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is there anyway to make a file inside a zip file seekable in Python without reading it to memory?
I tried the obvious procedure but I get an error since the file is not seekable:
In [74]: inputZipFile = zipfile.ZipFile("linear_g_LAN2A_F_3keV_1MeV_30_small.zip", 'r')
In [76]: inputCSVFile = inputZipFile.open(inputZipFile.namelist()[0], 'r')
In [77]: inputCSVFile
Out[77]: <zipfile.ZipExtFile at 0x102f5fad0>
In [78]: inputCSVFile.se
inputCSVFile.seek inputCSVFile.seekable
In [78]: inputCSVFile.seek(0)
---------------------------------------------------------------------------
UnsupportedOperation Traceback (most recent call last)
<ipython-input-78-f1f9795b3d55> in <module>()
----> 1 inputCSVFile.seek(0)
UnsupportedOperation: seek
486
extractall() method will extract all the contents of the zip file to the current working directory. You can also call extract() method to extract any file by specifying its path in the zip file. This will extract only the specified file.
import zipfile archive = zipfile. ZipFile('images. zip', 'r') imgdata = archive. read('img_01.
The ZIP file format is a common archive and compression standard. This module provides tools to create, read, write, append, and list a ZIP file. Any advanced use of this module will require an understanding of the format, as defined in PKZIP Application Note.
Method #1: Using compression=zip in pandas. read_csv() method. By assigning the compression argument in read_csv() method as zip, then pandas will first decompress the zip and then will create the dataframe from CSV file present in the zipped file.
There is no way to do so for all zip files. DEFLATE is a stream compression algorithm, which means that there is no way to decompress arbitrary parts of the file without having decompressed everything before it. It could possibly be implemented for files that have been stored, but then you get in the unfavorable position where some entries are seekable and others aren't.
111
ZipExtFile is now seekable :
https://bugs.python.org/issue22908 https://github.com/python/cpython/commit/066df4fd454d6ff9be66e80b2a65995b10af174f
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