CODEWITHSUNDEEP
pythonstringpython-3.x
alberto
alberto

Reputation: 131

How can i run a loop that adds values to a string?

my files names look like this:

data00001
data00002
data00003
....
data00010
....

i have them saved and want to download them from the website they're in using this code:

import urllib.request as urllib2

response = urllib2.urlopen("https://somewebsite/data00001.mat")
file = open(r"C:\Users\me\Desktop\data\data00001.mat", 'wb')
file.write(response.read())
file.close()

i shall give the starting and end file name for example:

from data00001 to data01000 so in this example i want the files from data0001 to data01000 downloaded. how can i increment the numeric value near data to make that work?

Upvotes: 0

Views: 99

Answers (3)

Agile_Eagle
Agile_Eagle

Reputation: 1839

try this:

for i in range(1, 1001):
    filename = "data" + str(i).zfill(4) + ".mat" # gives a padding of four digits

You can use filename for all your operations

Upvotes: 5

taras
taras

Reputation: 6914

You can use integer range and formatted print with zero padding:

import urllib.request as urllib2

for i in range(1000):
    filename = 'data{:05d}.mat'.format(i)
    response = urllib2.urlopen("https://somewebsite/" + filename)
    file = open(r"C:\Users\me\Desktop\data\" + filename, 'wb')
    file.write(response.read())
    file.close()

Upvotes: 0

Vasilis G.
Vasilis G.

Reputation: 7846

It is fairly easy to retrieve all your files within a loop:

import urllib.request as urllib2

counter = 1
limit = 1000
filename = "data"

for i in range(limit+1):
    newFilename = "".join([filename,str(i).zfill(5)])
    response = urllib2.urlopen("https://somewebsite/" + newFilename + ".mat")
    file = open(r"C:\\Users\\me\\Desktop\\data\\" + newFilename + ".mat", 'wb')
    file.write(response.read())
    file.close()

Upvotes: 0

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