CSC111 List of Tuples Demo

--D. Thiebaut (talk) 09:58, 12 April 2015 (EDT)

---

# Lab11Demo.py
# D. Thiebaut
# Demonstration Program for processing
# lists presented in textual information, and creating
# a list of tuples from the different lines.
# The list of tuples can easily be sorted in increasing or decreasing
# order, once the information is split into fields and made into
# a list of tuples.
# This program uses a list of countries and the Internet speed available for its citizens. 
# This information is reported in Wikipedia.  We use this list that has been artificially 
# shuffled to get the alphabetical listing by country name, the top-10 countries by fastest
# Internet access, and the lowest 10 countries by slowest access.


# The list from Wikipedia is copy/pasted in a string called text.
# http://en.wikipedia.org/wiki/List_of_countries_by_Internet_connection_speeds
text = """	 Canada	10.3
  Switzerland	14.5
	 Uruguay	5.5
	 Taiwan	9.5
	 Romania	11.3
	 Brazil	2.9
	 Germany	8.7
	 Russia	9.1
	 Bolivia	1.1
	 Venezuela	1.3
	 Israel	11.4
	 Indonesia	3.7
 Ireland	13.9
	 New Zealand	7.0
	 India	2.0
	 South Africa	3.6
	 United Arab Emirates	4.7
	 Portugal	8.0
	 Denmark	11.2
	 Austria	10.4
	 Australia	6.9
	 Norway	11.4
	 Finland	11.7
	 Panama	2.9
	 France	6.9
	 China	3.8
 Japan	15.0
 Czech Republic	12.3
	 Paraguay	1.3
	 Argentina	4.2
	 Costa Rica	2.7
	 Chile	4.1
	 Slovakia	8.6
	 Turkey	5.5
	 Belgium	11.4
 Netherlands	14.0
	 Italy	5.5
 Singapore	12.2
	 United States	11.5
	 Mexico	4.1
 Sweden	14.1
	 United Kingdom	10.7
	 Hungary	8.8
	 Colombia	3.4
	 Spain	7.8
	 Peru	3.6
 South Korea	25.3
	 Ecuador	3.6
	 Vietnam	2.5
	 Thailand	6.6
	 Poland	8.6
 Hong Kong	16.3
	 Malaysia	4.1
	 Philippines	2.5"""


def main():
    # =========================================================
    # print the list by countries, alphabetically
    # =========================================================
    print( "\n\n=== ALPHABETICAL LISTING ===" )
    
    # prepare an empty list
    list = []

    # split the text into lines...
    for line in text.split( "\n" ):

        # split each line into words
        fields = line.split()

        # skip lines that do not have at least 2 fields
        if len( fields ) < 2:
            continue

        # create a tuple with country name and speed, sorted alphabetically
        country = " ".join( fields[0:-1] )
        speed = float( fields[-1] )
        tuple =( country, speed )

        # add tupple to list
        list.append( tuple )

        
    # loop over.  Sort it alphabetically
    list.sort()

    # display the countries alphabetically
    for country, speed in list:
        print( "{0:20} {1:4.1f}".format( country, speed ) )

    # =========================================================
    # print the list by speed, top 10 only
    # =========================================================
    print( "\n\n=== TOP-10 BY SPEED ===" )

    list2 = []
    for country, speed in list:
        tuple = (speed, country )
        list2.append( tuple )

    # sort by speed (since it's the first item in the tuples)
    list2.sort()

    # sort in decreasing order by reversing
    list2.reverse()

    for i in range( min( len( list2), 10 ) ):
        speed, country = list2[i]
        print( "{0:20} {1:4.1f}".format( country, speed ) )


    # =========================================================
    # print the list by speed, lowest 10 only
    # =========================================================
    print( "\n\n=== LAST-10 BY SPEED ===" )

    list2 = []
    for country, speed in list:
        tuple = (speed, country )
        list2.append( tuple )

    # sort by speed (since it's the first item in the tuples)
    list2.sort()

    for i in range( min( len( list2), 10 ) ):
        speed, country = list2[i]
        print( "{0:20} {1:4.1f}".format( country, speed ) )

main()