When we create python functions, sometimes we do not need to define python functions explicitly, and it is more convenient to pass them into anonymous functions directly. This saves us the trouble of trying to name functions, and we can also write less code. Many programming languages provide this feature. The so-called anonymity means that …
For various reasons, we will need to install many versions of Python interpreter under the same operating system. We may also need different versions of same module for various reasons in one Python project. This causes a lot of confusion in Python environment management. Usually, different Python interpreters and dependency libraries are required for each …
Usually in Python, we use multi-threading or multi-processing to implement concurrent programming. Computing-intensive tasks for cpu are usually implemented by multi-processor because of GIL, while io-intensive tasks can be scheduled by threads to allow threads to relinquish GIL while performing io tasks, thus achieving superficial concurrency.
Python requests module is a http client library, which is similar to urllib and urllib2. It is more convenient than urllib and can save us a lot of work.
1. The Definition Of Swift Closures. Closures are described in the Swift development documentation as functional independent modules that can be passed and referenced in your code. Closures in Swift are similar to blocks in C and Objective-C, as well as anonymous functions in other programming languages. Closures are primarily designed to capture and store …
String interpolation is a way to construct new strings that contain constants, variables, literals, and expressions. Each entry of the string literal you inserted is wrapped in parentheses prefixed by a backslash: let x = 3 let str = “\(x) * 5 = \(Double(x) * 5)” print(str) Below is above code execution result. 3 * …
The json library can parse JSON from strings or files. The library parses JSON format string and turns it into a Python dictionary or list. It can also convert Python dictionaries or lists to JSON string.
1. Use “+” Operator To Merge List Directly. >>> list_1 = [‘java’,’python’,’mysql’] >>> >>> list_2 = [100, 99, 101] >>> >>> print(list_1 + list_2) [‘java’, ‘python’, ‘mysql’, 100, 99, 101] >>> >>> print(list_2 + list_1) [100, 99, 101, ‘java’, ‘python’, ‘mysql’] >>> 2. Use List’s extend Method. The list’s extend method will extend current list …
This article list some python tricks you may use in python development. It is very useful for you to understand python coding.
1. Variable Scope. Generally, variables defined outside of the function are called global variables, and variables defined inside the function are called local variables. Global variables are available in all scopes, and local variables are only available in it’s definition function. The order that different scope variables are called is local variable first, then global …
