get city and it's country's population via wiki
give city's population, the country it belongs to and the country's population. Data source is from wiki
python 2
pandas
beautifulsoup4
install pandas and beautifulsoup4 if you don't have them in your python environment
pip install pandas
pip install beautifulsoup4
set CITY_LIST_FILE point to your city_list.txt file
set OUTPUT_FILE point to where you want to output result
run python fetch_city.py