我有一个字典,里面填充了我导入的两个文件的数据,但有些数据是以nan形式出现的.如何使用nan删除数据？
我的代码是:
import matplotlib.pyplot as plt
from pandas.lib import Timestamp
import numpy as np
from datetime import datetime
import pandas as pd
import collections
orangebook = pd.read_csv('C:\Users\WEGWEIS_JAKE\Desktop\Work Programs\Code Files\products2.txt',sep='~', parse_dates=['Approval_Date'])
specificdrugs=pd.read_csv('C:\Users\WEGWEIS_JAKE\Desktop\Work Programs\Code Files\Drugs.txt',sep=',')
"""This is a dictionary that collects data from the .txt file
This dictionary has a key,value pair for every generic name with its corresponding approval date """
drugdict={}
for d in specificdrugs['Generic Name']:
drugdict.dropna()
drugdict[d]=orangebook[orangebook.Ingredient==d.upper()]['Approval_Date'].min()
我应该添加或删除此代码以确保字典中没有值为nan的键值对？