search for words in a textfile using another textfile

[nouth]

textfileA = one word per line
textfileB = multiple words per line
textfileC = words that I have manually found already

if words from textfileA also exist in textfileB, I need to replace the words in textfileB with "error" and write the replaced words from textfileB to new lines in textfileC

[vegaseat]

Need to see some coding on your part.
What have you tried?

[nouth]

a = open("textfileA", "r")
b = open("textfileB", "r+")
c = open("textfileC", "a")
while 1:
    word = a.readline()
    if not word: break
    for line in b:
        if line.contains(word):
            c.write("Error: " + word + " -in-> " + line + "\n")

I decide I do not need to replace anything (I would prefer to check it manually instead, but this would help to make it all very more efficient)

textfileA and textfileB contain words (alphanumeric+decimal+space) surrounds by double quotes and seperate by comma
textfileA: "word"
textfileB: "word","word","word"

[TrustyTony]

if line.contains(word):

What is this method? Are you not using standard strings? Normal python uses word in line, this looks like Ruby.

[nouth]

line 8 should be if word in line: ?

I am new to computer programming and I was told python is easiest

[snippsat]

textfileB: "word","word","word"

So dos your text file look like this when you read it?

with open("textfileB.txt") as f:
    your_file = f.read()

print your_file

Can you post the output?
The reason why i ask is because it not normal to have quotes in file.
If it's quotes you have to remove them,so you can get word without quotes.

>>> your_file
'"foo","bar","hello"\n'
>>> your_file.split(',')
['"foo"', '"bar"', '"hello"\n']
>>> your_file.split(',')[0]
'"foo"'
>>> print your_file.split(',')[0]
"foo" #You see it's not the word foo, but "foo" 

Remove quotes.

>>> [i.strip().strip('"') for i in your_file.split(',')]
['foo', 'bar', 'hello']
>>> [i.strip().strip('"') for i in your_file.split(',')][0]
'foo'
>>> print [i.strip().strip('"') for i in your_file.split(',')][0]
foo

[nouth]

I remove characters

i, o = open('input', 'r'), open('output', 'w')
o.write(i.read().replace('"', '').replace(',', ' '))

but this still does not work, textfileA I make one line no quotes "test" and textfileB also put no quotes "test" to many lines and different places but textfileC still empty

a, b, c = open("textfileA", "r"), open("textfileB", "r+"), open("textfileC", "a")
while 1:
    word = a.readline()
    if not word: break
    for line in b:
        if word in line:
            c.write("Error: " + word + " -in-> " + line + "\n")

[snippsat]

Ok i am not sure about your input,so i wirte something that may be what you want.
Remember you have to use close() on fileobject when you write to file or nothing gets written.
Always use close() when open/close like this open('input', 'r')
I use with open(),then is no need to close() fileobject because it's done automatic.

'''
textfileA.txt-->
bar
world

textfileB.txt-->
foo bar hello bar
'''

with open('textfileA.txt') as file_a, open('textfileB.txt') as file_b,\
open('textfileC.txt', 'w') as file_c:
    file_a = [i.strip() for i in file_a]
    file_b = file_b.read().split()
    for index,item in enumerate(file_b):
        for word in file_a:
            if word == item:
                file_b[index] = 'error'
    file_c.write(' '.join(file_b))

'''
textfileC.txt-->
foo error hello error
'''

[nouth]

textfileA:

21.83
34.51
53.24
43.16
79.24

textfileB:

13 x 55 58.69 4CaSJ7yBNkRkB1xw56Vk
78 x 14 53.24 EWRlAuMwBIeunoS3u34u
35 x 52 99.46 lj1WqoCwdAyV5Ne0GOow
75 x 67 32.56 ENuhVQn4Qj4rR1KAgsjc
15 x 24 14.04 RMkSoF4yfLriFn0dQqNX

textfileC:

Error: 53.24 -in-> 78 x 14 53.24 EWRlAuMwBIeunoS3u34u \n

this is just example textfileA has 170 lines textfileB has 25281 lines

[nouth]

I don't have textfileA.txt only textfileA
I think I may have found the bug
word = a.readline() will make '21.83\n'
so how can I remove '\n' from the end of a string word = word[:-1]

with open("textfileA") as a, open("textfileB") as b, open("textfileC", "w") as c:
    for word in a:
        if not word: break
        word = word[:-1]
        for line in b:
            if not line: break
            line = line[:-1]
            if word in line:
                c.write("Error: " + word + " -in-> " + line)

and now it can work but only for the first line in textfileA and then for line in b: never works again

>>> with open("textfileA") as a, open("textfileB") as b, open("textfileC", 'w') as c:
...     for word in a:
...         if not word: break
...         word = word[:-1]
...         print word
...         for line in b:
...             if not line: break
...             line = line[:-1]
...             if word in line:
...                 print "Error: " + word + " -in-> " + line
... 
test
Error: test -in-> 78 x 14 53.24 EWRlAtestuMwBIeunoS3u34u
Error: test -in-> 75 x 67 test 32.56 ENuhVQn4Qapplej4rR1KAgsjc
apple
test
21.83
34.51
53.24
43.16
79.24
>>> 

how can I make my for line in b: not lazy anymore?

[nouth]

think I solved it :)

#!/usr/bin/env python

with open("textfileA") as a, open("textfileC", 'w') as c:
    for word in a:
        if not word: break
        word = word[:-1]
        with open("textfileB") as b:
            for line in b:
                if not line: break
                line = line[:-1]
                if word in line:
                    c.write("Error: " + word + " -in-> " + line)

[snippsat]

think I solved it :)

Yes that look good.
Can clean it up little.
word[:-1] is more common to use word.strip()

>>> s = 'bar\n'
>>> s
'bar\n'
>>> s.strip()
'bar'

So then it can look like this,remove if not word: break

with open("textfileA.txt") as a, open("textfileC.txt", 'w') as c:
    for word in a:
        word = word.strip()
        with open("textfileB.txt") as b:
            for line in b:
                line = line.strip()
                if word in line:
                    c.write('Error: {} -in-> {}'.format(word, line))

[nouth]

thanks again ;)
I found out about the single-line if statements

if word in line: c.write("Error: {} -in-> {}".format(word, line))

then I moved .strip() so I could remove all lines that didn't end with :

with open("textfileA") as a, open("textfileC", "w") as c:
    for word in a:
        with open("textfileB") as b:
            for line in b:
                if word.strip() in line.strip(): c.write("Error: {} -in-> {}".format(word.strip(), line.strip()))

I tried to make it all on a single line but it didn't work :( I have lost my logic

with open("textfileA") as a, open("textfileC", "w") as c: for word in a: with open("textfileB") as b: for line in b: if word.strip() in line.strip(): c.write("Error: {} -in-> {}".format(word.strip(), line.strip()))

and this doesn't work either

if word.strip() as word in line.strip() as line: c.write("Error: {} -in-> {}".format(word, line))

[nouth]

if (word.strip() as word) in (line.strip() as line): c.write("Error: {} -in-> {}".format(word, line))

and

if (word = word.strip(); word) in (line = line.strip(); line): c.write("Error: {} -in-> {}".format(word, line))

don't work

[snippsat]

don't work

Don't do this now code is ugly and obfuscated.
Read PEP-8,try to follow advice in PEP-8.

It can be fun to fit a lot of code into one line,this is most for fun and compositions like Golf code

(M. Fowler)
Any fool can write code that a computer can understand.
Good programmers write code that humans can understand.

[nouth]

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