asked on

add properties

HonorGod,

How are you now, i hope you are feeling better now.

Please provide me a function which will scan the data dictionary and add properties that start with "os-environment." to the beginning of myproperties.properties file
location can be "beginning" or "end"

basically you need to implement a function that inserts a text into a properties file (beginning or end). Once i have that function i will add it to the <addpropeties> class

def addproperties(propertieslist, propertiesfile, location)
where properties list is something like {property1: value1, property2: value2}
basically a dictionary

mish33

Try that:

def addproperties(properties, propertiesfile, location):
    newprops = ['%s: %s\n' % i for i in properties.iteritems() if i[0].startswith('os-environment.')]
    if location == 'end':
        append(newprops, propertiesfile)
    else:
        prepend(newprops, propertiesfile)

def append(lines, file):
    with open(file, 'a') as f:
        f.writelines(lines)

def prepend(lines, file):
    tmp = 'new_properties_file'
    append(lines, tmp)
    append(open(file).readlines(), tmp)
    os.rename(tmp, file)

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WAS

ASKER

Mish33,

Thanks for helping me.
I am using Jython 2.5.2 interpreter for compiling my python programs,

i get below error
SyntaxError: 'with' will become a reserved keyword in Python 2.6
line 9

and also please explain the functions append and prepend, what are they doing, again what i am looking for is my addproperties function should look into dictionary for attributes (or what ever you call) "os-environment", and add those lines to my propertiesfile.

Let me know if you don't understand my question. It is very important that you understand my question.

Have a nice day.

ASKER CERTIFIED SOLUTION

mish33

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WAS

ASKER

The code looks good now.
I was just wondering why didn't you write the prepend function in the same manner as append. instead or creating a temp file and then renaming it.

mish33

There is no file open mode for adding to the beginning, so standard technic for that is creating a new file and appending the old file data to it.

WAS

ASKER

Thanks a lot Mish33