def marginals(year, cutoff, printout = True) :
# This is a simple analysis which prints out the list of marginals after each
# election. I.e. if you would like to know which seats were marginals going into
# 1997, modulo boundary changes, ask for the marginals after 1992. The analysis
# can be given a cutoff for what you would like to consider a marginal
if printout :
print
print '------------------------------------------------------------'
print 'Retreiving marginals below',cutoff+"%",'for',year
print '------------------------------------------------------------'
print
seats = []
for constituency in outputdatabase :
if constituency == "elections" : continue
# First, does it exist in the given year?
if not outputdatabase[constituency].has_key(year) :
continue
else :
thismargin = getmargin(constituency,year,outputdatabase)
if 100.0 * thismargin < float(cutoff):
seats.append((thismargin,constituency))
seats.sort()
if printout :
for seat in seats :
printmarginal(seat[1],year,outputdatabase)
if args.verbose :
niceprint(seat[1],outputdatabase,yeartoprint=year)
print
if printout :
print
print '------------------------------------------------------------'
print 'Finished printout of',len(seats),'marginals below',cutoff+"%",'for',year
print '------------------------------------------------------------'
print
return seats
def marginals_between(party1, party2, year, cutoff, printout = True) :
# This is a simple analysis which prints out the list of marginals after each
# election which party1 holds with respect to party2. I.e. if you would like to
# know which seats were Tory-Labour marginals (held by Tories) going into
# 1997, modulo boundary changes, ask for the marginals after 1992. The analysis
# can be given a cutoff for what you would like to consider a marginal
if printout :
print
print '------------------------------------------------------------'
print 'Retreiving',party1+'-'+party2,'marginals below',cutoff+"%",'for',year
print '------------------------------------------------------------'
print
seats = []
for constituency in outputdatabase :
if constituency == "elections" : continue
# First, does it exist in the given year?
if not outputdatabase[constituency].has_key(year) :
continue
else :
if not party1 == outputdatabase[constituency][year]["winner"]["party"] :
continue
if not party2 == outputdatabase[constituency][year]["second"]["party"] :
continue
thismargin = getmargin(constituency,year,outputdatabase)
if 100.0 * thismargin < float(cutoff):
seats.append((thismargin,constituency))
seats.sort()
if printout :
for seat in seats :
printmarginal(seat[1],year,outputdatabase)
if args.verbose :
niceprint(seat[1],outputdatabase,yeartoprint=year)
print
if printout :
print
print '------------------------------------------------------------'
print 'Finished printout of',len(seats),party1+'-'+party2,'marginals below',cutoff+"%",'for',year
print '------------------------------------------------------------'
print
return seats
def gainbyparty(party, year, former_year = -999, printout = True) :
# This analysis prints an ordered list of votes gained by a party in a given
# election, with respect to the previous election. Only seats contested in both
# elections are counted. At the end, a small printout is also made of the overall
# totals, and the relevance of these votes to the 2015 picture in the seats
#
# Get the previous election year
if printout :
print
print '--------------------------------------------------------------------------------------------------------------------------------------------------------'
print 'Starting printout of votes gained by',party,'in',year
print '--------------------------------------------------------------------------------------------------------------------------------------------------------'
print
#
if former_year == -999 :
former_year = str(outputdatabase["elections"][outputdatabase["elections"].index(int(year))-1])
year = str(year)
former_year = str(former_year)
if args.debug : print former_year, year
votegains = []
alsoin2015 = 0
totalvotegain = 0
votegainsin2015 = { "Labour" : [], "Conservative" : [], "Lib Dem" : []}
for constituency in outputdatabase :
if constituency == "elections" : continue
# Was it contested in both elections?
if not (outputdatabase[constituency].has_key(former_year) and \
outputdatabase[constituency].has_key(year) ) :
continue
# OK they did, carry on now
if args.debug :
niceprint(constituency,outputdatabase)
party_scores = []
# This loop works because a party only has one entry per seat per year
for election in [former_year,year] :
for result in possibleresults() :
if party == outputdatabase[constituency][election][result]["party"] :
party_scores.append(outputdatabase[constituency][election][result]["vote"])
if not len(party_scores) == 2 : continue
# The votes gaines
thisgain_abs = party_scores[1]-party_scores[0]
# The percentage majority at the previous election
thismajority = getmargin(constituency,year,outputdatabase)
formermajority = getmargin(constituency,former_year,outputdatabase)
votegains.append((thisgain_abs,thismajority,formermajority,constituency,
outputdatabase[constituency][year]["winner"]["party"],
outputdatabase[constituency][former_year]["winner"]["party"]))
totalvotegain += thisgain_abs
if outputdatabase[constituency].has_key('2015') :
alsoin2015 += 1
for winner2015 in ['Labour','Conservative','Lib Dem'] :
if outputdatabase[constituency]['2015']["winner"]["party"] in [winner2015] :
votegainsin2015[winner2015].append(thisgain_abs)
#
# Now print it out
#
votegains.sort()
if printout :
print '--------------------------------------------------------------------------------------------------------------------------------------------------------'
print "{:<35}".format("Constituency"), "{:^20}".format("Votes Gained"), "{:^20}".format(str(year)+" winner"), "{:^20}".format(str(year)+" majority"), "{:^20}".format(str(former_year)+" winner"), "{:^20}".format(str(former_year)+" majority")
print '--------------------------------------------------------------------------------------------------------------------------------------------------------'
for votegain in votegains :
print "{:40}".format(votegain[3]),"{:>8}".format(votegain[0]), "{:>21}".format(votegain[4]), "{:>19.2%}".format(votegain[1]), "{:>21}".format(votegain[5]), "{:>19.2%}".format(votegain[2])
#
print
print 'There were',len(votegains),'contituencies in common between the',year,'and',former_year,'elections'
print alsoin2015,'of these also existed in the 2015 election'
print 'The overall vote gain for',party,'in',year,"was",totalvotegain
for winner2015 in ['Labour','Conservative','Lib Dem'] :
print 'The overall vote gain in the',len(votegainsin2015[winner2015]),'seats which the',winner2015,'party still holds in 2015 was',sum(votegainsin2015[winner2015])
print
print '--------------------------------------------------------------------------------------------------------------------------------------------------------'
print 'Finished printout of votes gained by',party,'in',year
print '--------------------------------------------------------------------------------------------------------------------------------------------------------'
print
return alsoin2015,totalvotegain,votegainsin2015,votegains
