Update README.md

README.md

@@ -14,7 +14,7 @@ https://github.com/BDuenweg/Lattice-Boltzmann-weights
     
 ## Usage:
 ``` Python
-from lattice import Lattice
+from lbmweights import Lattice
 lattice = Lattice(dimension=2, order=4, shell_list=[1,2,4])
 weights = lattice.calculate_weights()
 ```
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