變更元素內容

1. 將字典中用戶 dywang 的 uid 由 1000 改為 1002。

   [dywang@deyu zzz]$ cat dict3.py
   #!/usr/bin/python3
   # coding: utf-8
   
   uid = { 'dywang':1000, 'david':2346, 'linda':1324 }
   print("uid[%s] = %d" %('dywang', uid['dywang']))
   uid['dywang'] = 1002
   print("uid[%s] = %d" %('dywang', uid['dywang']))
   

2. 執行結果：用戶 dywang 的 uid 由 1000 改為 1002。

   [dywang@dywIssd zzz]$ ./dict3.py 
   uid[dywang] = 1000
   uid[dywang] = 1002