python Sort用法
阿新 • • 發佈:2018-11-24
planets = [ ('Mercury',2440,5.43,0.395), ('Venus',6052,5.24,0.723), ('Earth',6378,5.52,1.000), ('Mars',3396,3.93,1.530) ] size = lambda planet: planet[1] planets.sort(key=size,reverse=True) print(planets) # [('Earth', 6378, 5.52, 1.0), ('Venus', 6052, 5.24, 0.723), ('Mars', 3396, 3.93, 1.53), ('Mercury', 2440, 5.43, 0.395)] size2 = lambda planet: planet[2] planets.sort(key=size2,reverse=True) print(planets) # [('Earth', 6378, 5.52, 1.0), ('Mercury', 2440, 5.43, 0.395), ('Venus', 6052, 5.24, 0.723), ('Mars', 3396, 3.93, 1.53)] size3 = lambda planet: planet[3] planets.sort(key=size3,reverse=True) print(planets) # [('Mars', 3396, 3.93, 1.53), ('Earth', 6378, 5.52, 1.0), ('Venus', 6052, 5.24, 0.723), ('Mercury', 2440, 5.43, 0.395)] # sort 排序後更改掉了原list # sorted 不會更改原list earth_metal = ["Beryllium","Magnesium","Calcium","Strontium","Barium","Radius"] sorted_earth_metals = sorted(earth_metal) print(earth_metal) # ['Beryllium', 'Magnesium', 'Calcium', 'Strontium', 'Barium', 'Radius'] print(sorted_earth_metals) # ['Barium', 'Beryllium', 'Calcium', 'Magnesium', 'Radius', 'Strontium'] data = (7,2,5,6,1,3,9,10,4,8) print(sorted(data)) # sorted tuple[1, 2, 3, 4, 5, 6, 7, 8, 9, 10] print(data) # (7, 2, 5, 6, 1, 3, 9, 10, 4, 8) print(sorted("Asopauiodsuds")) # ['A', 'a', 'd', 'd', 'i', 'o', 'o', 'p', 's', 's', 's', 'u', 'u']