[Tutor] need an explanation

Matthew Ngaha chigga101 at gmail.com
Thu Oct 11 22:48:40 CEST 2012

> Obviously a Monty Python fan as I see 3 methods :)
lol i dont know what i was looking at.. yes its 3 methods sorry:(

>> def __init__(self):
>>      self.zipping_directory = "unzipped-{}".format(filename)
> Where did filename appear from above?
sorry i didnt write everything. the init method also had...
self.filename = filename  ... i will paste the whole code

> I suggest that you show us some real code that will run with some print
> statements in appropriate places to show us what is happening.  That way
> you may well be able to answer your own questions and learn at the same
> time.
> sadly when i run the file i get an error so i dont know what to doto fix
it and be able to run

@ DAVE.. you said
sys is a module (presumably you have an import
somewhere above this line). In the module, there's a list argv.

the import statements are:

import sys
import os
import shutil
import zipfile

so im guessing [sys, os, shutil, zipfile]  these are the arguments being
passed? my mind tells me no, as these are more likely the arguments in the
A_Class init method?

here is he full code... i changed the names in the mail to make it clearer.
so the names in the code will be different. A_Class is actually ZipReplace

i cant test it because on start the program returns this error and i dont
know how to fix it:

TypeError: __init__() takes exactly 4 positional arguments (1 given)

full code:

import sys
import os
import shutil
import zipfile

class ZipReplace:
    def __init__(self, filename, search_string, replace_string):
        self.filename = filename
        self.search_string = search_string
        self.replace_string = replace_string
        self.temp_directory = "unzipped-{}".format(

   def _full_filename(self, filename):
        return os.path.join(self.temp_directory, filename)

    def zip_find_replace(self):

   def unzip_files(self):
        zip = zipfile.ZipFile(self.filename)

    def find_replace(self):
        for filename in os.listdir(self.temp_directory):
            with open(self._full_filename(filename)) as file:
                contents = file.read()
            contents = contents.replace(
                    self.search_string, self.replace_string)
            with open(self._full_filename(filename), "w") as file:

   def zip_files(self):
        file = zipfile.ZipFile(self.filename, 'w')
        for filename in os.listdir(self.temp_directory):
            file.write(self._full_filename(filename), filename)

if __name__ == "__main__":

is a bit too advanced for me but i now see what it does.. although i wish
it didnt return an error when run.

so the arguments being passed are...

[os, shutil, zipfile] or [filename, search_string, return_string] ?
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