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Concatenating two lists - difference between '+=' and extend()
I've seen there are actually two (maybe more) ways to concatenate lists in Python:
One way is to use the extend() method:
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How to fix “Attempted relative import in non-package” even with __init__.py
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Yes. You're not using it as a package.
python -m pkg.tests.core_test
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Understanding the difference between __getattr__ and __getattribute__
...es which it doesn't explicitly manage and do that via __getattr__ method.
Python will call this method whenever you request an attribute that hasn't already been defined, so you can define what to do with it.
A classic use case:
class A(dict):
def __getattr__(self, name):
return self[...
Change File Extension Using C#
I have many file types: pdf, tiff, jpeg, bmp. etc.
My question is how can I change file extension?
I tried this:
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Learning Ruby on Rails
...ment with Rails; both books have been excellent.
Peepcode screencasts and PDF books have also been great for getting started; at $9 per screencast it's hard to go wrong. I actually bought a 5-pack.
Also check out the following:
Official Rails Guides
Railscasts
railsapi.com or Ruby on Rails - AP...
AttributeError(“'str' object has no attribute 'read'”)
In Python I'm getting an error:
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Checking if sys.argv[x] is defined
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I love Python more and more, all thanks to answers like that and Stack Overflow of course! Too bad we don't have an explanation of last two lines. I believe for beginners that would be great.
– Goujon
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How to use subprocess popen Python
... that, your argument doesn't make sense at all. Many OS functions that the Python standard library exposes are potentially dangerous - take shutil.rmtree for example. But that has nothing to do with whether they are included in the stdlib or not. I believe the UNIX philosophy of "Unix was not design...
Saving a Numpy array as an image
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You can use PyPNG. It's a pure Python (no dependencies) open source PNG encoder/decoder and it supports writing NumPy arrays as images.
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unbound method f() must be called with fibo_ instance as first argument (got classobj instance inste
In Python, I'm trying to run a method in a class and I get an error:
8 Answers
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