Python3 列表，数组，矩阵的相互转换的方法示例

  import numpy as np  mylist = [[1, 2, 3], [4, 5, 6]] # 列表  print(type(mylist))  print(mylist, end='/n/n')   myarray = np.array(mylist) # 列表转数组  print(type(myarray))  print(myarray, end="/n/n")   mymatrix = np.mat(mylist) # 列表转矩阵  print(type(mymatrix))  print(mymatrix, end='/n/n')   MatToArray = np.array(mymatrix) # 矩阵转数组  print(type(MatToArray))  print(MatToArray, end='/n/n')   ArrayToMat = np.mat(myarray) # 数组转矩阵  print(type(ArrayToMat))  print(ArrayToMat, end='/n/n')   MatToList1 = mymatrix.tolist() # 矩阵转列表  print(type(MatToList1))  print(MatToList1)  MatToList2 = list(mymatrix) # 注意点1  print(type(MatToList2))  print(MatToList2, end='/n/n')   ArrayToList1 = myarray.tolist() # 矩阵转列表  print(type(ArrayToList1))  print(ArrayToList1)  ArrayToList2 = list(myarray) # 注意点2  print(type(ArrayToList2))  print(ArrayToList2)