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Get Image size WITHOUT loading image into memory
...cstring for .open says:
def open(fp, mode="r"):
"Open an image file, without loading the raster data"
There are a few file operations in the source like:
...
prefix = fp.read(16)
...
fp.seek(0)
...
but these hardly constitute reading the whole file. In fact .open simply returns a file...
Extending the User model with custom fields in Django
What's the best way to extend the User model (bundled with Django's authentication app) with custom fields? I would also possibly like to use the email as the username (for authentication purposes).
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How to check if an object is a generator object in python?
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edited Sep 6 '11 at 18:20
answered Jun 20 '11 at 19:46
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When to use enumerateObjectsUsingBlock vs. for
...o use and comes more naturally in the context.
While for(... in ...) is quite convenient and syntactically brief, enumerateObjectsUsingBlock: has a number of features that may or may not prove interesting:
enumerateObjectsUsingBlock: will be as fast or faster than fast enumeration (for(... in ......
_DEBUG vs NDEBUG
...n appropriate, ie _DEBUG if you want your debugging code to be consistent with the MS CRT debugging techniques and NDEBUG if you want to be consistent with assert().
If you define your own debugging macros (and you don't hack the compiler or C runtime), avoid starting names with an underscore, as t...
MySQL Removing Some Foreign keys
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edited Nov 7 '17 at 13:03
Willi Mentzel
18.6k1212 gold badges7979 silver badges9393 bronze badges
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How to get parameters from a URL string?
... $query);
echo $query['email'];
If you want to get the $url dynamically with PHP, take a look at this question:
Get the full URL in PHP
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Debugging in Clojure? [closed]
...jure.tools.trace)
And you need to add the ^:dynamic to the function definition
(defn ^:dynamic fib[n] (if (< n 2) n (+ (fib (- n 1)) (fib (- n 2)))))
Then Bob is once again your uncle:
(clojure.tools.trace/dotrace [fib] (fib 3))
TRACE t4328: (fib 3)
TRACE t4329: | (fib 2)
TRACE t4330: | | ...
How to exit from Python without traceback?
I would like to know how to I exit from Python without having an traceback dump on the output.
10 Answers
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Random string generation with upper case letters and digits
...wer in one line:
''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(N))
or even shorter starting with Python 3.6 using random.choices():
''.join(random.choices(string.ascii_uppercase + string.digits, k=N))
A cryptographically more secure version; see https://stackover...