How to format string in url by python? [duplicate]

Question

I can format the link (link1) with 1 variable however when I want to format the link (link2) with 2 variables, it throws an error ( ValueError: unsupported format character 'A' (0x41) at index 94) The link2 is supposed to be : https://widget.s24.com/applications/1e082c83/widgets/422/products?searchTerm=Topper&origin=https%3A%2F%2Fwww.real.de%2Fproduct%2F324093002%2F

is there any solution for this ?

i = 324093002
b = "Topper"
link_product = 'https://www.real.de/product/%s/'
link_keyword = 'https://widget.s24.com/applications/1e082c83/widgets/422/products?searchTerm=*%s*&origin=https%3A%2F%2Fwww.real.de%2Fproduct%2F*%s*%2F'
link1 = link_product %i
link2 = link_keyword % (i, b)

%s expects string but 324093002 is number - did you try str(i) ? — furas
– furas, Commented Dec 8, 2020 at 12:49
Does this answer your question? Add params to given URL in Python — Maurice Meyer
– Maurice Meyer, Commented Dec 8, 2020 at 12:49

furas · Accepted Answer · 2020-12-08 13:00:25Z

2

Char % has special meaning in string formatting - like %s, %i, etc.- and you have %3A %2F which are not correct formatting. You have to use %% to inform Python that you need normal char % - %%3A %%2F

i = 324093002
b = "Topper"
link_keyword = 'https://widget.s24.com/applications/1e082c83/widgets/422/products?searchTerm=*%s*&origin=https%%3A%%2F%%2Fwww.real.de%%2Fproduct%%2F*%s*%%2F'

link2 = link_keyword % (i, b)
print(link2)

edited Dec 8, 2020 at 13:00

answered Dec 8, 2020 at 12:54

furas

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Z Li · Accepted Answer · 2020-12-08 13:00:22Z

1

Consider using the format() method:

i = 324093002
b = "Topper"
link_product = 'https://www.real.de/product/{}/'
link_keyword = 'https://widget.s24.com/applications/1e082c83/widgets/422/products?searchTerm={}&origin=https%3A%2F%2Fwww.real.de%2Fproduct%2F{}%2F'

link1 = link_product.format(i)
link2 = link_keyword.format(b, i)
print(link2)


'https://widget.s24.com/applications/1e082c83/widgets/422/products?searchTerm=Topper&origin=https%3A%2F%2Fwww.real.de%2Fproduct%2F324093002%2F'

edited Dec 8, 2020 at 13:00

answered Dec 8, 2020 at 12:53

Z Li

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2 Comments

Tom Myddeltyn Over a year ago

your i and b are backward in the format()

Tom Myddeltyn Over a year ago

Also drop the * around the {} to match the desired string. might as well change the first URL too.

YoniPrv · Accepted Answer · 2020-12-08 13:00:25Z

1

I would suggest to use f-string formatting (> Python 3.6). See here for more info.

i = 324093002
b = "Topper"
link_product = f"https://www.real.de/product/{i}/"
link_keyword = f"https://widget.s24.com/applications/1e082c83/widgets/422/products?searchTerm=*{i}*&origin=https%3A%2F%2Fwww.real.de%2Fproduct%2F*{b}*%2F"

answered Dec 8, 2020 at 13:00

YoniPrv

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Comments

Maurice Meyer · Accepted Answer · 2020-12-08 13:04:40Z

You should make use of urllib, to prevent mixing data with an already urlencoded URL:

from urllib.parse import urlencode, urljoin, urlparse

i = 324093002
b = "Topper"
link_product = urljoin('https://www.real.de/product/', str(i))

link_url = 'https://widget.s24.com/applications/1e082c83/widgets/422/products?{}'
link_params = {'searchTerm': i, 'origin': link_product}

link_keyword = link_url.format(urlencode(link_params))
print(link_keyword)

Out:

https://widget.s24.com/applications/1e082c83/widgets/422/products?searchTerm=324093002&origin=https%3A%2F%2Fwww.real.de%2Fproduct%2F324093002

Note:
Especially when b changes into a term that uses non URL safe characters, like Top top or iPhone7+ things get messed up using regular string formatting.

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