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Print current call stack from a method in Python code
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Here's an example of getting the stack via the traceback module, and printing it:
import traceback
def f():
g()
def g():
for line in traceback.format_stack():
print(line.strip())
f()
# Prints:
# File "so-stack.py", line 10, in <module>
# f()
# File "so-stack....
How to compile a static library in Linux?
...e into a file named out.a. Is it sufficient to simply compile with the command gcc -o out.a out.c ? I'm not quite familiar with gcc , hope anyone can give me a hand.
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How to calculate moving average using NumPy?
... 16.5, 17.5])
So I guess the answer is: it is really easy to implement, and maybe numpy is already a little bloated with specialized functionality.
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What is a higher kinded type in Scala?
...of polymorphism/abstraction. It means the same thing for polymorphic types and values. Concretely, a higher-order abstraction abstracts over something that abstracts over something. For types, the term "higher-kinded" is a special-purpose version of the more general "higher-order".
Thus, the higher-...
Why doesn't django's model.save() call full_clean()?
...matic" validation option which is both simple enough to actually be useful and robust enough to handle all the edge cases is -- if it's even possible -- far more than can be accomplished on the 1.2 timeframe. Hence, for now, Django doesn't have any such thing, and won't have it in 1.2. If you think ...
class
...d
String.value_of 42 # => "42"
This can also be written as a shorthand:
class String
def self.value_of obj
obj.to_s
end
end
Or even shorter:
def String.value_of obj
obj.to_s
end
When inside a function definition, self refers to the object the function is being called with. ...
Difference between JSON.stringify and JSON.parse
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JSON.stringify turns a JavaScript object into JSON text and stores that JSON text in a string, eg:
var my_object = { key_1: "some text", key_2: true, key_3: 5 };
var object_as_string = JSON.stringify(my_object);
// "{"key_1":"some text","key_2":true,"key_3":5}"
typeof(objec...
How to create a video from images with FFmpeg?
... constant frame rate. See Create a video slideshow from images – FFmpeg, and this What is the (technical) difference between -r and the fps filter?. So using -r parameter sometimes couse skipping first image..
– khan
Nov 6 '14 at 17:55
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Python - abs vs fabs
...n (if it can't, it throws an exception). It then takes the absolute value, and returns the result as a float.
In addition to floats, abs() also works with integers and complex numbers. Its return type depends on the type of its argument.
In [7]: type(abs(-2))
Out[7]: int
In [8]: type(abs(-2.0))
Out...
How to save an image locally using Python whose URL address I already know?
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with urlretrieve I just get a 1KB file with a dict and 404 error text inside.Why? If I enter url into my browser I can get the picture
– Yebach
Oct 29 '14 at 12:20
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