大约有 9,000 项符合查询结果（耗时：0.0292秒） [XML]
Convert columns to string in Pandas
...me potentially nasty bugs.
Challenging to differentiate strings and other python objects
Another obvious example example is that it's harder to distinguish between "strings" and "objects". Objects are essentially the blanket type for any type that does not support vectorizable operations.
Consider,...
Argparse: Required arguments listed under “optional arguments”?
...ere is a non-optional argument, which I find very confusing. How can I get python to indicate that an argument is not optional?
...
What does it mean to “program to an interface”?
... used as a poor mechanism for defining interfaces (for example, in regular Python you do it all the time).
– Carlos H Romano
Aug 9 '15 at 15:37
...
What exactly is Type Coercion in Javascript?
...
In Python if you try to add, say, strings and integers, you get an error:
>>> "hi" + 10
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: cannot concatenate 'str' and 'int'...
Is there a typical state machine implementation pattern?
...e with code. A Java implementation (pre Java8) is discussed. I was shown a Python example on GitHub as well.
share
|
improve this answer
|
follow
|
...
Add a prefix to all Flask routes
...
This is more of a python answer than a Flask/werkzeug answer; but it's simple and works.
If, like me, you want your application settings (loaded from an .ini file) to also contain the prefix of your Flask application (thus, not to have the va...
What is a 'Closure'?
...s a function that can reference state in another function. For example, in Python, this uses the closure "inner":
def outer (a):
b = "variable in outer()"
def inner (c):
print a, b, c
return inner
# Now the return value from outer() can be saved for later
func = outer ("test")
...
Image Processing: Algorithm Improvement for 'Coca-Cola Can' Recognition
...Features (SURF).
You can find a nice OpenCV code example in Java, C++, and Python on this page: Features2D + Homography to find a known object
Both algorithms are invariant to scaling and rotation. Since they work with features, you can also handle occlusion (as long as enough keypoints are visible)...
Does “untyped” also mean “dynamically typed” in the academic CS world?
...er dialects of Lisp, Smalltalk, and most scripting languages such as Perl, Python, and Ruby. Note, however, that an untyped language does not necessarily allow programs to corrupt data—this just means that all safety checking is performed at execution time. […]
[link] (note: bolding in origina...
How to force the browser to reload cached CSS/JS files?
...k.
It parses HTML on its way out of the webserver (works with PHP, rails, python, static HTML -- anything) and rewrites links to CSS, JS, image files so they include an id code. It serves up the files at the modified URLs with a very long cache control on them. When the files change, it automatic...