python 循环内部添加多个条件判断会出现越界

# -*- coding: utf-8 -*-

a=[11,22,33,44,55]

for i in a:
    if i == 11 or i ==22:
        a.remove(i)

for i in a:
    print(i)

‘‘‘
22
33
44
55
[Finished in 0.1s]
‘‘‘

# -*- coding: utf-8 -*-

a=[11,22,33,44,55]

b=[]

for i in a:
    if i == 11 or i ==22:
        b.append(i)
for i in b:
    a.remove(i)
for i in a:
    print(i)

‘‘‘
33
44
55
[Finished in 0.1s]
‘‘‘