Question

如何删除列表中的字母和数字元素？下面的代码没有删除，我在做什么错呢？在研究了其他stackoverflow之后，他们正在删除字符，但未删除元素本身。

ls = ['1a', 'b3', '1.45','apples','oranges','mangoes']
cleaned = [x for x in ls if x is not x.isalnum() or x is not x.isdigit()]
cleaned

result = re.sub(r'[^a-zA-Z]', "", ls)
print(result) #expected string or bytes-like object

输出应为：

['apples','oranges','mangoes']
enter code here

Answer 1

尝试一下：

ls = ['1a', 'b3', '1.45','apples','oranges','mangoes']

[l for l in ls if l.isalpha()]

输出：

['apples', 'oranges', 'mangoes']

Answer 2

尝试：-

ls = ['1a', 'b3', '1.45','apples','oranges','mangoes']
l = []
for i in ls:
    if not bool(re.search(r'\d', i)):
        l.append(i)
print(l)

Answer 3

我会这样：

newList = []
for x in ls:
    if x.isalpha():
        newList.append(x)

print(newList)

对我有用。如果元素不包含数字，则只会将其添加到新列表中。

python删除列表中的alphanum和numbers元素

3 个答案: