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How to pass a user defined argument in scrapy spider
I am trying to pass a user defined argument to a scrapy's spider. Can anyone suggest on how to do that?
5 Answers
...
Using do block vs braces {}
...he bracket syntax
has a higher precedence than the
do..end syntax. Consider the following
two snippets of code:
1.upto 3 do |x|
puts x
end
1.upto 3 { |x| puts x }
# SyntaxError: compile error
Second example only works when parentheses is used, 1.upto(3) { |x| puts x }
...
What is the difference between ${var}, “$var”, and “${var}” in the Bash shell?
...forms can get hard to read (and therefore hard to maintain). This page provides a good introduction to quoting in Bash.
Arrays ($var vs. $var[@] vs. ${var[@]})
Now for your array. According to the bash manual:
Referencing an array variable without a subscript is equivalent to referencing the a...
What is an EJB, and what does it do?
...and
sharing common state across client callers. This can be easily over-ridden to manually
configure or programmatically control advanced scenarios for concurrent code execution
and data access.
Automated transaction handling.
Do nothing at all and all your EJB methods are run
in a JTA transact...
How can I save an image with PIL?
...is code for my problem, but I get plain black images. Does anyone have any idea about this? stackoverflow.com/questions/24266000/…
– user961627
Jun 17 '14 at 15:08
add a com...
Pass data to layout that are common to all pages
...ut page. However this layout page have data which all pages model must provide such page title, page name and the location where we actually are for an HTML helper I did which perform some action. Also each page have their own view models properties.
...
Set value to null in WPF binding
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled...
Linux, Why can't I write even though I have group permissions?
...
Did you logout and log back in after making the group changes? See:
Super User answer involving touch permissions failure
share
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Java resource as file
...
I agree it's annoying - but it makes ClassLoader more widely applicable in other ways. For instance, it's easy to write a "web classloader" because the web is good for fetching files, but it doesn't typically list files.
– Jon Skeet
Mar 24 '...
django urls without a trailing slash do not redirect
...T request to be lost.". "The APPEND_SLASH setting is only used if CommonMiddleware is installed...". I prefer Michael Gendin's answer for a cleaner solution.
– Wtower
Feb 11 '15 at 9:26
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