looping through two list simultenously

[CSUIDL PROGRAMMEr]

folks
I have two lists

i am trying to loop thorough them simultenously.

Here is the code i am using

f1 = os.popen('ls chatlog*.out')
data1=f1.readlines()
f1.close()

data1=[x.strip() for x in data1]
f1 = os.popen('ls chatlog*.txt')
data=f1.readlines()
f1.close()
for eachline in data1 and line in data:

filename='/root/Desktop/project/'+ eachline
print filename
outfile=open(filename,'r')
filename1='/root/Desktop/project/' + line
print filename1

I get the error that line is not defined.
Traceback (most recent call last):
File "list.py", line 16, in ?
for eachline in data1 and line in data:
NameError: name 'line' is not defined

Is there any efficient doing this

 

[Guest]

folks I have two lists

i am trying to loop thorough them simultenously.

Is there any efficient doing this

Try the built-in function zip.

zip(['a', 'b', 'c'], [1, 2, 3])

[('a', 1), ('b', 2), ('c', 3)]

 

[Daniel Nogradi]

folks

I have two lists

i am trying to loop thorough them simultenously.

Here is the code i am using
[...]

Is there any efficient doing this

Try the zip function:

list1 = [ 'a', 'b', 'c' ]
list2 = [ 'A', 'B', 'C' ]
for i, j in zip( list1, list2 ):

.... print i, j
....
a A
b B
c C

 

[wittempj]

folks
I have two lists

i am trying to loop thorough them simultenously.

Here is the code i am using

f1 = os.popen('ls chatlog*.out')

You can replace this by
py> import glob
py> f1 = glob.glob('chatlog*.out')
it will return a list of filenames in f1, so you can skip next two
lines in your code

data1=f1.readlines()
f1.close()

If you use the glob this step can be skipped too, as glob returns the
filenames, without any whitespace added

data1=[x.strip() for x in data1]

f1 = os.popen('ls chatlog*.txt')
data=f1.readlines()
f1.close()
for eachline in data1 and line in data:

filename='/root/Desktop/project/'+ eachline
print filename
outfile=open(filename,'r')
filename1='/root/Desktop/project/' + line
print filename1

now you do the zip as suggested by the other people, but be aware that
it only returns the tuples as long as the shortest list is, so it might
be a good idea to add a test on equality of the number of .log and .txt
files
py> import glob
py> f1 = glob.glob('chatlog*.out')
py> f2 = glob.glob('chatlog*.txt')
py> if len(f1) != len(f2):
py> print "number of .out files doesn't match number of .txt files"
py> f3 = zip(f1, f2)
now f3 will be somethine like [('chatlog1.out',
'chatlog1.txt'),('chatlog2.out', 'chatlog2.txt')], then you can
continue with your iteration loops

 

[jim-on-linux]

folks
I have two lists

i am trying to loop thorough them
simultenously.

Try something like this.

for eachline in data1:
print eachline
for line in data::
print line

You might also think about a while loop.

jim-on-linux

http://www.inqvista.com

Here is the code i am using

f1 = os.popen('ls chatlog*.out')
data1=f1.readlines()
f1.close()

data1=[x.strip() for x in data1]
f1 = os.popen('ls chatlog*.txt')
data=f1.readlines()
f1.close()
for eachline in data1 and line in data:

filename='/root/Desktop/project/'+ eachline
print filename
outfile=open(filename,'r')
filename1='/root/Desktop/project/' + line
print filename1

I get the error that line is not defined.
Traceback (most recent call last):
File "list.py", line 16, in ?
for eachline in data1 and line in data:
NameError: name 'line' is not defined

Is there any efficient doing this

 

[Paul McGuire]

folks
I have two lists

i am trying to loop thorough them simultenously.

Here is the code i am using

f1 = os.popen('ls chatlog*.out')
data1=f1.readlines()
f1.close()

data1=[x.strip() for x in data1]
f1 = os.popen('ls chatlog*.txt')
data=f1.readlines()
f1.close()
for eachline in data1 and line in data:

Change:
for eachline in data1 and line in data:

to:
for eachline, line in zip(data1,data):


-- Paul