how to open a directory and i should read the files and need a particular line

[sudhakaranr]

HI,

Need your help please...
First thing, i want to open a directory and with in the directory i have 1000's of files and we need to read the file and i want a particular line which has the word "ID".

for example:

in a directory... i have file like the below.
-) abc1
-) abc2
-) abc3 like this i have 1000 files...

in the file abc1 -> i have a line called =>:student ID:stu12312
like that, each and every file has student ID...

The O/P should be like....

abc1 ------ stu12312
abc2 ------ stu........

.
.
.
.

Like this I need a output...

Please it's urgent...

Thanks in advance...

[bvdet]

HI,

Need your help please...
First thing, i want to open a directory and with in the directory i have 1000's of files and we need to read the file and i want a particular line which has the word "ID".

for example:

in a directory... i have file like the below.
-) abc1
-) abc2
-) abc3 like this i have 1000 files...

in the file abc1 -> i have a line called =>:student ID:stu12312
like that, each and every file has student ID...

The O/P should be like....

abc1 ------ stu12312
abc2 ------ stu........

.
.
.
.

Like this I need a output...

Please it's urgent...

Thanks in advance...

I am getting a lot of exercise in file I/O :-)

def dir_list5(dir_name, *args):
    fileList = []
    for file in os.listdir(dir_name):
        dirfile = os.path.join(dir_name, file)
        if os.path.isfile(dirfile): # skip directories
            if len(args) == 0:
                fileList.append('%s\n' %(dirfile))
            else:
                if os.path.splitext(dirfile)[1][1:] in args:
                    fileList.append('%s\n' %(dirfile))
    return "".join(fileList)
 
if __name__ == '__main__':
 
    def run_script():
 
        dir_name = (os.path.join('H:\\', 'TEMP', 'temsys'))
        fList = dir_list2(dir_name, 'txt')
        data_file = (os.path.join('H:\\', 'TEMP', 'temsys', 'student_data.dat'))
 
        try:
            fData = open(data_file, 'w')
 
            for f in fList.split():
 
                ff = open(f, "r")
                print f
                for line in ff:
                    if 'student ID:' in line:
                        # print line[line.index('student ID:')+11:]
                        print line.split('student ID:')[1]
                        fData.write("".join([os.path.basename(f),'----',line.split('student ID:')[1]]))
                ff.close()
 
            fData.close()
 
        except:
            raise IOError, "Could not open data file or file open error"
 
    import profile
    #profile.run('run_script()')
    run_script()

Output:

>>> H:\TEMP\temsys\abc1.txt
stu644850
 
H:\TEMP\temsys\abc2.txt
stu7739895
 
H:\TEMP\temsys\abc3.txt
stu77398
 
H:\TEMP\temsys\abc4.txt
stu3885
>>> 

Data file contents:

abc1.txt----stu644850
abc2.txt----stu7739895
abc3.txt----stu77398
abc4.txt----stu3885

Of course you need to substitute your specific information.

[bvdet]

By adding a break statement in the for loop, the iteration stops when the student ID is found:

def run_script():
 
        dir_name = (os.path.join('H:\\', 'TEMP', 'temsys'))
        fList = dir_list2(dir_name, 'txt')
        data_file = (os.path.join('H:\\', 'TEMP', 'temsys', 'student_data.dat'))
 
        try:
            fData = open(data_file, 'w')
            print
            for f in fList.split():
 
                ff = open(f, "r")
                print f
                for line in ff:
                    if 'student ID:' in line:
                        print line.split('student ID:')[1]
                        fData.write("".join([os.path.basename(f),'----',line.split('student ID:')[1]]))
                        break       # <------------- ADDED THE BREAK HERE
                ff.close()
 
            fData.close()
 
        except:
            raise IOError, "Could not open data file or file open error"

[sudhakaranr]

Thanks bv !!!!!!!!

It's really useful to me...

Thanks alot...

[bvdet]

Thanks bv !!!!!!!!

It's really useful to me...

Thanks alot...

You are welcome. I am glad we could help you. :-)