53 lines
1.5 KiB
Python
53 lines
1.5 KiB
Python
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class MyMatrix:
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# Constructor - parameterized
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row = 0
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column = 0
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matrix = {}
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def __init__(self, list):
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self.row = len(list)
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self.column = len(list[0])
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test = len(list[0])
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for i in range(len(list)):
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if len(list[i]) != test:
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raise Exception('Not a matrix')
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dictionary = {}
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for i in range(self.column):
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for j in range(self.row):
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if (list[i][j] == 0):
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continue
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dictionary[i*self.column + j] = list[i][j]
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self.matrix = dictionary
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def __str__(self):
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for i in range((self.row) *(self.column)):
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if i % self.column == 0:
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print("| ",end="")
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if i in self.matrix:
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print(f"{self.matrix[i]} ",end="")
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else:
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print("0 ",end="")
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if i % self.column == self.column -1:
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print("|\n",end="")
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def __getitem__(self, packing):
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column2,row1 = packing
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if column2 > self.column or row1 > self.row:
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raise Exception('Outside of Bounds')
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if column2*self.column + row1 in self.matrix:
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return self.matrix[column2*self.column + row1]
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else:
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return 0
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m = [[3,0,-2,11],[0,0,9,0],[0,7,0,0],[0,0,0,-3]]
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object = MyMatrix(m)
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object.__str__()
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#Wir haben keine Lösung mitm[0][0]= 3, da __getitem__ nur ein Argument nimmt
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x = object[0,0]
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print(x)
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