大约有 6,100 项符合查询结果（耗时：0.0301秒） [XML]
Multiline strings in JSON
...ke to have some really long string values split over multiple lines. Using python's JSON module I get a whole lot of errors, whether I use \ or \n as an escape.
...
python requests file upload
I'm performing a simple task of uploading a file using Python requests library. I searched Stack Overflow and no one seemed to have the same problem, namely, that the file is not received by the server:
...
How to run code when a class is subclassed? [duplicate]
...etaclass.
A metaclass is to its class as a class is to its instance.
In Python2 you would define the metaclass of a class with
class SuperClass:
__metaclass__ = Watcher
where Watcher is a subclass of type.
In Python3 the syntax has been changed to
class SuperClass(metaclass=Watcher)
...
How to hide output of subprocess in Python 2.7
I'm using eSpeak on Ubuntu and have a Python 2.7 script that prints and speaks a message:
5 Answers
...
Generate a random letter in Python
Is there a way to generate random letters in Python (like random.randint but for letters)? The range functionality of random.randint would be nice but having a generator that just outputs a random letter would be better than nothing.
...
What does the Ellipsis object do?
...le make up the full number of dimensions in the array).
Interestingly, in python3, the Ellipsis literal (...) is usable outside the slice syntax, so you can actually write:
>>> ...
Ellipsis
Other than the various numeric types, no, I don't think it's used. As far as I'm aware, it was ...
Python None comparison: should I use “is” or ==?
...
@BallpointBen I think the key point is that Python possesses a strong concept of object identity. If you want to check whether an object compares equal to None, by all means use obj == None. If you want to check whether an object is None, use obj is None. The point of ...
Installing Python packages from local file system folder to virtualenv with pip
...roject or package directory before it would work. This tripped me up. docs.python.org/3.6/distutils/sourcedist.html
– Josh
May 16 '18 at 21:04
3
...
Python: Is it bad form to raise exceptions within __init__?
...is incomplete). This is often not the case in scripting languages, such as Python. For example, the following code throws an AttributeError if socket.connect() fails:
class NetworkInterface:
def __init__(self, address)
self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
...
Open files in 'rt' and 'wt' modes
...
Gotcha, it's documented in python3 docs. So, there is basically no difference between wt vs w and rt vs r - just explicit is better than implicit?
– alecxe
Apr 14 '14 at 2:38
...