Python Forum

Hello,

I have elements in a predefined list and a query string. I would like to check if the query_str has any values in predefined list and if so, append them to a new list as separate elements.

predefined_lst = ['hello', 'goodbye', 'see you later']
query_str  = 'hello | are you having a nice day?  see you later |'
new_lst = [ ]

I have the syntax to compare the string to the values in the list, but I can't get the values that appear in the string to append to the new list as individual elements in the list.
In the example above, new_lst should be

new_lst = ['hello', 'see you later']

What I have now just results in True when I print new_lst. Thanks for any help

new_list = []
match = if any(string in query_str for string in predefined_lst)
new_lst.append(match)
print(new_lst)

tips
1. any return true or false.
this is a true and false statement.

string in query_str

so if you remove if any.
it returns a generator of true and false

(string in query_str for string in predefined_lst)

2. write it out long hand. avoid the expression.

predefined_lst = ['hello', 'goodbye', 'see you later']
query_str = 'hello | are you having a nice day?  see you later |'
new_lst = [string for string in predefined_lst if string in query_str]
print(new_lst)

Output:
['hello', 'see you later']

DBS

Windspar

Yoriz