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Display help message with python argparse when script is called without any arguments
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This answer comes from Steven Bethard on Google groups. I'm reposting it here to make it easier for people without a Google account to access.
You can override the default behavior of the error method:
import argparse
import sys
class MyParser(argparse.ArgumentParser):
def error(self, me...
Is it Linq or Lambda?
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This is LINQ (using query syntax):
var _Results = from item in _List
where item.Value == 1
select item;
This is also LINQ (using method syntax):
var _Results = _List.Where(x => x.Value == 1);
It's interesting to note that both of these flav...
Is it possible to make abstract classes in Python?
...depending upon your Python version.
In Python 3.4 and above, you can inherit from ABC. In earlier versions of Python, you need to specify your class's metaclass as ABCMeta. Specifying the metaclass has different syntax in Python 3 and Python 2. The three possibilities are shown below:
# Python 3.4...
How do you loop through each line in a text file using a windows batch file?
...or /F "tokens=*" %%A in (myfile.txt) do [process] %%A
The tokens keyword with an asterisk (*) will pull all text for the entire line. If you don't put in the asterisk it will only pull the first word on the line. I assume it has to do with spaces.
For Command on TechNet
If there are spaces in yo...
About .bash_profile, .bashrc, and where should alias be written in? [duplicate]
It seems that if I use
4 Answers
4
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Django. Override save for model
...,small_pic)
super(Model, self).save(*args, **kwargs)
Not sure if it would play nice with all pseudo-auto django tools (Example: ModelForm, contrib.admin etc).
share
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improve this answer
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Specify multiple attribute selectors in CSS
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Simple input[name=Sex][value=M] would do pretty nice. And it's actually well-described in the standard doc:
Multiple attribute selectors can be used to refer to several
attributes of an element, or even several times to the same attribute.
Here, the selector matches all S...
java.lang.NoClassDefFoundError: com/sun/mail/util/MailLogger for JUnit test case for Java mail
I am using Java Mail API to read and parse emails. It is working fine with Servlet code.
7 Answers
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Quick Sort Vs Merge Sort [duplicate]
...uicksort is significantly
faster in practice than other Θ(nlogn)
algorithms, because its inner loop can
be efficiently implemented on most
architectures, and in most real-world
data, it is possible to make design
choices which minimize the probability
of requiring quadratic time.
No...
SQL Server equivalent to Oracle's CREATE OR REPLACE VIEW
In Oracle, I can re-create a view with a single statement, as shown here:
9 Answers
9
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