问如何删除Geopandas数据框架中的列索引？

EN

import pandas as pd
from pathlib import Path
import geopandas as gpd

# https://api.worldbank.org/v2/en/indicator/EN.ATM.CO2E.KT?downloadformat=csv
f = Path.home().joinpath(
    "Downloads/API_EN/API_EN.ATM.CO2E.KT_DS2_en_csv_v2_3888754.csv"
)
df = pd.read_csv(f, skiprows=3)
world = gpd.read_file(gpd.datasets.get_path("naturalearth_lowres"))

# join data and geometry
gdf = gpd.GeoDataFrame(df.merge(world, left_on="Country Code", right_on="iso_a3"))

# now generate a choropleth
gdf.loc[
    :, ["Country Name", "Country Code", "Indicator Name", "2018", "geometry"]
].explore(
    column="2018",
    vmin=gdf["2018"].quantile(0.25),
    vmax=gdf["2018"].quantile(0.9),
    height=300,
    width=500,
)