a=[1,20,30,'',None,'','',None,10,'','']
c=['',None]
b=['10,20,200','2,40',4]

#刪除指定元素
#方法一
for i in a:
    for j in c:
        if j in a:
            a.remove(j)
print(a)

#方法二
for i in c:
    while i in a:
        a.remove(i)
print(a)
d=[]
for j in b:
    if ',' in str(j):
        s=j.split(',')
        d.extend(s)
    else:
        d.extend(str(j))
print(sorted(d))
d=list(map(int,d))#轉數字
print(d)
# e=['200', '10', '40', '2', '200', '4']
# print(sorted(e))

#刪除符合條件的元素
a=[10,20,3,10,50,1,2,5,4,8,7,6,9]
for i in range(len(a)):
    for j in a:
        if j%2==0:
            a.remove(j)#刪除滿足j%2=0的元素
print(a)