Python

1.0X7F00 ErrorCGI script callsNo such file or directory 192.168.91.1--[20/jun/2012 20:00:16] CGI script exit status 0x7f001.1 Python environment variable declarationThe environment variable is usually set1.2 Editor Settings Python line wrapping

the so-called factory function means that these built-in functions are class objects, and when you call them, you actually create a class instance.  Factory Function:int (), long (), float (), complex (), BOOL ()str (), Unicode (), basestring ()List

Filename= ' G:\data\iris.csv 'Lines=fr.readlines ()Mat=zeros (Len (lines), 4)Irislabels=[]Index=0For line in lines:Line=line.strip ()If Len (line) >0:Listfromline=line.split (', ')Irislabels.append

Function: String.Join ()Python has join () and Os.path.join () two functions, which work as follows:Join (): An array of connection strings. Generates a new string from a string, tuple, or element in the list, with the specified character (delimiter)

Using a special method to implement a dictionary#Use a class like dictionary dic[' xx ' with brackets in#Brief IntroductionclassFoo:#method called by the ① object [xx] def __getitem__(self, item):return 'GetItem' #② Object [XX] = method called

Use the Python built-in functions: Bin (), Oct (), int (), Hex () to enable a binary conversion.Let's look at the description of these built-in functions in the official Python document:Bin (x)Convert an integer number to a binary string. The result

A series of valuable references to Python/python-related thingshttp://www.path8.net/tn/archives/6017Tools pycharm– Powerful IDE from JetBrains Python Tools for Visual Studio Eclipse + Pydev Aptana Emacs bpython–

Text1. String: Universal string manipulation2. Re: Regular expression operation3. Difflib: Difference Calculation tool4. TextWrap: Text Fill5. Unicodedata:unicode Character Database6. Stringprep: Internet String Preparation Tool7. Readline:gnu read

Recently, we need to do an anti-crawler and machine spider puzzle, feeling confused, a bit impossible to start, rather, directly with Python to write a spiner understand its various principles, and then do not later Ah, so immediately to write a

If we need to get the dictionary value, we have two methods, one is through dict[' key ', and the other is the Dict.get () method.What we are sharing today is the dictionary's Get () method.Here we can use a dictionary to make a small game, assuming

One, threadMultitasking can be done by multiple processes, or it can be done by a multi-thread within a process, all threads within a process, sharing the same block memory in Python to create a thread is simpler, import the threading module, and

Iv. Process Control 在这块，Python与其它大多数语言有个非常不同的地方，Python语言使用缩进块来表示程序逻辑（其它大多数语言使用大括号等）。例如：If age print("你不能买酒。")print("不过你能买口香糖。")Print ("This sentence is outside of the IF statement block.) ”) 这个代码相当于c语言的：if (age

First, iterators and generators1. iteratorsIterators are a way to access the elements of a collection. The iterator object is accessed from the first element of the collection until all of the elements have been accessed and finished. Iterators can

In Python, you can call a function based on a string: 1. Use GetAttr to invoke a function from a string In a multi-process, it is possible to pass over a string, then how can I invoke an already existing function, mainly to use the function of the

Python code crawling Guide (required), python I have been learning python recently. This is really a very short and concise language. I like the language that is supported by powerful function libraries. However, I encountered a headache about

Deeply parse the thread synchronization method in Python and parse the python Thread Synchronization Synchronous access to shared resources When using threads, a very important issue is to avoid access conflicts between multiple threads on the same

Summary of the Python version solution for the maximum K number problem, and the python Solution The TopK problem is to find the maximum number of K. This problem is very common, for example, to find the top 10 keywords from 10 million search

Several methods for analyzing the python program running time, python program running I have seen handwriting at the earliest, similar to the following: 1 import datetime 2 3 def time_1(): 4 begin = datetime.datetime.now() 5 sum = 0 6

In-depth analysis of the usage of the super keyword in Python programming, pythonsuper There are not many definitions about super in the official document. It generally means that a proxy object is returned so that you can call some inherited

The example explains the things that should be paid attention to when using the function closure of Python, and the example explains python Yesterday, just as I used a finger to press the keyboard and coding in the dark, I was asked a question, and