大约有 47,000 项符合查询结果（耗时：0.0312秒） [XML]
Calling a function of a module by using its name (a string)
...g a function given a string with the function's name in a Python program. For example, let's say that I have a module foo , and I have a string whose content is "bar" . What is the best way to call foo.bar() ?
...
How to list imported modules?
...
import sys
sys.modules.keys()
An approximation of getting all imports for the current module only would be to inspect globals() for modules:
import types
def imports():
for name, val in globals().items():
if isinstance(val, types.ModuleType):
yield val.__name__
This w...
How does the @property decorator work in Python?
...nt('Get!')
...
>>> def setter(self, value): print('Set to {!r}!'.format(value))
...
>>> def deleter(self): print('Delete!')
...
>>> prop = property(getter)
>>> prop.fget is getter
True
>>> prop.fset is None
True
>>> prop.fdel is None
True
Ne...
How to initialize a private static const map in C++?
...
+1 for simplicity, of course using a Boost.Assign like design is pretty neat too :)
– Matthieu M.
Apr 14 '10 at 11:33
...
How to smooth a curve in the right way?
...imate the point in the center of the window. Finally the window is shifted forward by one data point and the process repeats. This continues until every point has been optimally adjusted relative to its neighbors. It works great even with noisy samples from non-periodic and non-linear sources.
Here...
Log exception with traceback
... except: handler/block to log the current exception along with the trace information, prepended with a message.
import logging
LOG_FILENAME = '/tmp/logging_example.out'
logging.basicConfig(filename=LOG_FILENAME, level=logging.DEBUG)
logging.debug('This message should go to the log file')
try:
...
Extracting bits with a single multiplication
... simple example of getting a single byte manipulated. Using unsigned 8 bit for simplicity. Imagine your number is xxaxxbxx and you want ab000000.
The solution consisted of two steps: a bit masking, followed by multiplication. The bit mask is a simple AND operation that turns uninteresting bits to z...
Generate a heatmap in MatPlotLib using a scatter data set
... title, axis labels, etc. and then do the normal savefig() like I would do for any other typical matplotlib plot.
– gotgenes
Jul 15 '11 at 19:19
...
How to log a method's execution time exactly in milliseconds?
...
@Tony you forgot the @, NSLog(@"executionTime = %f", executionTime);
– John Riselvato
Apr 18 '13 at 18:30
6
...
Is there a math nCr function in python? [duplicate]
..., ('a', 'd'), ('b', 'c'), ('b', 'd'), ('c', 'd')]
>>> [''.join(x) for x in itertools.combinations('abcd',2)]
['ab', 'ac', 'ad', 'bc', 'bd', 'cd']
If you just need to compute the formula, use math.factorial:
import math
def nCr(n,r):
f = math.factorial
return f(n) / f(r) / f(n-r)
...