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How can I compare two lists in python and return matches
I want to take two lists and find the values that appear in both.
19 Answers
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How does collections.defaultdict work?
I've read the examples in python docs, but still can't figure out what this method means. Can somebody help? Here are two examples from the python docs
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Understanding dict.copy() - shallow or deep?
...w copy of the dictionary. Same goes for the book I am following (Beazley's Python Reference), which says:
7 Answers
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Why does installing Nokogiri on Mac OS fail with libiconv is missing?
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Failed for me on 10.10.3. Xcode 6.3 with libxml2 version 2.6.21 or later is required!.
– Rivera
May 11 '15 at 13:56
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What is pip's equivalent of `npm install package --save-dev`?
...ject with an existing requirements.txt, installing all requirements (I use Python3.7 but you can remove the --three if you do not) is as simple as:
pipenv --three install
Activating the virtualenv to run commands is also easy
pipenv shell
Installing requirements will automatically update the P...
Format output string, right alignment
...d here's how to do it using the old % syntax (useful for older versions of Python that don't support str.format):
line_new = '%12s %12s %12s' % (word[0], word[1], word[2])
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Shared-memory objects in multiprocessing
...es (even over a network).
The Manager approach can be used with arbitrary Python objects, but will be slower than the equivalent using shared memory because the objects need to be serialized/deserialized and sent between processes.
There are a wealth of parallel processing libraries and approaches...
Code formatting shortcuts in Android Studio for Operation Systems
...ge below:
In Android studio 3.5, there is problem with rearranging the xml code, it also rearrange the views as well, so need to use these settings first.
Settings -> Editor -> Code Style -> XML-> Set From -> Predefined Style > Android.
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SQLAlchemy IN clause
...rnative way is using raw SQL mode with SQLAlchemy, I use SQLAlchemy 0.9.8, python 2.7, MySQL 5.X, and MySQL-Python as connector, in this case, a tuple is needed. My code listed below:
id_list = [1, 2, 3, 4, 5] # in most case we have an integer list or set
s = text('SELECT id, content FROM myTable W...
How to prevent errno 32 broken pipe?
Currently I am using an app built in python. When I run it in personal computer, it works without problems.
4 Answers
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