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#随机数的使用 import random #导入random random.randint(0,9)#制定随机数0到9 i=random.sample(range(1,34),6)#输出6个随机数,范围是1到34 i.sort()#排序方法,排序时更改原数组,无返回值 sorted(i)#排序函数,排序时不影响原数组,产生新的排序后数据 print('----------------用上述的随机数做一个双色球---------------------') sj=random.sample(range(1,34),6) print(sj,random.randint(1,17)) #if多值判断 n=4 if n in (4,5,6,8): print('元组里面有',n,'这个值') else: print('元组里面不存在',n,'这个值') #利用while循环输出1dao100的和 i=0 he=0 while i<100 : he=he+i i+=1 print(he) #list集合使用冒泡排序从大道小排序 li=[9,5,1,8,7,3] for i in range(0,len(li)): for j in range(0,len(li)-i-1): if li[j]<li[j+1]: li[j],li[j+1]=li[j+1],li[j] print(li) #字符串的使用(方法,与参数) zf=('我的家乡在河南!') print(zf[4])#跟据下标输出,带第4个 print(zf[4:])#下标后面的字符 print(zf[2:5])#两下标之间的字符 print(zf[1:2]*2)#输出的字符串*2倍 print(zf.index('南'))#输出指定自负串的下标 print(zf.replace('的','得',1))#替换字符串,只替换一个 print(zf.endswith('南'),5,6)#最后的是否存在 print('家' in zf)#字符是否存在其中 #列表 print('---------------列表------------------') lb=['abc','123'] print(lb.append('456'))#添加单个 lb+=['a','b']#添加多个 lb.remove('a')#删去一个 o=lb.pop(0)#指定下标输出 lb.insert(2,'125')#指定下标修改 lb.clear()#删除所有 print(lb) print('--------推导--------') td=['Hi','Hello','word','python','Height','wall','Hight'] print([s for s in td if s.startswith('H')])
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