How can I remove double quotes from a list in python?-CodePudding

I have the following problem:

I have a string that contains multiple E-Mail adresses. These adresses are not static. I pull them from my database. So for example when the adresses are pulled and I print the string the output is:

mails = 'email1', 'email2', 'email3'

Now I want to make a list out of the string. So my code is:

list = [mails]

But when I print the list, I get the following result:

["'email1', 'email2', 'email3'"]

How can I remove the double quotes, so that the output looks like this?

['email1', 'email2', 'email3']

Thank you for your answers :)

CodePudding user response：

Using Regex and list comprehension:

import re
my_list = [re.sub(r"'([^'] )'", r"\1", x) for x in my_list]

Explanation: What is inside single quotes gets added to group which the replacement string \1 is referring to.

CodePudding user response：

Supposing you have, in your code:

mails = 'email1', 'email2', 'email3'

That is a tuple of strings, i.e.

('email1', 'email2', 'email3')

You can simply convert that into a list by casting:

mails = list(mails)

which will produce

['email1', 'email2', 'email3']

Of course, all depends on your input data. Normally you would retrieve the data from your database and add it instantly to a list or some data structure that supports the intended functionality on that data better than a list.

CodePudding user response：

Just Do this:

mails = 'email1', 'email2', 'email3'
mails= list(mails)
print(mails)

and now the result will be the same as you want:

['email1', 'email2', 'email3']

CodePudding user response：

import json
a_list = json.dumps(emails)

Is how i would do it If i wanted a string representation like what is described...