# -*- coding: utf-8 -*-
"""
Created on Tue Oct 29 16:24:38 2019

@author: Sim
"""

country_code = {'korea': 82, 'us':1, 'china':86}
print(len(country_code))
print(country_code['korea'])
# print(country_code[1]) # 에러
print(country_code.keys())
print(country_code.values())
print(country_code.items())

x2 = dict()
x3 = dict(a=1, b=2, c=3)                   # {'a': 1, 'b': 2, 'c': 3}
x4 = dict([('d', 4), ('e', 5), ('f', 6)])  # {'d': 4, 'e': 5, 'f': 6}
x5 = dict([('a', 1)], b=2, c=3)            # {'a': 1, 'b': 2, 'c': 3}
x6 = dict({'a' : 1, 'b' : 2}, c=3)         # {'a': 1, 'b': 2, 'c': 3}

x3['c'] = 3
x3['d'] = 4
print(x3)
aa = x3.pop('a')
print(aa, x3)

dd = dict(a=[1], b=[3,4])
print(dd)
dd['a'].append(2)
print(dd)