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# Class to describe a Ratio, and a collection of common
# (and not-so-common) film ratios collected from Wikipedia.
class Ratio:
def __init__(self, ratio, nickname = None):
self.nickname = nickname
self.ratio = ratio
# @return presentation name of this ratio
def name(self):
if self.nickname is not None:
return "%.2f (%s)" % (self.ratio, self.nickname)
return "%.2f" % self.ratio
ratios = []
ratios.append(Ratio(1.33, '4:3'))
ratios.append(Ratio(1.37, 'Academy'))
ratios.append(Ratio(1.78, '16:9'))
ratios.append(Ratio(1.85, 'Flat / widescreen'))
ratios.append(Ratio(2.39, 'CinemaScope / Panavision'))
ratios.append(Ratio(1.15, 'Movietone'))
ratios.append(Ratio(1.43, 'IMAX'))
ratios.append(Ratio(1.5))
ratios.append(Ratio(1.56, '14:9'))
ratios.append(Ratio(1.6, '16:10'))
ratios.append(Ratio(1.67))
ratios.append(Ratio(2, 'SuperScope'))
ratios.append(Ratio(2.2, 'Todd-AO'))
ratios.append(Ratio(2.35, 'Early CinemaScope / Panavision'))
ratios.append(Ratio(2.37, '21:9'))
ratios.append(Ratio(2.55, 'CinemaScope 55'))
ratios.append(Ratio(2.59, 'Cinerama'))
ratios.append(Ratio(2.76, 'Ultra Panavision'))
ratios.append(Ratio(2.93, 'MGM Camera 65'))
ratios.append(Ratio(4, 'Polyvision'))
# Find a Ratio object from a fractional ratio
def find(ratio):
for r in ratios:
if r.ratio == ratio:
return r
return None
# @return the ith ratio
def index_to_ratio(i):
return ratios[i]
# @return the index within the ratios list of a given fractional ratio
def ratio_to_index(r):
for i in range(0, len(ratios)):
if ratios[i].ratio == r:
return i
return None
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