大约有 11,000 项符合查询结果（耗时：0.0325秒） [XML]
What is the best way to compare floats for almost-equality in Python?
...
Python 3.5 adds the math.isclose and cmath.isclose functions as described in PEP 485.
If you're using an earlier version of Python, the equivalent function is given in the documentation.
def isclose(a, b, rel_tol=1e-09, abs...
How to add property to a class dynamically?
... tree out of __getattribute__.
When I ask for foo.b in the example above, Python sees that the b defined on the class implements the descriptor protocol—which just means it's an object with a __get__, __set__, or __delete__ method. The descriptor claims responsibility for handling that attribute...
Do spurious wakeups in Java actually happen?
... spurious wakeups has this tidbit:
The pthread_cond_wait() function in Linux is implemented using the futex system call. Each blocking system call on Linux returns abruptly with EINTR when the process receives a signal. ... pthread_cond_wait() can't restart the waiting because it may miss a real...
Rename Files and Directories (Add Prefix)
...
Some systems have a util-linux utility called "rename" which works differently (on Ubuntu it's called "rename.ul").
– Paused until further notice.
Jan 24 '11 at 23:07
...
Python Threading String Arguments
I have a problem with Python threading and sending a string in the arguments.
2 Answers
...
How to truncate the time on a DateTime object in Python?
What is a classy way to way truncate a python datetime object?
16 Answers
16
...
Append a dictionary to a dictionary [duplicate]
... Though, I just ran a quick empirical test with timeit on the standard CPython (2.7), and dict(**orig) is slightly faster. YMMV, and it depends on your implementation--but I'm not entirely sure the ** idiom in this case really does incur extra overhead in all implementations, perhaps because dict...
Does reading an entire file leave the file handle open?
...
The answer to that question depends somewhat on the particular Python implementation.
To understand what this is all about, pay particular attention to the actual file object. In your code, that object is mentioned only once, in an expression, and becomes inaccessible immediately aft...
ValueError: numpy.dtype has the wrong size, try recompiling
I just installed pandas and statsmodels package on my python 2.7
When I tried "import pandas as pd", this error message comes out.
Can anyone help? Thanks!!!
...
Dictionaries and default values
Assuming connectionDetails is a Python dictionary, what's the best, most elegant, most "pythonic" way of refactoring code like this?
...