在Python中保存变量

Question

我的问题是关于在Python中保存变量的值。更具体地说，我有两种不同的脚本，用两种不同的方式计算相同的东西。我想要做的是比较两个脚本返回的变量的值。所以我想知道是否我可以运行第一个脚本，保存其中一个变量的值（比方说矩阵V），然后运行第二个脚本并比较第二个脚本计算的相同变量的值。

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Answer 1

就像@claymore说的意见，这可以用泡菜来完成。您将您想要的变量存储到pickle中，然后从比较脚本中获取pickle对象。

下面是一个例子

script_a.py

# Save a dictionary into a pickle file. 
import pickle 

def funca(): 
    favorite_color = { "lion": "yellow", "kitty": "red" } 
    with open("a.pickle","wb") as f: 
     pickle.dump(favorite_color, f) 

funca() 

script_b.py

# Save a dictionary into a pickle file. 
import pickle 

def funcb(): 
    favorite_color = { "lion": "blue", "kitty": "orange" } 
    with open("b.pickle","wb") as f: 
     pickle.dump(favorite_color, f) 

funcb() 

compare.py

# Load the dictionary back from the pickle file. 
import pickle 
import os 

os.system("python script_a.py") 
os.system("python script_b.py") 

a_fav = pickle.load(open("a.pickle", "rb")) 
b_fav = pickle.load(open("b.pickle", "rb")) 

print "script 1 had favorite = ", a_fav 
print "script 2 had favorite = ", b_fav 

来源：https://wiki.python.org/moin/UsingPickle