Python_二維數組

  • 2020 年 1 月 19 日
  • 筆記

例1:將數組旋轉90度

 1 a = [[i for i in range(4)] for n in range(4)]   2 print(a)   3 # 遍歷大序列   4 for a_index, w in enumerate(a):            # enumaerate()遍曆數據對象,同時列出數據和數據下標   5      # 遍歷大序列里的小序列   6     for m_index in range(a_index, len(w)):    # range(w_index, )使for循環從w_index行開始替換   7         tmp = a[m_index][a_index]      # 將大序列里的值存起來   8         a[m_index][a_index] = w[a_index]          # 將小序列的值放到大序列   9         a[a_index][m_index] = tmp            #將存起來的值放到小序列里  10     print('----------------')  11     for r in a:                         #查看轉換過程  12         print(r)

rotating

結果:

[[0, 1, 2, 3], [0, 1, 2, 3], [0, 1, 2, 3], [0, 1, 2, 3]]  ----------------  [0, 0, 0, 0]  [0, 1, 2, 3]  [0, 1, 2, 3]  [0, 1, 2, 3]  ----------------  [0, 0, 0, 0]  [0, 1, 1, 1]  [0, 1, 2, 3]  [0, 1, 2, 3]  ----------------  [0, 0, 0, 0]  [0, 1, 1, 1]  [0, 1, 2, 2]  [0, 1, 2, 3]  ----------------  [0, 0, 0, 0]  [0, 1, 1, 1]  [0, 1, 2, 2]  [0, 1, 2, 3]

View Code