python如何删除列表中指定的元素

>>> str=[1,2,3,4,5,2,6]

>>> str.remove(2)

>>> str

[1, 3, 4, 5, 2, 6]

>>> str=[0,1,2,3,4,5,6]

>>> str.pop(1)   #pop删除时会返回被删除的元素

>>> str

[0, 2, 3, 4, 5, 6]

>>> str2=['abc','bcd','dce']

>>> str2.pop(2)

'dce'

>>> str2

['abc', 'bcd']

>>> str=[1,2,3,4,5,2,6]

>>> del str[1]

>>> str

[1, 3, 4, 5, 2, 6]

>>> str2=['abc','bcd','dce']

>>> del str2[1]

>>> str2

['abc', 'dce']

>>> str=[0,1,2,3,4,5,6]

>>> del str[2:4]  #删除从第2个元素开始，到第4个为止的元素(但是不包括尾部元素)

>>> str

[0, 1, 4, 5, 6]

>>> str=[0,1,2,3,4,5,6]

>>> del str

>>> str         #删除后，找不到对象

Traceback (most recent call last):

  File "<pyshell#27>", line 1, in <module>

    str

NameError: name 'str' is not defined

s1=(1,2,3,4,5,6)

s2=(2,3,5)

s3=[]

for i in s1:

if i not in s2:

    s3.append(i)

print 's1-1:',s1

s1=s3

print 's2:',s2

print 's3:',s3

print 's1-2:',s1