遍历字典值以形成 URL

Question

I'm trying to iterate through the values in the dictionary below in order to add each value to form a unique URL (using Python 2 here):

base_url = 'https://www.edimark.fr/resultat-recherche/magazine/'
magazine = {
    'La Lettre du Cancerologue': '14',
    'La Lettre du Pharmacologue': '10',
    "La Lettre de l'Hepato gastroenterologue": '4',
    "La Lettre de l'Infectiologue": '2'
    }

When I iterate through itervalues, it sequentially adds each number to the previous number. Code and output below:

for itervalue in magazine.itervalues:
    base_url = base_url + itervalue
    print base_url

https://www.edimark.fr/resultat-recherche/magazine/4
https://www.edimark.fr/resultat-recherche/magazine/410
https://www.edimark.fr/resultat-recherche/magazine/4102
https://www.edimark.fr/resultat-recherche/magazine/410214

Whereas the intended output is achieved when I do not save the result to a variable...

for itervalue in magazine.itervalues:
    base_url + itervalue

'https://www.edimark.fr/resultat-recherche/magazine/4'
'https://www.edimark.fr/resultat-recherche/magazine/10'
'https://www.edimark.fr/resultat-recherche/magazine/2'
'https://www.edimark.fr/resultat-recherche/magazine/14'

Could anyone please let me know what I'm doing wrong here? Pretty new to Python, so any help is much appreciated!

Answer 1

you could use:

for itervalue in magazine.itervalues:
    aux_base_url = aux_base_url + itervalue
    print aux_base_url

you are changing the value for base_url on each iteration adding to the original base_url all the values from magazine.itervalues , to fix this you could store the intermediary result in an auxiliary variable aux_base_url

the auxiliary variable makes sense if you want to do more then just to print if you want only to print is more convenient to use:

print base_url + itervalue

Answer 2

     base_url = base_url + itervalue  

This is cumulative. You have to assign the new URL to another variable, for example:

      url = base_url + itervalue