直接在文档中输入变量当成csv

import sys

import pandas as pd
import matplotlib.pyplot as plt
from sqlalchemy import create_engine, MetaData, Table


data = """Entity,Code,Year,Air pollution (total) (deaths per 100,000),Indoor air pollution (deaths per 100,000),Outdoor particulate matter (deaths per 100,000),Outdoor ozone pollution (deaths per 100,000)
China,CHN,1990,184.4132044,107.9676631,56.10672095,35.26596634
China,CHN,1991,181.8007043,103.7580384,57.73257106,34.93007362"""

df = pd.read_csv(pd.compat.StringIO(data))
china_data = df[df['Code'] == 'CHN']
print(china_data)