Python 中级
Hugo Bowne-Anderson
Data Scientist at DataCamp
pop = [30.55, 2.77, 39.21] countries = ["afghanistan", "albania", "algeria"] ind_alb = countries.index("albania") ind_alb
pop = [30.55, 2.77, 39.21]
countries = ["afghanistan", "albania", "algeria"]
ind_alb = countries.index("albania")
ind_alb
1
pop[ind_alb]
2.77
pop = [30.55, 2.77, 39.21] countries = ["afghanistan", "albania", "algeria"] ... { }
countries = ["afghanistan", "albania", "algeria"] ...
{ }
pop = [30.55, 2.77, 39.21] countries = ["afghanistan", "albania", "algeria"] ... {"afghanistan":30.55, }
{"afghanistan":30.55, }
pop = [30.55, 2.77, 39.21] countries = ["afghanistan", "albania", "algeria"] ... world = {"afghanistan":30.55, "albania":2.77, "algeria":39.21} world["albania"]
world = {"afghanistan":30.55, "albania":2.77, "algeria":39.21}
world["albania"]
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