I am trying to read a gzipped csv file from a url. This is a very big file with more than 50.000 lines. When I try the code below I get an error: `_csv.Error: line contains NULL byte`

```
import csv
import urllib2   
url = '[my-url-to-csv-file].gz'
response = urllib2.urlopen(url)
cr = csv.reader(response)

for row in cr:
    if len(row) <= 1: continue
        print row

```

If I try to print the content of the file before I try to read it I get something like this:

> 
> ?M}?7?M==??7M???z?YJ?????5{Ci?jK??3b??p?
>  
>  ?[?=?j&=????=?0u'???}mwBt??-E?m??Ծ??????WM??wj??Z??ėe?D?VF????4=Y?Y?tA???
> 
> 
> 
> 
> 

How can I read the gzipped csv file from this URL properly?