Python: Download multiple .gz files from single URL
Question: I am having trouble downloading multiple network files from an online
directory. I am using a virtual Linux environment (Lubuntu) over VMware. My
aim is to access a subfolder and download all the .gz files it contains into a
new local directory that is different from the home directory. I tried
multiple solutions and this is the closest I got.

    
    
    import os
    from urllib2 import urlopen, URLError, HTTPError
    def dlfile(url):
        # Open the url
        try:
            f = urlopen(url)
            print "downloading " + url
    
            # Open our local file for writing
            with open(os.path.basename(url), "wb") as local_file:
                local_file.write(f.read())
    
        #handle errors
        except HTTPError, e:
            print "HTTP Error:", e.code, url
        except URLError, e:
            print "URL Error:", e.reason, url
    
    
    def main():
        # Iterate over image ranges
        for index in range(100, 250,5):
            url = ("http://data.ris.ripe.net/rrc00/2016.01/updates20160128.0%d.gz"
                    %(index))
            dlfile(url)
    
    if __name__ == '__main__':
        main()
    

The online directory needs no authentication, a link can be found
[here](http://data.ris.ripe.net/rrc00/2016.01/).

I tried string manipulation and using a loop over the filenames, but it gave
me the following error:

    
    
    HTTP Error: 404 http://data.ris.ripe.net/rrc00/2016.01/updates20160128.0245.gz
    


Answer: Look at the url

Good url: `http://data.ris.ripe.net/rrc00/2016.01/updates.20160128.0245.gz`

Bad url (your code):
`http://data.ris.ripe.net/rrc00/2016.01/updates20160128.0245.gz`

A dot between updates and 2016 is missing

