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Python 字典存储为文件并读取

'''
Python 字典存储为文件并读取 by 郑瑞国
'''
data = {1:'a',2:'b',3:'c'}
f = open('data.txt','w')
f.write(str(data))
f.close()
f = open('data.txt','r')
data2 = f.read()
data3 = eval(data2)
print(data3)