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)