How to extract tweets location which contain specific keyword using twitter API in Python

I am trying to extract the all tweets which contain specific keyword and its geo locations .

for example , I want download all the tweets in english which contains the keyword 'iphone' from 'france' and 'singapore'

My code

import tweepy
import csv
import pandas as pd
import sys

# API credentials here
consumer_key = 'INSERT CONSUMER KEY HERE'
consumer_secret = 'INSERT CONSUMER SECRET HERE'
access_token = 'INSERT ACCESS TOKEN HERE'
access_token_secret = 'INSERT ACCESS TOKEN SECRET HERE'

auth = tweepy.OAuthHandler(consumer_key, consumer_secret)
auth.set_access_token(access_token, access_token_secret)
api = tweepy.API(auth,wait_on_rate_limit=True,wait_on_rate_limit_notify=True)

# Search word/hashtag value 
HashValue = ""

# search start date value. the search will start from this date to the current date.
StartDate = ""

# getting the search word/hashtag and date range from user
HashValue = input("Enter the hashtag you want the tweets to be downloaded for: ")
StartDate = input("Enter the start date in this format yyyy-mm-dd: ")

# Open/Create a file to append data
csvFile = open(HashValue+'.csv', 'a')

#Use csv Writer
csvWriter = csv.writer(csvFile)

for tweet in tweepy.Cursor(api.search,q=HashValue,count=20,lang="en",since=StartDate, tweet_mode='extended').items():
    print (tweet.created_at, tweet.full_text)
    csvWriter.writerow([tweet.created_at, tweet.full_text.encode('utf-8')])

print ("Scraping finished and saved to "+HashValue+".csv")
#sys.exit()

How can this be done.

from How to extract tweets location which contain specific keyword using twitter API in Python