Now create a function buildPanelData that takes a date range a list of countries and a list of indicators, returning a single dataFrame with columns for each indicator. Use the buildCountryData as a building block $($i$.$e$.,$ just concat the dataframes you created above.

$[]$ Start coding or generate with AI$.$

$```$

$[]$ country$\_$list $=[$

"AFG", # A $-$ Afghanistan

"BRA", # B $-$ Brazil

"CAN", # C $-$ Canada

"DEU", # D $-$ Germany $($Deutschland$)$

"EGY", # E $-$ Egypt

"FRA", # F $-$ France

"GHA", # G $-$ Ghana

$"$HND$",$ # H $-$ Honduras

"IND", # I $-$ India

$"$JPN$",$ # J $-$ Japan

"KEN", # K $-$ Kenya

"LKA", # L $-$ Sri Lanka

"MEX", # M $-$ Mexico

"NGA", # N $-$ Nigeria

"OMN", # O $-$ Oman

"PAK", # P $-$ Pakistan

"QAT", # Q $-$ Qatar

"RUS", # R $-$ Russia

$"$SGP$",$ # S $-$ Singapore

"TUR", # T $-$ Turkey

"UGA", # U $-$ Uganda

$"$VNM$",$ # V $-$ Vietnam

$"$WSM$",$ # W $-$ Samoa

"YEM", # Y $-$ Yemen

"ZAF", # Z $-$ South Africa

$]$

$```$

Use the above function to create a df panel for

$-$ the indicators in the dict indicator$\_$dict

$-$ the countries in country$\_$list

$-$ the years $1980$ to $2020$