topic Re: Unzip in Python Script in Python Questions

Unzip in Python Script

DarrenClay — Wed, 16 Feb 2011 16:57:16 GMT

I am trying to unzip a Zip file in a Windows directory. Does anyone know the commands to do this.

Thanks in advance.

the Zipfile library is too confusing for me.

Re: Unzip in Python Script

JasonScheirer — Sun, 12 Dec 2021 00:29:19 GMT

import zipfile

zip = zipfile.ZipFile(r'c:\my.zip')
zip.extractall(r'c:\output')

This will extract the contents of my.zip to c:\output

Re: Unzip in Python Script

JasonScheirer — Sun, 12 Dec 2021 00:29:22 GMT

def zip_directory_to_zipfile(directory, out_zipfile):

    out_zip = zipfile.ZipFile(out_zipfile, 'w')

    for (dirpath, dirnames, filenames) in os.walk(directory):
        for file in filenames:
            path_in_zip = os.path.join(os.path.relpath(dirpath, 
                                                lib_dir), 
                                                file)
            if os.path.split(path_in_zip)[0] == ".":
                path_in_zip = os.path.split(path_in_zip)[1]
            out_zip.write(os.path.join(dirpath, file), path_in_zip)

Re: Unzip in Python Script

JasonScheirer — Sun, 12 Dec 2021 00:29:25 GMT

I think you are onto somthing, but I need a little help integrating it into the arcpy module. What would it be like if we know that the dirpath is the arcpy.env.workspace is the current one. Then we want to make everything in that dirpath zipped up. Would it make the script shorter somehow?

Not really.

def zip_directory_to_zipfile(out_zipfile):

    out_zip = zipfile.ZipFile(out_zipfile, 'w')
 
    for (dirpath, dirnames, filenames) in os.walk(arcpy.env.workspace):
        for file in filenames:
            path_in_zip = os.path.join(os.path.relpath(dirpath, 
                                                lib_dir), 
                                                file)
            if os.path.split(path_in_zip)[0] == ".":
                path_in_zip = os.path.split(path_in_zip)[1]
            out_zip.write(os.path.join(dirpath, file), path_in_zip)

Re: Unzip in Python Script

JasonScheirer — Thu, 17 Feb 2011 22:49:25 GMT

If that's what you want, then a .zip file is not the appropriate distribution mechanism -- workspaces can be more than a directory, such as an .sde file or file geodatabase, and a dataset living in any non-directory workspace would not be included in the zip. In fact, it would be hard to even include .shp files in the directory tree because ListDatasets would return each one without the .shp extension.

For what you want, use a Map or Layer package from desktop to consolidate your data.

Re: Unzip in Python Script

JasonScheirer — Fri, 25 Feb 2011 20:29:40 GMT

The tool documentation includes examples.

Re: Unzip in Python Script

ScottBlankenbeckler — Wed, 30 Nov 2011 21:28:10 GMT

Jason,

I am using your code to zip up a single file in a directory. However the zip file and the original file(*.txt) are the same size (i.e. 0% compression) what would cause this and what do I need to look for to correct it.

Re: Unzip in Python Script

JasonScheirer — Wed, 30 Nov 2011 22:22:13 GMT

Try this:

out_zip = zipfile.ZipFile(out_zipfile, 'w', zipfile.ZIP_DEFLATED)

Re: Unzip in Python Script

ScottBlankenbeckler — Thu, 01 Dec 2011 12:28:38 GMT

That fixed it. Much thanks.

New problem.

Any way to set it up so that it creates a split zip file of 5MB max size.
i.e. the original file is just over 10.7MB using the code above but my email server will only allow a 10MB file. If I can split the file into a split zip of 5MB parts I can send it as two emails.

Re: Unzip in Python Script

meriyalootka — Fri, 25 Jan 2013 07:04:40 GMT

That fixed it. Much thanks.

New problem.

Any way to set it up so that it creates a split zip file of 5MB max size.
i.e. the original file is just over 10.7MB using the code above but my email server will only allow a 10MB file. If I can split the file into a split zip of 5MB parts I can send it as two emails.

I have a simple model for Unzip a zip folder and get it's features. But I can not get extracted features. What is wrong in my model?

Re: Unzip in Python Script

KATIEATKINSON — Wed, 04 Sep 2013 18:34:11 GMT

I want to create a ESRI tool using python scrips to:
1) Unzip a txt file that is inside a zipped file.
2) I would like to save the txt as a csv removing the first and last rows (would like to make these part of the name or metadata) the first row is the date created and the last row is file info. The column headder is the second row.
3) There are 2 columns I would like to delete
4)Then I need to change the column headings to remove the spaces and match the fields names as I would like to geocode them.
5) I need to concatenate several fields to create a single address field for the geocode. My address locator that I created uses a single address field with Zip.
6) Geocode the csv with my created Address Locator to my master address point file.

Is this possible?