关于字典推导式的一些案例：
'''
# 字典推导式
p ={i:str(i)for i in range(1,5)}
print("p:",p)
'''
p: {1: '1', 2: '2', 3: '3', 4: '4'}
'''
x =['A','B','C','D']
y =['a','b','c','d']
n ={i:j for i,j in zip(x,y)}
print("n:",n)
'''
n: {'A': 'a', 'B': 'b', 'C': 'c', 'D': 'd'}
'''
s ={x:x.strip()for x in('he','she','I')}
print("s:",s)
'''
s: {'he': 'he', 'she': 'she', 'I': 'I'}
'''
