import yt
ds = yt.load('IsolatedGalaxy/galaxy0030/galaxy0030')
ds.index
<yt.frontends.enzo.data_structures.EnzoHierarchy at 0x10e802290>
index = ds.index
print index.grids
[EnzoGrid_0001 EnzoGrid_0002 EnzoGrid_0003 EnzoGrid_0004 EnzoGrid_0005 EnzoGrid_0006 EnzoGrid_0007 EnzoGrid_0008 EnzoGrid_0009 EnzoGrid_0010 EnzoGrid_0011 EnzoGrid_0012 EnzoGrid_0013 EnzoGrid_0014 EnzoGrid_0015 EnzoGrid_0016 EnzoGrid_0017 EnzoGrid_0018 EnzoGrid_0019 EnzoGrid_0020 EnzoGrid_0021 EnzoGrid_0022 EnzoGrid_0023 EnzoGrid_0024 EnzoGrid_0025 EnzoGrid_0026 EnzoGrid_0027 EnzoGrid_0028 EnzoGrid_0029 EnzoGrid_0030 EnzoGrid_0031 EnzoGrid_0032 EnzoGrid_0033 EnzoGrid_0034 EnzoGrid_0035 EnzoGrid_0036 EnzoGrid_0037 EnzoGrid_0038 EnzoGrid_0039 EnzoGrid_0040 EnzoGrid_0041 EnzoGrid_0042 EnzoGrid_0043 EnzoGrid_0044 EnzoGrid_0045 EnzoGrid_0046 EnzoGrid_0047 EnzoGrid_0048 EnzoGrid_0049 EnzoGrid_0050 EnzoGrid_0051 EnzoGrid_0052 EnzoGrid_0053 EnzoGrid_0054 EnzoGrid_0055 EnzoGrid_0056 EnzoGrid_0057 EnzoGrid_0058 EnzoGrid_0059 EnzoGrid_0060 EnzoGrid_0061 EnzoGrid_0062 EnzoGrid_0063 EnzoGrid_0064 EnzoGrid_0065 EnzoGrid_0066 EnzoGrid_0067 EnzoGrid_0068 EnzoGrid_0069 EnzoGrid_0070 EnzoGrid_0071 EnzoGrid_0072 EnzoGrid_0073 EnzoGrid_0074 EnzoGrid_0075 EnzoGrid_0076 EnzoGrid_0077 EnzoGrid_0078 EnzoGrid_0079 EnzoGrid_0080 EnzoGrid_0081 EnzoGrid_0082 EnzoGrid_0083 EnzoGrid_0084 EnzoGrid_0085 EnzoGrid_0086 EnzoGrid_0087 EnzoGrid_0088 EnzoGrid_0089 EnzoGrid_0090 EnzoGrid_0091 EnzoGrid_0092 EnzoGrid_0093 EnzoGrid_0094 EnzoGrid_0095 EnzoGrid_0096 EnzoGrid_0097 EnzoGrid_0098 EnzoGrid_0099 EnzoGrid_0100 EnzoGrid_0101 EnzoGrid_0102 EnzoGrid_0103 EnzoGrid_0104 EnzoGrid_0105 EnzoGrid_0106 EnzoGrid_0107 EnzoGrid_0108 EnzoGrid_0109 EnzoGrid_0110 EnzoGrid_0111 EnzoGrid_0112 EnzoGrid_0113 EnzoGrid_0114 EnzoGrid_0115 EnzoGrid_0116 EnzoGrid_0117 EnzoGrid_0118 EnzoGrid_0119 EnzoGrid_0120 EnzoGrid_0121 EnzoGrid_0122 EnzoGrid_0123 EnzoGrid_0124 EnzoGrid_0125 EnzoGrid_0126 EnzoGrid_0127 EnzoGrid_0128 EnzoGrid_0129 EnzoGrid_0130 EnzoGrid_0131 EnzoGrid_0132 EnzoGrid_0133 EnzoGrid_0134 EnzoGrid_0135 EnzoGrid_0136 EnzoGrid_0137 EnzoGrid_0138 EnzoGrid_0139 EnzoGrid_0140 EnzoGrid_0141 EnzoGrid_0142 EnzoGrid_0143 EnzoGrid_0144 EnzoGrid_0145 EnzoGrid_0146 EnzoGrid_0147 EnzoGrid_0148 EnzoGrid_0149 EnzoGrid_0150 EnzoGrid_0151 EnzoGrid_0152 EnzoGrid_0153 EnzoGrid_0154 EnzoGrid_0155 EnzoGrid_0156 EnzoGrid_0157 EnzoGrid_0158 EnzoGrid_0159 EnzoGrid_0160 EnzoGrid_0161 EnzoGrid_0162 EnzoGrid_0163 EnzoGrid_0164 EnzoGrid_0165 EnzoGrid_0166 EnzoGrid_0167 EnzoGrid_0168 EnzoGrid_0169 EnzoGrid_0170 EnzoGrid_0171 EnzoGrid_0172 EnzoGrid_0173]
print index.grid_levels.T
[[0 1 1 1 1 1 1 1 1 2 3 4 5 5 5 5 5 5 5 6 6 6 7 7 7 7 7 8 2 3 4 5 5 5 5 5 5 5 5 5 5 5 5 6 7 7 8 8 8 8 8 8 8 8 8 2 3 4 5 5 5 5 5 5 5 5 5 5 5 6 6 6 7 7 7 8 8 2 3 4 4 5 5 6 7 7 7 8 8 8 8 8 8 2 3 4 5 6 7 8 8 8 8 8 8 2 3 4 5 6 6 7 7 7 8 8 8 8 8 2 3 4 4 4 4 4 4 4 5 5 5 5 5 5 6 7 7 7 7 7 7 7 8 8 2 3 4 5 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 7 7 7 7 8 8 8 8 8]]
grids_below_level_5 = (index.grid_levels < 5).T[0]
print index.grids[grids_below_level_5]
[EnzoGrid_0001 EnzoGrid_0002 EnzoGrid_0003 EnzoGrid_0004 EnzoGrid_0005 EnzoGrid_0006 EnzoGrid_0007 EnzoGrid_0008 EnzoGrid_0009 EnzoGrid_0010 EnzoGrid_0011 EnzoGrid_0012 EnzoGrid_0029 EnzoGrid_0030 EnzoGrid_0031 EnzoGrid_0056 EnzoGrid_0057 EnzoGrid_0058 EnzoGrid_0078 EnzoGrid_0079 EnzoGrid_0080 EnzoGrid_0081 EnzoGrid_0094 EnzoGrid_0095 EnzoGrid_0096 EnzoGrid_0106 EnzoGrid_0107 EnzoGrid_0108 EnzoGrid_0120 EnzoGrid_0121 EnzoGrid_0122 EnzoGrid_0123 EnzoGrid_0124 EnzoGrid_0125 EnzoGrid_0126 EnzoGrid_0127 EnzoGrid_0128 EnzoGrid_0145 EnzoGrid_0146 EnzoGrid_0147]
grid = index.grids[0]
grid_density = grid['density']
print grid_density.shape
print grid_density[0,]
(32, 32, 32) [[ 4.92775131e-31 4.94005215e-31 4.93824707e-31 ..., 4.93823719e-31 4.94004510e-31 4.92774426e-31] [ 4.94005168e-31 4.95397800e-31 4.95299435e-31 ..., 4.95299059e-31 4.95397283e-31 4.94004839e-31] [ 4.93824613e-31 4.95299529e-31 4.95191054e-31 ..., 4.95190302e-31 4.95298965e-31 4.93824001e-31] ..., [ 4.93824048e-31 4.95299153e-31 4.95190396e-31 ..., 4.95189973e-31 4.95298541e-31 4.93823531e-31] [ 4.94004698e-31 4.95397330e-31 4.95299106e-31 ..., 4.95298494e-31 4.95397001e-31 4.94004275e-31] [ 4.92774661e-31 4.94005121e-31 4.93824424e-31 ..., 4.93823484e-31 4.94004181e-31 4.92773815e-31]] g/cm**3