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aa1 = '1一'
aa2 = '2二'
aa3 = '3三'
a1 = aa1[1]
a2 = aa2[1]
a3 = aa3[1]
print(aa1[0], aa2[0], aa3[0])
print(aa1[1], aa2[1], aa3[1])
print(id(a1), id(a2), id(a3))
print('====================================')
print(id(aa1[0]), id(aa2[0]), id(aa3[0]))
print(id(aa1[1]), id(aa2[1]), id(aa3[1]))
print('====================================')
a = 'h'
b = 'h'
print(id(a), id(b)) # 32762024 32762024
# 再看
a = 'hello'
b = 'world'
# 字符 o 在内存中只有一份
print(id(a[4]), id(b[1])) # 32760752 32760752