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python design patterns [closed]
...examples of Best Practices, Design patterns and the SOLID principles using Python.
6 Answers
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Why do people write the #!/usr/bin/env python shebang on the first line of a Python script?
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If you have several versions of Python installed, /usr/bin/env will ensure the interpreter used is the first one on your environment's $PATH. The alternative would be to hardcode something like #!/usr/bin/python; that's ok, but less flexible.
In Unix, an e...
Python 3 turn range to a list
...ing to write/read, so I'm attempting to make a list with a range in it. In Python 2 it seems that:
8 Answers
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Examples of GoF Design Patterns in Java's core libraries
...hich in turn can be used to create another abstract/interface type)
javax.xml.parsers.DocumentBuilderFactory#newInstance()
javax.xml.transform.TransformerFactory#newInstance()
javax.xml.xpath.XPathFactory#newInstance()
Builder (recognizeable by creational methods returning the instance itself)
ja...
List comprehension vs map
...? Is either of them generally more efficient or considered generally more pythonic than the other?
11 Answers
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java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet
... - I was confused to see even after adding the proper dependency in my pom.xml didn't solved the error until I followed as above..
– srinivas
Mar 10 '16 at 6:37
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Should one call .close() on HttpServletResponse.getOutputStream()/.getWriter()?
...t this servlet. It throws an exception. The exception is mapped in the web.xml to an error JSP:
package ser;
import java.io.*;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
@WebServlet(name = "Erroneous", urlPatterns = {"/Erroneou...
Threading in a PyQt application: Use Qt threads or Python threads?
...nchrnous signals/slots, event loop, etc.).
Also, you can't use Qt from a Python thread (you can't for instance
post event to the main thread through QApplication.postEvent): you
need a QThread for that to work.
A general rule of thumb might be to use QThreads if you're going to interact s...
How do I check what version of Python is running my script?
How can I check what version of the Python Interpreter is interpreting my script?
21 Answers
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Is Python interpreted, or compiled, or both?
... there are C interpreters and projects that attempt to compile a subset of Python to C or C++ code (and subsequently to machine code).
Second, compilation is not restricted to ahead-of-time compilation to native machine code. A compiler is, more generally, a program that converts a program in one p...