如何简化重复的Python PuLP语法?

4
我该如何将以下Python PuLP语句简化成更加Pythonic、易于管理和正确的语句?
import pulp as lp

#delare variables
#Note that I have to model a 100 year period!
year_1 = lp.LpVariable("2011", 0, None, lp.LpInteger)    
year_2 = lp.LpVariable("2012", 0, None, lp.LpInteger)
year_. = lp.LpVariable("201.", 0, None, lp.LpInteger)
year_n = lp.LpVariable("201n", 0, None, lp.LpInteger)

#declare constraints
prob += year_1 - year_0 >= 0
prob += year_2 - year_1 >= 0
prob += year_. - year_. >= 0
prob += year_n - year_n_1 >= 0
1个回答

5

将100年变量替换为年份列表:

years = [lp.LpVariable(str(2011+i), 0, None, lp.LpInteger) for i in xrange(n)]

请注意,列表是从0开始索引的,因此以前的year_1现在变为years[0]

您可以在脚本的"declare constraints"部分循环遍历它:

for year, next_year in zip(years[:-1], years[1:]):
    prob += next_year - year >= 0

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