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How to “comment-out” (add comment) in a batch/cmd?
I have a batch file that runs several python scripts that do table modifications.
10 Answers
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Object of custom type as dictionary key
What must I do to use my objects of a custom type as keys in a Python dictionary (where I don't want the "object id" to act as the key) , e.g.
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How to overload __init__ method based on argument type?
...ile.close()
...
... # rest of code
The key idea is here is using Python's excellent support for named arguments to implement this. Now, if I want to read the data from a file, I say:
obj.read(filename="blob.txt")
And to read it from a string, I say:
obj.read(str="\x34\x55")
This way ...
Can't access RabbitMQ web management interface after fresh install
...hat just happened to me and caused me some headaches:
I have set up a new Linux RabbitMQ server and used a shell script to set up my own custom users (not guest!).
The script had several of those "code" blocks:
rabbitmqctl add_user test test
rabbitmqctl set_user_tags test administrator
rabbitmqct...
Why is Python 3.x's super() magic?
In Python 3.x, super() can be called without arguments:
1 Answer
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Actual meaning of 'shell=True' in subprocess
...the shell are nontrivial, you now require the reader and maintainer of the Python script (which may or may not be your future self) to understand both Python and shell script. Remember the Python motto "explicit is better than implicit"; even when the Python code is going to be somewhat more complex...
How do I override __getattr__ in Python without breaking the default behavior?
...behaviour
return object.__getattribute__(self, name)
See the Python docs for more.
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In Python, if I return inside a “with” block, will the file still close?
...e the finally block after a try block, i.e. it always executes (unless the python process terminates in an unusual way of course).
It is also mentioned in one of the examples of PEP-343 which is the specification for the with statement:
with locked(myLock):
# Code here executes with myLock hel...
Class constants in python
In python, I want a class to have some "constants" (practically, variables) which will be common in all subclasses. Is there a way to do it with friendly syntax?
Right now I use:
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How to use the pass statement?
I am in the process of learning Python and I have reached the section about the pass statement. The guide I'm using defines it as being a Null statement that is commonly used as a placeholder.
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