Linear search/searching for a word in a file/list

[kietrichards]

Guys, I have to make a program that and then asks user to input some word let's say (until user types STOP) and then checks if the word is in the list by linear search. And I can't use "in" operator here. This is so weird to me, can you give me some tips?
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import sys   infile = open("ex5.acc", "r")   acc = '' line = infile.readline()   while acc != "STOP":    acc = input("Enter acc nr")    line = infile.readline()    if acc != line and acc != "STOP":        print("It seems that there is no such accession nr in the file")    elif acc == line:        print("Accession number found") print("Seems like you don;t want to search anymore")

[Larz60+]

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def check_word(word, text):     words = text.split()     for item in words:         if item == word:             return True     return False   line = "It seems that there is no such accession nr in the file" print(check_word('accession', line)) print(check_word('dog', line))

output:

Output:
True
False

[kietrichards]

Oh but you see. You used "in". And I can't do that. That's an exercise. :(

[Larz60+]

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def check_word(word, text):     idx = 0     words = text.split()     while True:         try:             if word == words[idx]:                 return True             idx += 1         except IndexError:             return False    line = "It seems that there is no such accession nr in the file" print(check_word('accession', line)) print(check_word('dog', line))

Output:
True
False