!" "}Return Json.dumps (res, ensure_ascii=false)Server.run (port=8989,debug=true) #启动服务, this need to note that after starting the service if the modified script to run a direct restart, you can not click the right button again to run, otherwise the interface conflict will be reported, because the original running service does not stop5 modifying ExcelImport xlrdFrom xlutils import Copy #修改excel需要导入该模块Book1 = Xlrd.open_workbook (' Ex.xls ') #1, open the original ExcelNew_book = Copy.copy (Book1)
tools.Configuration Anaconda: Enter sublime text-> preferences, package settings-> Anaconda, Settings-default, select Settings-defa Ult option, search for "Python_interpreter" key, then change the key value, the key value is the path of Python (terminal input which Python view Mac with
Python day 9 (6) debugging, pythonday
The probability that the program can be written and run normally at a time is very small, basically no more than 1%. There will always be various bugs to be corrected. Some bugs are very simple. You can see the error information. Some bugs are very complicated. We need to know which variables are correct and which variables are wrong when an error occurs. Therefore, A c
to complete a single step, but to describe the behavior of something in the whole process of solving the problem.For example, the process-oriented design is the first step in the analysis of the problem: 1, start the game, 2, Sunspot first go, 3, draw the screen, 4, Judge Win and lose, 5, turn to white son, 6, draw the screen, 7, Judge Win and lose, 8, return step 2,9, output the final result. The problem
variable, which is actually a variable pointing to the function. A variable can point to a function, and the argument of a function can accept a variable. Then a function can receive another function as a parameter, which is called the higher order function. If you point a python built-in function name to another object, you cannot call the function through the variable name and error. The sample code is as follows: >>> ABS ( -10)10>>> abs in functio
CycleTo calculate 1+2+3, we can write an expression directly:>>> 1 + 2 + 36To calculate 1+2+3+...+10, you can barely write it.However, to calculate 1+2+3+...+10000, it is impossible to write the expression directly.In order for the computer to calculate thousands of repetitions, we need to loop the statements.There are two types of
raise statement because the purpose of capturing the error is simply to record, because the current function does not knowWhat to do with the error, so throwing up is a good way to end up with the top-level caller.Debugging:1. One method is simple and rough, print directly with print ().2. Assert that any use of print () to assist viewing can be overridden by an assertion (assert).3.logging, replace print () with logging is the third way, logging can
; otherwise, it returns None (a null value in Python ).
3-3.Identifier. Why should we avoid double underscores (_) at the beginning and end of the variable name?[Answer]Because the variable name _ xxx _ has a special meaning for Python, this naming style should be avoided for common variables.
knew * what she was doing. */PyErr_SetString (PyExc_SystemError, "NULL object passed to Py_BuildValue"); return v ;}
Example:
The left side is the function call form, and the right side is the returned Python value:
Py_BuildValue("") NonePy_BuildValue("i", 123) 123Py_BuildValue("iii", 123, 456, 789) (123, 456, 789)Py_BuildValue("s", "hello") 'hello'Py_BuildValue("ss", "hello", "world") ('h
, which is actually a variable pointing to the function.A variable can point to a function, and the argument of a function can accept a variable. Then a function can receive another function as a parameter, which is called the higher order function.If you point a python built-in function name to another object, you cannot call the function through the variable name and error. The sample code is as follows:>>> ABS ( -10)10>>> abs in function abs>>>> f
of the sequence.
For example:
#! /Usr/bin/python
Output:
$ Python seq. PY
The Slice operator is a sequence name followed by a square bracket, which contains an optional number and is separated by a colon. Note that this is very similar to the index operator you are using. Remember that numbers are optional, while colons are required.
shoplist[1:3]Returns a
sequence query like a if-elif-else statement or a for loop.As you can see, the solution in Python is more powerful and concise for implementing the same functionality.
4. Conditional expressions (ternary operators)
syntax : X if C else Y
Use the following:>>> x, y =4, 3>>> smaller = x if x
5.while statements
Grammar
While Expression:suite_to_repeat
Counting
defined.Application of arguments: How to use it, but follow the corresponding rules. variable length parameter : variable length worth is the number of arguments is not fixed * number equal to the position parameterVariable length arguments defined by location: *Variable length arguments defined by keyword: * *def func (X,y,*args): #x =1 y=2, args= (3,4,5,6) Tuple formPrint (x, y)Print (args)Func (1,2,3,4,5,6) #实参为位置参数使用 *argsFunc (1,2,* (3,4,5,6)) #等同于 func (1,2,3,4,5,6)D:\
One, Method 1: Single File moduleCopy the file directly to the $python _dir/libSecond, Method 2: Multi-file module, with setup.pyDownload the module package (compressed file zip or tar.gz), unzip, CMD-GT;CD into the module folder, execute:Python setup.py InstallThird, Method 3:easy_install wayDownload ez_setup.py First, run Python ez_setup to install the Easy_ins
passed each time you send a request to a network server. HTTP defines more than 10 odd types of request headers, but most of them are not commonly used. Only the following seven fields are used by most browsers to initialize all network requests (the information in the table is my own browser's data).
When using the Urllib standard library, the classic Python crawler sends the following request headers:
If you are a crawler-guarding webmaster, whic
Python function Programming Guide (3): iterator details, python programming guide
3. iterator
3.1. Iterator Overview
An iterator is a way to access elements in a set. The iterator object is accessed from the first element of the set until all elements are accessed.
The iterator cannot be rolled back and can only be ite
First, prefaceLearn the use of the Python random number module, and use the functions in the module to achieve 6-bit verification code generationIi. Random Module 1, random.random ()Returns 0-1 direct random number, type float>>>print(random.random())0.12591846916629082, Random.randint (1, 8)Returns 1-8 direct random numbers, including 8>>>print(random.randint(1, 8))33, Random.choice ()Randomly fetching ele
Add by ZHJ: For a multi-line string connection, the 6th connection method is convenient and no additional space is added when connecting.Original: http://www.cnblogs.com/bigtreei/p/7892113.html1. PlusFirst, people with programming experience know that many languages use a plus sign to connect two strings, and Python also uses "+" directly to connect two strings;print ' Python ' + ' Tab 'Results:PythontabBac
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