Check list of words in another string

Question

I can do such thing in python   l     one    two    three   if  some word  in l           This will check if  some word  exists in the list  But can I do reverse thing   l     one    two    three   if l in  some one long two phrase three             I have to check whether some words from array are in the string  I can do this using cycle but this way has more lines of code

User · Accepted Answer

if any word in  some one long two phrase three  for word in list

User · Answer

If your list of words is of substantial length  and you need to do this test many times  it may be worth converting the list to a set and using set intersection to test  with the added benefit that you wil get the actual words that are in both lists     gt  gt  gt  long word list    some one long two phrase three about above along after against   gt  gt  gt  long word set   set long word list split     gt  gt  gt  set  word along river  split     amp  long word set set   along

User · Answer

Easiest and Simplest method of solving this problem is using re  import re  search list     one    two    there   long string    some one long two phrase three  if re compile     join search list  re IGNORECASE  search long string    re IGNORECASE is used to ignore case       Do Something if word is present else        Do Something else if word is not present

User · Answer

Here are a couple of alternative ways of doing it  that may be faster or more suitable than KennyTM s answer  depending on the context   1  use a regular expression   import re words re   re compile     join list of words    if words re search  some one long two phrase three         do logic you want to perform   2  You could use sets if you want to match whole words  e g  you do not want to find the word  the  in the phrase  them theorems are theoretical    word set   set list of words  phrase set   set  some one long two phrase three  split    if word set intersection phrase set         do stuff   Of course you can also do whole word matches with regex using the   b  token   The performance of these and Kenny s solution are going to depend on several factors  such as how long the word list and phrase string are  and how often they change   If performance is not an issue then go for the simplest  which is probably Kenny s

[python] Check list of words in another string

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