How to search and replace text from one file to another using Python?

Question

I have a file file1.txt :

I Show more flower you can see by link
All is Beautyfull.You Can View Here !
Link View :

http://lincoln.com/view/12432134/flower1.jpg    
http://lincoln.com/view/34645645/flower3456.jpg    
http://lincoln.com/view/75634534/flower56.jpg    
http://lincoln.com/view/86764454/flower2.jpg

and another one file2.txt :

http://lincoln.com/view/43645645/flower1.jpg    
http://lincoln.com/view/84344454/flower3456.jpg    
http://lincoln.com/view/43343433/flower56.jpg    
http://lincoln.com/view/13424324/flower2.jpg    
http://kashi.com/view/343434344/flower1.jpg    
http://kashi.com/view/766454544/flower3456.jpg    
http://kashi.com/view/32634545/flower56.jpg    
http://kashi.com/view/84353453/flower2.jpg

What I want is the following :

I Show more flower you can see by link
All is Beautyfull.You Can View Here !
Link View :

http://lincoln.com/view/43645645/flower1.jpg    
http://lincoln.com/view/84344454/flower3456.jpg    
http://lincoln.com/view/43343433/flower56.jpg    
http://lincoln.com/view/13424324/flower2.jpg

More Link VIew:

http://kashi.com/view/343434344/flower1.jpg    
http://kashi.com/view/766454544/flower3456.jpg    
http://kashi.com/view/32634545/flower56.jpg    
http://kashi.com/view/84353453/flower2.jpg    
++++++++++++++++++++++++++++++++++++++++

I Show more candy you can see by link
All is Beautyfull.You Can View Here !
http://photobucket.com

The pseudo-code being :

if filename exists in file1 but not in file2:
    remove filename
else if filename exists in file1 and in file2:
    the version in file2 replaces the line in file1
else if filename exists in file2 but not in file1:
    do nothing

add the links with the domaine name "http://kashi.com" from file2.txt
in a section "More link view"
add "++++++++++++++++++++++++++"

I Tried this algorithm :

def file_merge(file1name,file2name):
    file1contents = list()
    file2contents = list()
    file1 = open(file1name, 'U')
    for line in file1:
        line = line.replace('\n','')
        line = line.split('/')
        file1contents.append(line)
    file1.close()
    file2 = open(file2name, 'U')
    for line in file2:
        line = line.replace('\n','')
        line = line.split('/')
        file2contents.append(line)
    file2.close()
    file3contents = file1contents
    for x in file2contents:
        for y in file1contents:
            if x[-1] == y[-1]:
                file3contents[file3contents.index(y)] = x

    file3 = open(file1name,'w')
    for line in file3contents:
        file3.write(str('/'.join(line))+'\n')
    file3.close()

file_merge('file1.txt','file2.txt')

Thanks!

simple is : replace "filename" in file2.txt with "filename" in file1.txt

and append link http://kashi.com and 'filename' into a content before keyword"++++++++++++++++++++++++++++++++++++++++"

as:

[img]http://photobucket.com/98a267d32b056fb0a5c8c07dd4c35cc5.jpg[/img]

Fomart:IMG 
Quality:High



http://lincoln.com/view/4148476844/flower1.jpg
http://lincoln.com/view/4148476994/flowe2.jpg
http://lincoln.com/view/4148501374/flower3.jpg
http://lincoln.com/view/4148476324/flower4.jpg
http://lincoln.com/view/4148494685/flower5.jpg
http://lincoln.com/view/4148626615/flowew6.jpg

You Can VIEW More Link !



More Link:
http://kashi.com/view/414865/flower1.jpg
http://kashi.com/view/6344353/flower2.jpg
http://kashi.com/view/234234/flower3.jpg
http://kashi.com/view/6543534/flower4.jpg
http://kashi.com/view/2342342/flower5.jpg
http://kashi.com/view/234234/flower6.jpg


++++++++++++++++++++++++++++++++++++
[img]http://phtobucket.com/004_8N9FEWFZD7ECJC6.jpg[/img]
Format:Img
Quality:High


http://lincoln.com/view/4148633524/candy1.jpg
http://lincoln.com/view/4148538064/candy2.jpg
http://lincoln.com/view/4148537824/candy3.jpg
http://lincoln.com/view/4148562565/candy4.jpg
http://lincoln.com/view/4148562035/candy5.jpg




You Can VIEW More Link !




More Link:
http://kashi.com/view/23423423/candy1.jpg
http://kashi.com/view/345345/candy2.jpg
http://kashi.com/view/234234/candy3.jpg
http://kashi.com/view/3434342/candy4.jpg
http://kashi.com/view/234234234/candy5.jpg
+++++++++++++++++++++++++++++++++++++++++++++
...
...
And more content as above

You are only checking for 'jpg' filenames to match but if they don't you are not taking care of your 2 conditions : "1>If filename exists in file1 but not in file2 2> If filename exists in file2 but not in file1, it is do nothing And add kashi.com " — avasal
– avasal, Commented Dec 14, 2011 at 5:55
@j3oy9x In this thread, you're soliloquizing without taking account of what is written to you. Your 2 preceding questions got 9 downvotes. You have a peculiar way of communicating. You should think about that. Personally, I'll never pay more attention to your questions and edits as long as they will remain the same . You should consider what I'm writing here. Have a good life. — eyquem
– eyquem, Commented Dec 15, 2011 at 10:32

NPatel · Accepted Answer · 2011-12-14 09:38:00Z

2

Try this

import urlparse
import os

def file_merge(file1name,file2name):

    file1contents = list()
    file2contents = list()

    file1 = open(file1name, 'U')
    file1contents = file1.readlines()
    file1.close()

    file2 = open(file2name, 'U')
    file2contents = file2.readlines()
    file2.close()

    file3contents = []

    for link in file2contents:
        temp = urlparse.urlsplit(link)
        dirname, filename = os.path.split(temp.path)

        file3contents.append(link)

        linkin1 = False
        for l_link in file1contents[4:]:
            if l_link.endswith(filename):
                linkin1 = True

        if not linkin1:
            urllist = list(temp)
            urllist[1] = 'kashi.com'
            file3contents[-1] = urlparse.urlunsplit(urllist)


    file3 = open(file1name,'w')
    for line in file3contents:
        file3.write(line)
    file3.close()

file_merge('/tmp/file1.txt','/tmp/file2.txt')

answered Dec 14, 2011 at 9:38

NPatel

21.4k17 gold badges104 silver badges165 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

j3oy9x Over a year ago

Thanks ! I tested your code .But it does not achieve the desired results.All I need is:If filename exists in file1 but not in file2, it is remove If filename exists in file1 and file2, the version in file2 replaces the line in file1 If filename exists in file2 but not in file1, it is do nothing And add kashi.com is More Link View follow filename before keyword "++++++++++++++++++++++++++

NPatel Over a year ago

Can you please specify the 3 cases exclusively, as per my understanding: Case 1: Filename exists in file1 but not in file2 - remove it Case 2: Filename exists in file1 and file2 - entry of file2 remains Case 3: Filename not in file1 but exists in file2 - add kashi.com to domain name Let me know which case is failing.

eyquem · Accepted Answer · 2011-12-14 23:13:07Z

try this, please:

with open('file2.txt','r') as f2:
    dic2 = {}
    li2 = []
    for line in f2:
        spli = line.rstrip().replace('http://','').split('/')
        dic2[(spli[0],spli[-1])] = line if line[-1]=='\n' else line+'\n'
        li2.append((spli[0],spli[-1]))

with open('file1.txt','r') as f1,open('file3.txt','w') as f3:

    itr1 = iter(f1)

    for line in itr1:
        f3.write(line)
        if line.strip()=='':
            break

    for line in itr1:
        if line.strip():
            spli = line.rstrip().replace('http://','').split('/')
            x = (spli[0],spli[-1])
            if x in li2:
                f3.write(dic2[x])
                li2.remove((spli[0],spli[-1]))
    klu = '\n' if line.rstrip()==line else ''
    # to add a blank line if the last line wasn't '\n'-ended
    f3.write(klu + '\nMore Link VIew:\n\n')

    for remain in li2:
        f3.write(dic2[remain])

    f3.write('++++++++++++++++++++++++++++++++++++++++ ')

ondra · Accepted Answer · 2011-12-14 23:55:04Z

This works; however it really seems to me very strange question in the first place...sorry...

from urlparse import urlparse
import os.path

def read_links2(f):
    for line in f:
        line = line.strip()
        url = urlparse(line)
        if url.scheme in ('http', 'https'):
            key = (url.netloc, os.path.split(url.path)[1])
            yield (key, url)

links2 = dict(read_links2(open('f2.txt', 'U')))

for line in open('f1.txt', 'U'):
    line = line.rstrip()
    url = urlparse(line)
    if url.scheme in ('http', 'https'):
        key = (url.netloc, os.path.split(url.path)[1])
        if key in links2:
            print links2[key].geturl()
    else:
        print line

print 'More Link VIew:'

for url in links2.values():
    if url.netloc == 'kashi.com':
        print url.geturl()


print '+++++++++++++++++++'

Collectives™ on Stack Overflow

How to search and replace text from one file to another using Python?

3 Answers 3

2 Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

2 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related