📅  最后修改于: 2022-03-11 14:46:58.328000             🧑  作者: Mango
text = "X-DSPAM-Confidence: 0.8475";
a= text.find(':')
b= text.find('5')
c= text[a+1:b+1]
d= float(c.lstrip())
print(d)