1.常規建立字典

In [1]: dict1 = {'a':1, 'b':2, 'c':3}

In [2]: print(dict1)
Out[2]: {'a': 1, 'b': 2, 'c': 3}

2. 利用zip函式和 dict函式建立字典

In [3]: list1 = ['a', 'b', 'c']; list2 = [1, 2, 3]; dict1 = dict(zip(list1, list2))

In [4]: print(dict1)
Out[4]: {'a': 1, 'b': 2, 'c': 3}

3. 動態新增建立字典

In [5]: dict1={}

In [6]: dict1['a'] = 1

In [7]: dict1
Out[7]: {'a': 1}

In [8]: dict1['b'] = 2; dict1['c'] = 3

In [9]: dict1
Out[9]: {'a': 1, 'b': 2, 'c': 3}
 

4. 利用dict.fromkeys()函式建立字典

# 此方法適合字典中各鍵的值都相同, [1,2]是初始化各鍵的值,　可以是數字字母等等 
In [10]: dict1 = dict.fromkeys(['a','b', 'c'], [1,2])

Out[11]: dict1
Out[11]: {'a': [1,2], 'b': [1,2], 'c': [1,2]}

# fromkeys函式不輸入引數時
In [12]: dict1 = dict.fromkeys(['a','b', 'c'])

Out[13]: dict1
Out[13]: {'a': None, 'b': None, 'c': None}