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How to use filter, map, and reduce in Python 3
... longer return lists:
[...]
map() and filter() return iterators. If you really need a list, a quick fix is e.g. list(map(...)), but a better fix is often to use a list comprehension (especially when the original code uses lambda), or rewriting the code so it doesn’t need a list at all. Particular...
Received fatal alert: handshake_failure through SSLHandshakeException
... server's certificate is probably not trusted by the client. This would usually result in a more verbose error, but it is quite possible. Usually the fix is to import the server's CA certificate into the client's trust store.
The cerificate is issued for a different domain. Again, this would have re...
How to print without newline or space?
...to the end of the string:
print('.', end='')
To not add a space between all the function arguments you want to print:
print('a', 'b', 'c', sep='')
You can pass any string to either parameter, and you can use both parameters at the same time.
If you are having trouble with buffering, you can f...
How do you generate dynamic (parameterized) unit tests in python?
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This is called "parametrization".
There are several tools that support this approach. E.g.:
pytest's decorator
parameterized
The resulting code looks like this:
from parameterized import parameterized
class TestSequence(unittes...
Relative imports in Python 3
...ython3.
The simplest fix for this case, assuming the name mymodule is globally unique, would be to avoid using relative imports, and just use...
from mymodule import as_int
...although, if it's not unique, or your package structure is more complex, you'll need to include the directory containing...
Getting a list of all subdirectories in the current directory
Is there a way to return a list of all the subdirectories in the current directory in Python?
27 Answers
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How to join components of a path when you are constructing a URL in Python
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Specifically once I have that the prefix has to ends in / and that the target path can't begin in / I might as well just concatenate. In this case I am not sure if urljoin is really helping?
– amjoconn
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Convert sqlalchemy row object to python dict
...of a SQLAlchemy object, like the following::
for u in session.query(User).all():
print u.__dict__
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Is it possible to import a whole directory in sass using @import?
...rails/sass-rails, features glob importing.
@import "foo/*" // import all the files in the foo folder
@import "bar/**/*" // import all the files in the bar tree
To answer the concern in another answer "If you import a directory, how can you determine import order? There's no way that doesn't...
Among $_REQUEST, $_GET and $_POST which one is the fastest?
...what my application should do (i.e. one or the other, but not both) : generally speaking :
You should use $_GET when someone is requesting data from your application.
And you should use $_POST when someone is pushing (inserting or updating ; or deleting) data to your application.
Either way, the...