Python

1 indentationerror:expected an indented blockThe Python language is a language that is very sensitive to indentation, confusing to many beginners, and even a very experienced Python programmer can be caught in a trap. The most common scenario is

#-*-Coding:utf-8-*-#定义一个字符串Stra ="Str123ab"Print Stra Result: str123ab#定义一个元祖Tupleb = (' str ',1,2,3,' A ',' B ') Print Tupleb results: (' str ',1,2,3,' A ',' B ')#定义一个列表LISTC = [' str ',1,2,3,' A ',' B ']print LISTC Results: [' str ',1,2,3,' A ','

Contacted Ruby and found it has a package management tool Rubygem is very useful and has a very complete documentation system Http://rdoc.infoDiscovery Python also has the same tools, including Easy_install and Pip. Just, I did not examine the

D = {' Adam ':}def, ' Lisa ': $, ' Bart ': generate_tr (name, score): if score %S%s '% (name, score) return ' %s%s '% (name, score) TDS = [Generate_tr (name,score) for name, score in D.iteritems ()]print ' ' print ' namescore ' print ' \ n '.

Os.path.abspath (Path) #返回绝对路径os. Path.basename (Path) #返回文件名os. Path.commonprefix (list) #返回list (multiple paths), The longest path common to all path. Os.path.dirname (Path) #返回文件路径os. Path.exists (path)   #路径存在则返回True, path corruption returned

Dictionary sort1. Sort by key, forward sort1 Sorted (Dic.items (), key=Lambda d:d[0])2. Sort by value, reverse sortSorted (Dic.items (), key=Lambda d:d[1],reverse=true)3. After sorting the original Dictionay unchanged, if you want to use the

http://blog.csdn.net/pipisorry/article/details/45771045Python built-in functionsEnumeration function Enumerate >>> List (Enumerate (' abc ')) [(0, ' a '), (1, ' B '), (2, ' C ')] The enumerate function can also receive a second

1.abs () function >>> ABS ( -1) 1>>> abs (1+2J) 2.23606797749979 The ABS function usually returns the absolute value, while the plural uses ABS to return (A+BJ) A and B squared and then take the square root, as shown above 2.pow () and Math.pow ()

1. Code Conversion General hard disk storage is utf-8, read into in-memory Unicode, and how they are convertedA = ' hello ' \xe4\xbd\xa0\xe5\xa5\xbd ' b = u ' Hello ' u ' \u4f60\u597d ' A.decode (' utf-8 ') u ' \u4f60\u597d ' (utf-8 format decoded

1, first to the official website http://pypi.python.org/pypi/setuptools download Setuptools.exe file and install2. It is recommended to add D:\Python27\Scripts to the PATH environment variable after installation, and then use the easy_install pip

1 #-*-coding:utf-8-*-2 #author:pete yim3 #date:13-8-224 #Copyright (c) rcsh Systems Incorporated. All rights reserved.5 ImportWin32print6 ImportWin32ui7 fromPILImportImage, Imagewin8 Import_imaging9 Ten # One #Constants for GetDeviceCaps A # - # - #

  The use of configuration files in the program to flexibly configure some parameters is a very common thing, configuration file parsing is not complex, in Python more so, in the official release of the library contains the library to do this thing,

You first need to configure the environment variables for Python.Test for a successful configuration, go to the command line, and enter Python.If the configuration is successful.Go to the third-party library's website to download the installation

Learn about list and tuple in Python List Definition The sequence is the most basic data structure in Python. Each element in the sequence is assigned a number-its position, or index, the first index is 0, the second index is 1, and so on.The list

A: IntroductionParamiko is a module written in the Python language that follows the SSH2 protocol and supports the connection of remote servers in a way that is encrypted and authenticated.Two: Installation1.pycrypto InstallationDownload Link: https:

def isphonenumber (text): #固定电话 If len (text)! =: return False # The number of bits is not enough for I in range (0, 4): if n OT Text[i].isdecimal (): return false # area code not if TEXT[4]! = '-':

1. Generating a directoryFunction prototype:distutils.dir_util. Mkpath (name[, mode=0777, verbose=0, dry_run=0]) from Import Dir_utildir_util.mkpath ("new_dir")2. Deleting a directoryFunction prototype:distutils.dir_util. Remove_tree (directory[,

Small series today to take a look at the basic operation of file files in Python. Now learn to buy first OH:Importing modules: Import OSFirst, we introduce a few common methods:Set Current working directory:Os.chdir ('/tmp ') #设置当前目录为tmp目录To create

Python-shared module code Overview:Share a function module that defines multiple list elements. 1. Create a folder for the Template Edit the nester. py file with the following content: def print_lol(the_list): for each_item in the_list: if

Python reads multiple integers in a row + map () function Parsing In python, the input raw_input can only be read into one number, but sometimes it needs to be read into multiple numbers. What should we do? Two raw_input can be used to read two