse sorting order, you can do this trivially with itertools.product():

from itertools import product

combinations = product(*(['{0}{1}'.format(v, i) for i in range(dictElement[v])] 
                         for v in sorted(dictElement, reverse=True))

Demo:

>>> from itertools import product
>>> dictElement = {"PA":2,"PB":2,"PC":3}
>>> combinations = product(*(['{0}{1}'.format(v, i) for i in range(dictElement[v])]
...                           for v in sorted(dictElement, reverse=True)))
>>> for combo in combinations:
...     print(combo)
...
('PC0', 'PB0', 'PA0')
('PC0', 'PB0', 'PA1')
('PC0', 'PB1', 'PA0')
('PC0', 'PB1', 'PA1')
('PC1', 'PB0', 'PA0')
('PC1', 'PB0', 'PA1')
('PC1', 'PB1', 'PA0')
('PC1', 'PB1', 'PA1')
('PC2', 'PB0', 'PA0')
('PC2', 'PB0', 'PA1')
('PC2', 'PB1', 'PA0')
('PC2', 'PB1', 'PA1')

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solved Python create list combination