def __init__(self, header, hlen=None, hdata=None):
        self.header = header
        self.hlen = hlen
        self.hdata = hdata
Returns a list of all defined environments.
dataset/ETHPy150Open nskinkel/oppy/oppy/cell/fixedlen.py/Created2Cell.__init__--crossover with--dataset/ETHPy150Open rackspace/pyrax/pyrax/__init__.py/list_environments