Conf data into a list

[WarFan]

Hello,

I'm wanting to learn how to make a list out of data from a conf file.

In my conf file I have this:

[someitems]
item1 = 100
item2 = 100
item3 = 100
item4 = 100

In my script, it will read the config then I want to put the keys? into a list.
I then will see if an item is in that list.
mykeys = ['item1', 'item2', 'item3', 'item4']
I do not want the values in the list, just the item1,item2..ect

Im new to Python so bear with me :/

Thank You

[ilikepython]

Hello,

I'm wanting to learn how to make a list out of data from a conf file.

In my conf file I have this:

[someitems]
item1 = 100
item2 = 100
item3 = 100
item4 = 100

In my script, it will read the config then I want to put the keys? into a list.
I then will see if an item is in that list.
mykeys = ['item1', 'item2', 'item3', 'item4']
I do not want the values in the list, just the item1,item2..ect

Im new to Python so bear with me :/

Thank You

You can do with re:

import re
 
patt = re.compile(r"""^([\w]+)
                       [ \t]+=[ \t]+
                       ([\w]+)$
                   """, re.VERBOSE | re.MULTILINE)   # to make it look nice
 
s = "item1 = 100\nitem2 = 100\nitem3 = 100\nitem4 = 100"
data = patt.findall(s)
myKeys = [t[0] for t in data]
print myKeys
 

See if that works for you.
Or you could do it without re:

s = "item1 = 100\nitem2 = 100\nitem3 = 100\nitem4 = 100"
lines = s.split("\n")
 
myKeys = []
for line in lines:
    key_value = [kv.strip() for kv in line.split("=")]
    myKeys.append(key_value[0])
 
print myKeys
 

Try that.

[bvdet]

Hello,

I'm wanting to learn how to make a list out of data from a conf file.

In my conf file I have this:

[someitems]
item1 = 100
item2 = 100
item3 = 100
item4 = 100

In my script, it will read the config then I want to put the keys? into a list.
I then will see if an item is in that list.
mykeys = ['item1', 'item2', 'item3', 'item4']
I do not want the values in the list, just the item1,item2..ect

Im new to Python so bear with me :/

Thank You

Something like this?

import re
 
def import_data(fn):
    patt = r'(.+)=.+'
    return [item.strip() for item in re.findall(patt, open(fn).read())]
 
# OR
def import_data(fn):
    fileList = open(fn).readlines()
    return [item.split('=')[0].strip() for item in fileList if '=' in item]
 
# Same as above without the list comprehension
def import_data(fn):
    fileList = open(fn).readlines()
    result = []
    for item in fileList:
        if '=' in item:
            result.append(item.split('=')[0].strip())
    return result
 
print import_data('your_file')

Output:
>>> ['item1', 'item2', 'item3', 'item4']

[WarFan]

Ok, Ill give it a shot.
I was thinking there would be an easier way to search for a section and just return the keys. I guess I was way off..lol Thanks, Ill let you know if one of the methods described works.

[WarFan]

Ok, after digging around some more and trying different things. This is what I came up with that I was looking to do using ConfigParser. Thanks

# a section in items.cfg
[someitems]
item1 = 100
item2 = 100
item3 = 100
item4 = 100

section = "someitems"
myitems = []
readme = config.read("items.cfg")
for option in config.options(section):
myitems.append(option)

returns ['item1', 'item2', 'item3', 'item4']

[ghostdog74]

Ok, after digging around some more and trying different things. This is what I came up with that I was looking to do using ConfigParser. Thanks

# a section in items.cfg
[someitems]
item1 = 100
item2 = 100
item3 = 100
item4 = 100

section = "someitems"
myitems = []
readme = config.read("items.cfg")
for option in config.options(section):
myitems.append(option)

returns ['item1', 'item2', 'item3', 'item4']

the little "nuisance" i see using configparser is if you config file changes, ie, you added some more items , you have to change your Python script to get those items. ( I could be wrong though as I have not used this module for quite some time). I think its better to code your own little parsing routine so that you don't have to edit your script if your config files changes.eg
[code]
for line in open("file"):
if line.startswith("#"): continue
if line.startswith("["): continue
else:
if line.startswith("["):
continue
else:
line=line.strip().split("=")
print line
[code]
output:

['item1 ', ' 100']
['item2 ', ' 100']
['item3 ', ' 100']
['item4 ', ' 100']
 

then you can put them in lists etc...up toyou.

[WarFan]

That would be ok but I have 7 other sections in the cfg file. Wouldnt that code return them all? Im trying to return a certain section at a time.

[ghostdog74]

That would be ok but I have 7 other sections in the cfg file. Wouldnt that code return them all? Im trying to return a certain section at a time.

its just a matter of storing them for later use , isn't it.? You can use dictionaries, list , whatever you find comfortable with..

sections={}
for line in open("file"):
    line=line.strip()
    if line.startswith("#"): continue
    if line.startswith("["):
        s=line
        sections[s]=[]
        continue
    else:
        if line.startswith("["): 
            continue
        else:
            line=line.strip().split("=")
            sections[s].append(line)
 
for i,j in sections.iteritems():
    print i,j
 

output:

[someitems] [['item1 ', ' 100'], ['item2 ', ' 100'], ['item3 ', ' 100'], ['item4 ', ' 100'], ['']]
[moreitems] [['item5 ', ' 700'], ['item6 ', ' 701'], ['item7 ', ' 702']]
 
 

[bvdet]

That would be ok but I have 7 other sections in the cfg file. Wouldnt that code return them all? Im trying to return a certain section at a time.

Following is another version that will return a specific section. Comment out one of the return statements to return a list or dictionary.

def import_key_data(fn, key, q=('[',']')):
    f = open(fn)
 
    # skip to key section
    s = f.next()
    while s.strip() != key.join(q):
        s = f.next()
 
    result = []
    for line in f:
        if line.startswith(q[0]):
            break
        else:
            if '=' in line:
                result.append([item.strip() for item in line.split('=')])
    f.close()
    # return dictionary
    return dict(zip([i[0] for i in result], [j[1] for j in result]))
    # return list of keys
    # return [i[0] for i in result]

Sample usage:

print import_key_data('data_file_name', 'someitems')

>>> {'item2': '100', 'item3': '100', 'item1': '100', 'item4': '100'}

>>> ['item1', 'item2', 'item3', 'item4']