Python字典的推导式_Python自学第二十八节

>>> a = 'I Love Python,and I Love Linux too'
>>> {i:a.count(i) for i in a}
{'I': 2, ' ': 6, 'L': 3, 'o': 5, 'v': 2, 'e': 2, 'P': 1, 'y': 1, 't': 2, 'h':

>>> a = ['ftp','ssh','http']
>>> b = [21,22,80]
>>> {i:j for i,j in zip(a,b)}
{'ftp': 21, 'ssh': 22, 'http': 80}
>>>