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How to use PyCharm to debug Scrapy projects
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The scrapy command is a python script which means you can start it from inside PyCharm.
When you examine the scrapy binary (which scrapy) you will notice that this is actually a python script:
#!/usr/bin/python
from scrapy.cmdline import execute
execute...
Can I use __init__.py to define global variables?
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But every time a script imports config.py, the code inside is executed. What do you recommend if the code inside config.py is to be run only once? Say I'm reading a settings.json file inside config.py and I don't want to open() it every time ...
Extract file name from path, no matter what the os/path format
....basename as others suggest won't work in all cases: if you're running the script on Linux and attempt to process a classic windows-style path, it will fail.
Windows paths can use either backslash or forward slash as path separator. Therefore, the ntpath module (which is equivalent to os.path when ...
How do I execute inserts and updates in an Alembic upgrade script?
...els and sessions as described below.
The following is an example migration script that sets up some declarative models that will be used to manipulate data in a session. The key points are:
Define the basic models you need, with the columns you'll need. You don't need every column, just the prima...
Change column type from string to float in Pandas
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@orange the warning is to alert users to potentially confusing behavior with chained operations, and with pandas returning copies of rather than editing dataframes. see stackoverflow.com/questions/20625582/… and related.
– A.Wa...
Sleep until a specific time/date
I want my bash script to sleep until a specific time. So, I want a command like "sleep" which takes no interval but an end time and sleeps until then.
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Shell script while read line loop stops after the first line
I have the following shell script. The purpose is to loop thru each line of the target file (whose path is the input parameter to the script) and do work against each line. Now, it seems only work with the very first line in the target file and stops after that line got processed. Is there anything ...
How to get URL of current page in PHP [duplicate]
...age was redirected via mod_rewrite - the former has the path to the actual script, the latter has the originally requested path.
– Amber
Aug 16 '09 at 2:19
1
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Repeat Character N Times
...epeat || function(n){
n= n || 1;
return Array(n+1).join(this);
}
alert( 'Are we there yet?\nNo.\n'.repeat(10) )
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Versioning SQL Server database
...ngle production database instance, I use two techniques:
Database Upgrade Scripts
A sequence database upgrade scripts that contain the DDL necessary to move the schema from version N to N+1. (These go in your version control system.) A _version_history_ table, something like
create table Versio...