这将从数组sys中删除"-v"的所有实例。Argv，如果没有找到实例，则不报错:

while "-v" in sys.argv:
    sys.argv.remove('-v')

你可以在一个名为speechToText.py的文件中看到代码的运行:

$ python speechToText.py -v
['speechToText.py']

$ python speechToText.py -x
['speechToText.py', '-x']

$ python speechToText.py -v -v
['speechToText.py']

$ python speechToText.py -v -v -x
['speechToText.py', '-x']

一些最简单的基准测试方法:

import random
from copy import copy
sample = random.sample(range(100000), 10000)
remove = random.sample(range(100000), 1000)

%%timeit
sample1 = copy(sample)
remove1 = copy(remove)

for i in reversed(sample1):
    if i in remove1:
        sample1.remove(i)
# 271 ms ± 16 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)
# remove all instances

%%timeit
sample1 = copy(sample)
remove1 = copy(remove)

filtered = list(filter(lambda x: x not in remove1, sample1))
# 280 ms ± 18.9 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)
# remove all instances

%%timeit
sample1 = copy(sample)
remove1 = copy(remove) 

filtered = [ele for ele in sample1 if ele not in remove1]
# 293 ms ± 72.1 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)
# remove all instances

%%timeit
sample1 = copy(sample)
remove1 = copy(remove) 

for val in remove1:
    if val in sample1:
        sample1.remove(val)
# 558 ms ± 40.7 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)
# only remove first occurrence

%%timeit
sample1 = copy(sample)
remove1 = copy(remove) 

for val in remove1:
    try:
        sample1.remove(val)
    except:
        pass
# 609 ms ± 11.7 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)
# only remove first occurrence

考虑:

a = [1,2,2,3,4,5]

要去除所有的事件，可以使用python中的filter函数。 例如，它看起来是这样的:

a = list(filter(lambda x: x!= 2, a))

因此，它将保留a != 2的所有元素。

只要拿出其中一项使用

a.remove(2)

正如许多其他答案所述，list.remove()将工作，但如果项不在列表中则抛出ValueError。在python 3.4+中，有一个有趣的方法来处理这个问题，使用suppress contextmanager:

from contextlib import suppress
with suppress(ValueError):
    a.remove('b')

这将从数组sys中删除"-v"的所有实例。Argv，如果没有找到实例，则不报错:

while "-v" in sys.argv:
    sys.argv.remove('-v')

你可以在一个名为speechToText.py的文件中看到代码的运行:

$ python speechToText.py -v
['speechToText.py']

$ python speechToText.py -x
['speechToText.py', '-x']

$ python speechToText.py -v -v
['speechToText.py']

$ python speechToText.py -v -v -x
['speechToText.py', '-x']

你可以这样做

a=[1,2,3,4]
if 6 in a:
    a.remove(6)

但以上需要在list a中搜索2次6，所以尝试except会更快

try:
    a.remove(6)
except:
    pass