bash 如何使用变量在 Python 中使用 wget 下载？
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How to download with wget in Python using variables?
提问by user2437965
I need to do something like this, but in Python instead of Bash:
我需要做这样的事情，但在 Python 而不是 Bash：
i=1
while [ $i <= 10 ] ; do
wget http://somewebsite.net/shared/fshared_$i.7z
$i = $i + 1
done
In Python I tried with the following:
在 Python 中，我尝试了以下操作：
import urllib, os
i = 0
while i <= 3:
os.system('wget http://somewebsite.net/shared/fshared_',i,'.7z')
i = i + 1
But it does not work, the variable is not concatenated correctly (or something similar).
Using Bash code does not work, apparently in Bash can't do something simple like: i = i + 1
但它不起作用，变量没有正确连接（或类似的东西）。
使用 Bash 代码不起作用，显然在 Bash 中不能做一些简单的事情，比如：i = i + 1
Could anyone help me with this?
有人可以帮我解决这个问题吗？
SOLVED!:)
解决了！:)
Now I have the script both Bash and Python, actually with Python I have several variants.
现在我有 Bash 和 Python 的脚本，实际上我有 Python 的几个变体。
Thanks to all... thanks a lot ^-^
谢谢大家...非常感谢^-^
How do I mark the topic as solved?
如何将主题标记为已解决？
Thanks again.
再次感谢。
回答by karthikr
Try
尝试
os.system('wget http://somewebsite.net/shared/fshared_%s.7z'%i)
use %sinstead of ,
使用%s代替,
回答by karthikr
You canincrement in Bash. You have to do something like:
您可以在 Bash 中递增。您必须执行以下操作：
i=3
(( i++ ))
echo $i
That last like should print 4. So your script would be:
最后一个喜欢应该打印 4。所以你的脚本应该是：
i=1
while [ $i -le 10 ] ; do
wget http://somewebsite.net/shared/fshared_$i.7z
(( i++ ))
done
Edit: fixed code to use -leinstead of <=since <=doesn't work in bash.
编辑：固定代码使用-le而不是<=因为<=在 bash 中不起作用。
回答by Thomas Fenzl
回答by maazza
Try this
尝试这个
import urllib, os
i = 0
while i <= 3:
os.system('wget http://somewebsite.net/shared/fshared_%s.7z' % i)
i = i + 1
回答by Zignd
To fix the problem with the concatenation, you need to use +to concatenate instead of ,, because when you use ,to concatenate two strings it separate them with a space character between, the same doesn't happen when you use +because it "really" concatenate the strings.
要解决连接问题，您需要使用+to concatenate 而不是,，因为当您使用,连接两个字符串时，它会用空格字符将它们隔开，使用时不会发生同样的情况，+因为它“真正”连接了字符串。
E.g.:
例如：
print('Hello' + 'World' + '!')
print('Hello', 'Stack', 'Overflow!')
Output:
输出：
HelloWorld!
Hello Stack Overflow!
Your code would look like this now using +instead of ,:
你的代码现在看起来像这样使用+而不是,：
#...
os.system('wget http://somewebsite.net/shared/fshared_' + i + '.7z')
#... ^ ^
回答by Saumyakanta Sahoo
you can also specify python to ask you the url to pass to wget
你也可以指定python来询问你传递给wget的url
import os
path = raw_input("enter the url:")
os.system('wget -r -nd -l1 --no-parent -A mp3 %s'%path)
in place of 'mp3' use whatever format you want to download.
使用您要下载的任何格式代替“mp3”。
