pickle是幹嘛的、為啥要用pickle：

• 可以將程式中執行的物件資訊儲存到檔案中去，永久儲存
• 讀寫速度比較快
• 支援格式多

整段程式碼

import pickle

a = [1,2,3,4,5]
print('a = {}'.format(a))

# 將a序列化並寫入'cache.pkl'
with open('cache.pkl', 'wb') as outf:
	pickle.dump(a, outf)
	
# 讀取'cache.pkl'資料、反序列化並存入b
with open('cache.pkl', 'rb') as inf:
	b = pickle.load(inf)

print('b = {}'.format(b))
 

執行結果

a = [1, 2, 3, 4, 5]
b = [1, 2, 3, 4, 5]