def validate_non_whitespace_only_string(value):
    if not value or not value.strip():
        raise forms.ValidationError(u'This field is required', code='required')
Gets the unspent outputs available for the transaction.
dataset/ETHPy150Open django-de/djangosnippets.org/cab/cab/forms.py/validate_non_whitespace_only_string--crossover with--dataset/ETHPy150Open OpenAssets/openassets/openassets/transactions.py/TransferParameters.unspent_outputs