Change Character in Sublist

Question

I already know this is a really dumb question. I tried looking up my answer but I barely know what to ask. (sorry if the title is a little vague). But Here I go. I have a list of words. I'm wanting to get rid of the bad characters in that list.

List = ["I?", "Can", "!Not", "Do.", "It"]
BadChars = ["?", "!", "."]

for word in List:
    for char in word:
        if char in BadChars:
            char = ""

print(List)

Again, I know this is very simple, but I just can't figure it out. Forgive me.

EDIT: Btw, it's not giving me an error. It's just returning the List untouched.

Possible duplicate of [Removing character in list of strings](https://stackoverflow.com/questions/8282553/removing-character-in-list-of-strings) — j-i-l, Mar 16 '19 at 00:36
@davedwards I appreciate your comment. I already looked at this post about 20 minutes ago and it didn't help me. — , Mar 16 '19 at 00:36
you're almost there! Problem is that you set the variable `char` to `''` if it is in the `BadChars` list and leave the `word` unchanged. What you really want is setting the char in `word` to `''` if it is in `BadChars`, this can be done using the [`replace`](https://www.pythoncentral.io/pythons-string-replace-method-replacing-python-strings/) method, like `word.replace("?", "")` — j-i-l, Mar 16 '19 at 00:40

score 1 · Answer 1 · answered Mar 16 '19 at 00:38

1

You can use a generator expression that iterates over each character in a string and retains characters that are not in BadChars:

[''.join(c for c in s if c not in BadChars) for s in List]

This returns:

['I', 'Can', 'Not', 'Do', 'It']

answered Mar 16 '19 at 00:38

blhsing

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DjaouadNM · Accepted Answer · 2019-03-16T00:46:29.007

0

You could use the replace method, for each char for each word:

List = ["I?", "Can", "!Not", "Do.", "It"]
BadChars = ["?", "!", "."]

for i in range(len(List)):
  for char in BadChars:
    List[i] = List[i].replace(char, "")

print(List) # ==> ['I', 'Can', 'Not', 'Do', 'It']

A regex may be used as well:

import re

List = ["I?", "Can", "!Not", "Do.", "It"]
BadChars = ["?", "!", "."]
rgx = '[%s]'%(''.join(BadChars))

List = [re.sub(rgx, "", word) for word in List]

print(List) # ==> ['I', 'Can', 'Not', 'Do', 'It']

edited Mar 16 '19 at 00:46

answered Mar 16 '19 at 00:36

DjaouadNM

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This worked! Thank you so much. I really do appreciate it. – Mar 16 '19 at 00:38
Glad it helped. – DjaouadNM Mar 16 '19 at 00:42
1

@davedwards Yeah I already upvoted and i'm going to Accept this answer when the cool down is off. – Mar 16 '19 at 00:48

score 0 · Answer 3 · answered Mar 16 '19 at 00:49

0

List = ["I?", "Can", "!Not", "Do.", "It"]
l=[]
BadChars = ["?", "!", "."]
for i in List:
    for j in BadChars:
        if j in i:
            i=i.strip(j)
    l.append(i)


print(l)

Just use strip method to remove BadChars from List

answered Mar 16 '19 at 00:49

Challa Sai Bhanu Teja

91
8

Change Character in Sublist

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