大约有 11,000 项符合查询结果（耗时：0.0267秒） [XML]
Check if object is file-like in Python
File-like objects are objects in Python that behave like a real file, e.g. have a read() and a write method(), but have a different implementation. It is and realization of the Duck Typing concept.
...
How do I create a multiline Python string with inline variables?
I am looking for a clean way to use variables within a multiline Python string. Say I wanted to do the following:
7 Answers...
cv2.imshow command doesn't work properly in opencv-python
I'm using opencv 2.4.2, python 2.7
The following simple code created a window of the correct name, but its content is just blank and doesn't show the image:
...
R: rJava package install failing
... Nothing worked for me. I am trying to install "rJava" in the Red Hat Linux server where I am serving some R Shiny applications. I am getting the following ERROR: configuration failed for package ‘rJava’ * removing ‘/usr/lib64/R/library/rJava’. I have done the following steps in the pro...
What __init__ and self do on Python?
I'm learning the Python programming language and I've came across something I don't fully understand.
18 Answers
...
Extracting extension from filename in Python
...
Yes. Use os.path.splitext(see Python 2.X documentation or Python 3.X documentation):
>>> import os
>>> filename, file_extension = os.path.splitext('/path/to/somefile.ext')
>>> filename
'/path/to/somefile'
>>> file_exte...
How do I get list of methods in a Python class?
...gt;>> from optparse import OptionParser
>>> import inspect
#python2
>>> inspect.getmembers(OptionParser, predicate=inspect.ismethod)
[([('__init__', <unbound method OptionParser.__init__>),
...
('add_option', <unbound method OptionParser.add_option>),
('add_opti...
How to invoke the super constructor in Python?
...ith the super constructor is invoked implicitly. How does one invoke it in Python? I would expect super(self) but this doesn't work.
...
Programmatically generate video or animated GIF in Python?
... each frame but a fixed frame rate would be fine too. I'm doing this in wxPython, so I can render to a wxDC or I can save the images to files, like PNG. Is there a Python library that will allow me to create either a video (AVI, MPG, etc) or an animated GIF from these frames?
...
Is there a standardized method to swap two variables in Python?
In Python, I've seen two variable values swapped using this syntax:
7 Answers
7
...