大约有 30,000 项符合查询结果（耗时：0.0624秒） [XML]
multiprocessing.Pool: When to use apply, apply_async or map?
...
Back in the old days of Python, to call a function with arbitrary arguments, you would use apply:
apply(f,args,kwargs)
apply still exists in Python2.7 though not in Python3, and is generally not used anymore. Nowadays,
f(*args,**kwargs)
is pr...
Does python have an equivalent to Java Class.forName()?
... string argument and create an object of the class named in that string in Python. In Java, I would use Class.forName().newInstance() . Is there an equivalent in Python?
...
How to set entire application in portrait mode only?
...
For any Android version
From XML
You can specify android:screenOrientation="portrait" for each activity in your manifest.xml file. You cannot specify this option on the application tag.
From Java
Other option is to do it programmatically, for example ...
Standard way to embed version into python package?
Is there a standard way to associate version string with a python package in such way that I could do the following?
17 Ans...
How can I get list of values from dict?
How can I get a list of the values in a dict in Python?
5 Answers
5
...
Creating a singleton in Python
...any religious wars, but to discuss how this pattern is best implemented in Python in such a way that is most pythonic. In this instance I define 'most pythonic' to mean that it follows the 'principle of least astonishment' .
...
How to validate a url in Python? (Malformed or not)
...
A True or False version, based on @DMfll answer:
try:
# python2
from urlparse import urlparse
except:
# python3
from urllib.parse import urlparse
a = 'http://www.cwi.nl:80/%7Eguido/Python.html'
b = '/data/Python.html'
c = 532
d = u'dkakasdkjdjakdjadjfalskdjfalk'
def ...
Lazy Method for Reading Big File in Python?
...t specify whether he was reading textual or binary data. But if he's using python 2.7 on Windows and is reading binary data, it is certainly worth noting that if he forgets the 'b' his data will very likely be corrupted. From the docs - Python on Windows makes a distinction between text and binary f...
Python unittest - opposite of assertRaises?
...code you would raise a KeyError, that would be an error, not a failure. In python - differently than some other languages - Exceptions are routinely used for control flow, this is why we have the except <ExceptionName> syntax indeed. To that regard, user9876's solution is simply wrong.
...
Reducing Django Memory Usage. Low hanging fruit?
...Make sure you are not keeping global references to data. That prevents the python garbage collector from releasing the memory.
Don't use mod_python. It loads an interpreter inside apache. If you need to use apache, use mod_wsgi instead. It is not tricky to switch. It is very easy. mod_wsgi is way e...