tkinter tutorial python 3 pdf

Section 1 Python also has a good data type: String 2. A String is a String written in ''or" ". 3. Set the brian variable to" Always look on the bright side of life.! "[Python] # Set the variable brian on line 3! Brian = "Always look on the bright side of life! "Section 2 1 Exercise 1 set the variable caesar to Graham 2

Step One:First, download the compressed files you need on the website at https://files.pythonhosted.org/packages/5e/a0/ Ab7f29e32479d15663eab9afd1deea0a66fc18bf952a5453d77c7b5a92e6/spyder-3.3.0.tar.gzAfter download, unzip directly, no other actionStep Two:Enter cmd after installing SPYDER:WINDOWS+R, enter PIP install Spyder directly after enteringAfter the input is completed, the Spyder will be installed automatically, the screen will prompt a lot of progress bar and code, no tube, wait.The scre

, Range (2, 25)) [5, 7, 11, 13, 17, 19, 23]Map (function, sequence) invokes function (item) for each element and returns the return value as a list. For example, the calculation cube:>>> def Cube (x): Return x*x*x...>>> Map (cube, range (1, 11)) [1, 8, 27, 64, 125, 216, 343, 512, 729, 1000]PyautoguiResources Author Blog: http://my.oschina.net/u/1433482 contact Xu Rongzhong python development Automation test group 113938272 Weibo Http://wei

of the list (extend the original list with a new list) 4 List.index (obj)Find the index position of the first occurrence of a value from the list 5 List.insert (index, obj)Inserting an object into a list 6 List.pop (Obj=list[-1])Removes an element from the list (the last element by default), and returns the value of the element 7 List.remove (obj)To remove the first occurrence of a value in a list 8 L

corresponding to all the keys in the dictionary (default is None);7>, Adict.get (key, default = None) returns the value of key in the dictionary, and returns the value of default if the key does not exist in the dictionary (default defaults to none);8>, Adict.has_key (key) returns True if key is in the dictionary, otherwise false. Now with in, not in;9>, Adict.iteritems (), Adict.iterkeys (), adict.itervalues () are the same as the non-iterative methods they correspond to, but they return an it

the terminating index value location. you can allow only the starting index parameter value to be provided, but not only the terminating index value. (2) Join method The Join method is used primarily for connection strings and can only be used for connection strings. Uses one of the specified characters to concatenate multiple strings and finally returns a new string. multiple strings that need to be connected can be given once in the form of a list or tuple. (

This chapter focuses on three very important data types in Python: List tuple dictionary#-*-Coding:utf-8-*-#1 declarations ListList1 = ["A", "B", "C"]#判断列表中是否存在元素Print ("A" in List1)#追加元素List1.append (123)#迭代输出For I in List1:Print (i)#list长度Print (len (list1))#list中最大的值max最小值minPrint (max ([12,2,3]))#pop--Removes the last value and returns the valuenumbers = [12,32,54,787,24]Print Numbers.pop ()#常用方法: Reverse Sort Remove Insert Count index#2 declaring

The code is as follows Copy Code "Hello World" 1 Creating hello.py 2 Writing Program: if __name__ = = ' __main__ ':print "Hello World" 3 run Program: Python./hello.py Comments 1 Whether it is a line comment or a paragraph comment, it is annotated with a # plus a space. 2 If you need to use the Chinese annotation in your code, you must precede the Pytho