[Python] save variables locally and read them

In use jupyter notebook Write python A lot of variables are generated in the process of code , And when it's closed or restart jupyter kernel Then all variables disappear , To see the variables, you have to run the code again , And want to be in another jupyter notebook It is even more troublesome to call variables in . Saving variables in long running code can save a lot of things .

Let's start ！

The bag I use is pickle

1. You need to import the package before using it ：

import pickle

2. After importing the package, you can start substantive operations , We define functions that hold and read variables .

Save variable functions ：

def save_variable(v,filename):
f=open(filename,'wb')
pickle.dump(v,f)
f.close()
return filename

Read variable function ：

def load_variavle(filename):
f=open(filename,'rb')
r=pickle.load(f)
f.close()
return r

3. Save variables and read variable operations .

Save variables ： Put the variable results Save in results.txt In file .

filename = save_variable(results, 'results.txt')

Read variables ： from results.txt Read the variable content to results .

results = load_variavle('results.txt')

Finally put the code together , Use which paragraph you want to use .

import pickle
def save_variable(v,filename):
f=open(filename,'wb')
pickle.dump(v,f)
f.close()
return filename
def load_variavle(filename):
f=open(filename,'rb')
r=pickle.load(f)
f.close()
return r
filename = save_variable(results,'results.txt')
results = load_variavle('results.txt')