To unzip a file
Question: I want to unzip a file of type *.sec.gz which is a zipfile. But i'm getting
badfile.....Can someone guide to resolve this.....File present in the folder
is of type *.sec ........Thanks in advance

    
    
    import zipfile
    def unzip(path):
        zfile = zipfile.ZipFile(path)
        for name in zfile.namelist():
            (dirname, filename) = os.path.split(name)
            if filename == '':
                # directory
                if not os.path.exists(dirname):
                    os.mkdir(dirname)
            else:
                # file
                fd = open(name, 'w')
                fd.write(zfile.read(name))
                fd.close()
        zfile.close()
    
    k=unzip('C://test//08October2014//DATA_INTV_NEW//Oct0814//1.sec.gz')
    

Output:

    
    
    BadZipfile                                Traceback (most recent call last)
    <ipython-input-7-5134b63e752e> in <module>()
         27     zfile.close()
         28 
    ---> 29 k=unzip('C://test//08October2014//DATA_INTV_NEW//Oct0814//1.sec.gz')
    
    <ipython-input-7-5134b63e752e> in unzip(path)
         13 
         14 def unzip(path):
    ---> 15     zfile = zipfile.ZipFile(path)
         16     for name in zfile.namelist():
         17         (dirname, filename) = os.path.split(name)
    
    C:\Python27\Lib\zipfile.pyc in __init__(self, file, mode, compression, allowZip64)
        768         try:
        769             if key == 'r':
    --> 770                 self._RealGetContents()
        771             elif key == 'w':
        772                 # set the modified flag so central directory gets written
    
    C:\Python27\Lib\zipfile.pyc in _RealGetContents(self)
        809             raise BadZipfile("File is not a zip file")
        810         if not endrec:
    --> 811             raise BadZipfile, "File is not a zip file"
        812         if self.debug > 1:
        813             print endrec
    
    BadZipfile: File is not a zip file
    


Answer: The error message is completely accurate: that is not a zip file. It is a gzip
file, which is something completely different. You should use the [gzip
module](https://docs.python.org/2/library/gzip.html).

