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How do I extend a class with c# extension methods?
...
{
public static DateTime Tomorrow
{
get { return DateTime.Now.AddDays(1); }
}
}
Which you would use like this:
DateTime tomorrow = DateTimeHelper.Tomorrow;
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Get exception description and stack trace which caused an exception, all as a string
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See the traceback module, specifically the format_exc() function. Here.
import traceback
try:
raise ValueError
except ValueError:
tb = traceback.format_exc()
else:
tb = "No error"
finally:
print tb
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How can I read a function's signature including default argument values?
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If a function has argument annotations or keyword only arguments (= if you are using Python 3) you have to call getfullargspec instead. (ValueError: Function has keyword-only arguments or annotations, use getfullargspec() API...
What characters are valid for JavaScript variable names?
...t it would be if it weren't for the fact that Unicode escape sequences are now valid in identifiers, too! This is exact according to the ES6 spec: (?:[\p{ID_Start}\$_]|\\u(?:[\dA-Fa-f]{4}|\{[\dA-Fa-f]+\}))([\p{ID_Continue}\$_\u200C\u200D]|\\u(?:[\dA-Fa-f]{4}|\{[\dA-Fa-f]+\}))*
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Get class name of django model
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Instead of doing Book.__class__.__name__ on class itself, if you do it over a book object, then book_object.__class__.__name__ will give you 'Book' (i.e the name of the model)
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What to put in a python module docstring? [closed]
...ion are roughly equivalent to help in terms of amount of information). So if you have in x.py:
"""This module does blah blah."""
class Blah(object):
"""This class does blah blah."""
then:
>>> import x; help(x)
shows:
Help on module x:
NAME
x - This module does blah blah.
FI...
Calling a class function inside of __init__
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If I'm not wrong, both functions are part of your class, you should use it like this:
class MyClass():
def __init__(self, filename):
self.filename = filename
self.stat1 = None
self.stat2 = None
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Dynamically load a JavaScript file
...rary.js", type: "text/javascript"});
The problem here is that we do not know when the external script file is fully loaded.
We often want our dependant code on the very next line and like to write something like:
if (iNeedSomeMore) {
Script.load("myBigCodeLibrary.js"); // includes code for ...
Using os.walk() to recursively traverse directories in Python
..._recurse(self, parent_path, file_list, prefix, output_buf, level):
if len(file_list) == 0 \
or (self.max_level != -1 and self.max_level <= level):
return
else:
file_list.sort(key=lambda f: os.path.isfile(os.path.join(parent_path, f)))
...
How to find out what type of a Mat object is with Mat::type() in OpenCV
I am kind of confused with type() method of Mat object in OpenCV. If I have following lines:
6 Answers
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