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Python subprocess.Popen “OSError: [Errno 12] Cannot allocate memory”
... that every time you call it you're requesting once more as much memory as Python is already eating up, i.e. in the hundreds of additional MB, all in order to then exec a puny 10kB executable such as free or ps. In the case of an unfavourable overcommit policy, you'll soon see ENOMEM.
Alternatives...
How do I get a string format of the current date time, in python?
...
You can use the datetime module for working with dates and times in Python. The strftime method allows you to produce string representation of dates and times with a format you specify.
>>> import datetime
>>> datetime.date.today().strftime("%B %d, %Y")
'July 23, 2010'
>...
WSGI vs uWSGi with Nginx [closed]
...WSGI (do not confuse the uwsgi protocol with the uWSGI server). WSGI is a Python specification. There are several implementations of the WSGI specification and it's intended to be used for more than just application servers/web servers, but there are quite a few WSGI application servers (ie. Cherr...
What are the differences between json and simplejson Python modules?
...nce json was added in 2.6, simplejson has the advantage of working on more Python versions (2.4+).
simplejson is also updated more frequently than Python, so if you need (or want) the latest version, it's best to use simplejson itself, if possible.
A good practice, in my opinion, is to use one or...
How to remove padding around buttons in Android?
...e: android:button="@drawable/toggle_selector"
Below is my toggle_selecter.xml file
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/notifications_toggle_on"
...
Getting the name of a variable as a string
This thread discusses how to get the name of a function as a string in Python:
How to get a function name as a string?
23 ...
What does 'wb' mean in this code, using Python?
...le in binary mode, so
there are also modes like 'rb', 'wb',
and 'r+b'. Python on Windows makes a
distinction between text and binary
files; the end-of-line characters in
text files are automatically altered
slightly when data is read or written.
This behind-the-scenes modification to
...
How to use glob() to find files recursively?
...se pathlib.Path.rglob from the the pathlib module, which was introduced in Python 3.5.
from pathlib import Path
for path in Path('src').rglob('*.c'):
print(path.name)
If you don't want to use pathlib, use can use glob.glob('**/*.c'), but don't forget to pass in the recursive keyword parameter ...
How to convert JSON data into a Python object
I want to use Python to convert JSON data into a Python object.
21 Answers
21
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Spring ApplicationContext - Resource leak: 'context' is never closed
...) method and can be used in a try-with-resources statement.
try (ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("META-INF/userLibrary.xml")) {
service = context.getBean(UserLibrary.class);
}
Whether you actually need to create this context is a different question (y...