将字典的键转换为字符串

Question

I think that the problem of my code is that each time the loop in iterating on a new variable, the previous variable is not deleted. So I end up with plot that contains all the previous data coming from the previous iterations. What I may need is a function to clear up the memory at the end of each loop... The reason while I originally asked this question, was that I run the same loop over and over and I end up having to many data on my plot (since it seems like the data are not clear at the end of each iteration).

dicohist = {
'couts-formels': dftotal.total_cout_formels,
'couts_direct': dftotal.cout_total,
'perte-de-prod': dftotal.snt_prix
}

for key in dicohist:
    histo = Series.hist(dicohist[key],bins=50)  
    histo.set_xlabel("cout en euros")
    histo.set_ylabel("nombre de sujets")
    histo.set_title(key)
    fig = histo.get_figure()
    fig.savefig('/Users/Salim/Desktop/plot/%s.png'%(key))   

Answer 1

我在循环结束时添加了一个 pyplot 函数：plt.close() 解决了问题