This is how I would do it. Replace "name" and "post" with the actual column names from your CSV

import pandas as pd
import requests

# read the data CSV
# you have to replace "name" and "post" with the actual column names
df = pd.read_csv("data.csv", usecols=["name", "post"])

# define the request URL
url = "https://wxs.ign.fr/essentiels/geoportail/geocodage/rest/0.1/search"

#api call for each element
for i in range(len(df["name"])):
    # prepare the name for URL
    genName = df["name"][i].replace(" ", "%20")
    print(genName)
    # prepare request
    request = url + "?q=" + genName + "&index=poi&limit=1&returntruegeometry=false&postcode=" + str(df["post"][i])
    print(request)

    # do the request
    r = requests.get(request)
    # response
    result = r.text
    print(result)