CODEWITHSUNDEEP
pythonlist
Asteroid098
Asteroid098

Reputation: 2825

How to check if multiple substrings appear together in a string

strings = ['I have a bird', 'I have a bag and a bird', 'I have a bag']
words = ['bird','bag']

I want to find the string that includes both bird and bag in the list strings, regardless of order. So the result for only the second element in strings should be true and the rest should be false.

The output I want:

False
True
False

words do not necessarily need to be stored in list, and I know that regex could do a similar thing but I would prefer to use other ways than regex because my words are mandarin chinese which requires some complicated use of regex than english.

Upvotes: 3

Views: 12586

Answers (5)

s3bw
s3bw

Reputation: 3049

This is it:

for substring in strings:
    k = [ w for w in words if w in substring ]
    print (len(k) == len(words) )

Upvotes: 1

nikhalster
nikhalster

Reputation: 481

For variable number of words, without using the split function. 

strings = ['I have a bird', 'I have a bag and a bird', 'I have a bag']
words = ['bird','bag']

 for string in strings:
    print(all(word in string for word in words))

Upvotes: 1

Aakash Goel
Aakash Goel

Reputation: 1030

Use of function all() would be best option here, but point is doing without for loop. Here is solution using map/lambda function.

strings = ['I have a bird', 'I have a bag and a bird', 'I have a bag']
words = ['bird','bag']
map(lambda x: all(map(lambda y:y in x.split(),words)),strings)

output would be:

[False, True, False]

However, Naive Solution is for beginner:

for string in strings:
    count_match=0
    for word in words:
        if word in string.split():
            count_match+=1
    if(count_match==len(words)):
        print "True"
    else:
        print "False"

And output would be :

False
True
False

Upvotes: 1

Fuji Komalan
Fuji Komalan

Reputation: 2047

strings = ['I have a bird', 'I have a bag and a bird', 'I have a bag']
words = ['bird','bag']


for string in strings:
  stringlist = string.split()
  word1 , word2 = words
  if word1 in stringlist and word2 in stringlist:
    print(True)
  else:
    print(False)

Result

False True False

Upvotes: 2

languitar
languitar

Reputation: 6794

List comprehension will work combined with the all function:

[all([k in s for k in words]) for s in strings]

This results in the following on your example:

[False, True, False]

Upvotes: 8

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