【python数组和数组字典】

# test.py
 
if __name__ == "__main__":
 
    # 二维数组
    arr = [[1,2,3,4,5],[2,3,4,5,6]]  
    # 字典
    dict = {'a':'b','b':'c'}         
    # 数组字典
    dict2 = {                        
        'a':{'a':['a','b','c']},
        'b':['b','c','d'],
        }  
 
    for j in range(0,5):
        print(j);                   
        # 0-4
    
    for j in range(len(arr)):       
        # 2
        print(arr[0][j])            
        # 1,2
    
    for j in range(1,len(arr)):     
        # 1-2
        print(arr[0][j])                
        # 2
 
    for k,v in enumerate(arr[0]):
        print(k,v)                  
        # 0 1...4 5
    
    for row in arr:
        print(row)
        a,b,c,d,e = row
        print(a,b,c,d,e)
    
    for key in dict.keys():
        print(key,dict[key])
    
    for k,v in dict.items():
        print(k,v)                  
        # a b,b c
 
    print(dict2['a']['a'])          
    # 'a','b','c'
    
    # 定义10个数组字典
    dict3 = {}                      
    for k in range(10):
        dict3[k] = {}
        dict3[k]['aa'] = 'bb'
    print(dict3)