python turtle example

First, the output Hello WorldPrint ("Hello Word")Second, summation operationA1 = input ("A1:"= input ("A2:"= float (A1) + float (A2) Print (" the first number {0} plus the second number {1} and is {2}". Format (a1,a2,sum))Three sides of the input triangle to seek the areaImport= input ("A1:"= input ("A2:" = input ("A3:"= (float (A1) +float (A2) +float (A3))/2D == d* (d-float (A1)) * (D-float (A2)) * (D-float (A3)) b=float (area) c= Math.sqrt (b)print(c)Four, the radius of the input circle, to

1. Output Hello word!Print ("Hello Word")2. Simple interactionName=input (" Enter name:")print("{} Students, learn python, promising!") " . Format (name))3, the user input two numbers, calculate and output two numbers of the sum:A=input ( " Please enter number a:") b=input (" Please enter number B:") c= Float (a) +float (b)print(" number {} plus number {} equals {}". Format (a,b,c))4, the user input triangle three-side length, and calculate the area

Print ("HelloWorld")Name = input ( " Enter name ")print("{} Students, study hard, day up ") . Format (name)) a=input ( " Please enter a: " ) b =input ( " Please enter B: " ) print (float (a) +float (b)) a=input ( " a= " ) b =input ( " b= " ) c =input ( " c= " ) L = (float (a) +float (b) +float (c))/2d = Float (l) * (float (l)-float (a)) * (float (l)-float (b)) * (float (l)-float (c)) s = Float (d) **0.5print (float (s)) R=input (" please input r=") s=3.14*float (r) *float (

1. Hello world!2. Simple Interactive (interactive, file-style) textbook P193, the user input two numbers, calculate and output two numbers of the sum:4, the user input triangle three-side length, and calculate the area of the triangle: (Helen Formula)A=input ("Edge length of triangle a:") b=input ("side length B of the triangle:") C=input ("The edge length of the triangle C:") s=1/2*(float(a) +float(b) +float(c) area= (s* (float(s)-float(a)) *(float(s)-float(b)) *(float(s)-float(c))) **0.5Print

First, the output Hello WorldPrint ("Hello Word")Second, summation operationA1 = Input ("A1:") a2 = Input ("A2:") sum = float (A1) +float (A2) print ("The sum of the first number {0} plus the second number {1} is {2}". Format (a1,a2,sum))Three sides of the input triangle to seek the areaImport MATHA1 = Input ("A1:") a2 = Input ("A2:") a3 = Input ("A3:") p = (float (A1) +float (A2) +float (A3))/2d=float (p) area = d* ( D-float (A1)) * (D-float (A2)) * (D-float (A3)) B=float (area) c=math.sqrt (b)

‐‐‐| ')Print (' |‐‐‐1: Query contact information ‐‐‐| ')Print (' |‐‐‐2: Insert new contact ‐‐‐| ')Print (' |‐‐‐3: Delete existing contact ‐‐‐| ')Print (' |‐‐‐4: Exit Address Book Program ‐‐‐| ')contacts = Dict ()While 1:instr = Int (input (' \ n Please enter the relevant instruction code: '))If InStr = = 1:Name = input (' Please enter contact name: ')If name in Contacts:Print (name + ': ' + contacts[name])ElsePrint (' The name you entered is no longer in the address Book! ‘)If InStr = = 2:Name

1. VariablesIn other programming languages, when a variable is assigned a value to a name, the value is stored in memory, and the name is called a variable.In Python, it's a bit different, it's more like putting a name on top of a value, so you can say that Python has no variables.34= a + bprint (c)2. Places to note when using variables:You need to assign a value to the its first before using the variable.V

1. What is BIFBif is a built-in function, English is all called build-in-function3. Is there a difference between "FISHC" and "FISHC"?There's a difference, he's two different strings.The difference between 4.= and = == Assign a value in Python, that is, assign a value to the variable. = = represents equal to5 What is the meaning of stitching?Stitching can be easily understood in Python as a concatenation of

The practice of Python learningA chess board drawn with turtleImport Turtleturtle.speed a = 30# painting background turtle.up () Turtle.goto ( -10, -10) Turtle.down () Turtle.fillcolor ("Khaki") Turtle.begin_fill () TURTLE.FD (A * 8 +) Turtle.left (+) TURTLE.FD (A * 8 +) Turtle.left (A * 8 +) turtle.fd. Left (TURTLE.FD) (A * 8 +) Turtle.left (All) Turtle.end_fill () #画黑格for I in range (8): If I% 2 = = 0: #偶数行 turtle.u P () Turtle.goto (0, I

1. Note the differences between the two codes3=4print (b)3=4(in Python, variables are simply labeled)2.str = r"c:\\w\e\we\weee""\ \"print (" str")3. (Version 2.7)month =int(Raw_input ("Please enter the number of months:")) Day=int(Raw_input ("Please enter the number of days:")) Hour=int(Raw_input ("Please enter the number of hours:")) minute=int(Raw_input ("Please enter the number of minutes:")) Second=int(Raw_input ("Please enter the number of seco

1. Use of flowchart.In the early stages of writing a program, you can try to write a flowchart, understand the logical sequence, realize the function, judge the condition, etc.2. Built-in functionsBIF = = Built-in-function, querying the built-in functions in Python, you can use code:Dir (__builtins__)3. For a function that is not clear, you can learn about functions by using Help (function).4. The game source code in the classroom:Print(".............

The GUI class library (Easygui) for Python's third-party simple graphical interface is downloaded and installedDownload : Easygui official website http://easygui.sourceforge.net Download Easygui compression pack Install : Copy the extracted easygui.py to Python under the Lib\site-packages folder under the installation directory Test : Bring up Python's idle, enter>>>import Easygui>>>easygui.msgbox ("This is test!")If a dialog box appears, i

tables, translation tables are converted through the Maketrans method. Deletechars--a list of characters to filter in the string.Translate is a one by one mapping of characters. Each character will be replaced with the corresponding character as soon as it appears.Replace is a string substitution, and the string is replaced as a whole. The two string parameter lengths of replace can be different.Thezfill(width) method returns a string of the specified length, the original string is right-ali

Today I learned mainly about the main points of the cycle,1.use ofelif whiletrue:temp= Input ("Please enter a score:") score=int(temp)if ->= score >= -: Print ("A") Elif ->= score >= the: Print ("B") Elif the>= score >= -: Print ("C") Elif ->Score:print ("D") Else: Print ("Input Error")2. Use ofassert :When the following condition is true, the error occurs when the condition is false.3. Ternary conversion4,5if x > y = yelse: = xEquivalent to:if Else yThat is, the x if condition else yN

) \1","FISHCFISHC") -'FISHCFISHC'> - #141 is a (decimal ASCII value of 97) value of octal binary ->>> Re.search (r"(fishc) \141","FISHCFISHC") ->>> Re.search (r"(fishc) \141","FISHCFISHCA") -'FISHCA'> in>>> Re.search (r"(fishc) \060","FISHCFISHCA") ->>> Re.search (r"(fishc) \060","FishCFishC0") to'FishC0'> +>>> Re.search (r"\.","fishcfishc0.com") -'.'> the>>> Re.search (r"[.]","fishcfishc0.com") *'.'> $>>> Re.search (r"c*","fishcfishc0.com")Panax Notoginseng"'> - #* indicates repeated unlimited

identical tangent circlesImport turtleturtle.speed (turtle.circle)turtle.circle(()turtle.circle ( ) turtle.circle (40) draw a pentagram import Turtleturtle.speed ( 100) Turtle.forward ( 100 144) Turtle.forward ( 100 144) Turtle.forward ( 100 144) Turtle.forward ( 100 144) Turtle.forward ( 100 144) Draw an all-yellow pentagramImport turtleturtle.speed (turtle.fillcolor) ("yellow") Turtle.begin _fill (Turtle.forward)turtle.right(144) Turtle.forward (+) turtle.right(144 ) Turtle.forward

For statement syntax:For-Target in expression:Loop bodyExample 1:Favourite = ' IDMask ' for I in favourite: print (I, end= ")　　The above output isI D m a s KExample 2:member = [' Little Turtle ' ,' hett ' astray ',' Little Pudding '] for in member: Print (each, Len)The result is:Small Turtle 3 Hett 2 lost 2 small pudding 3 range () function This function matches the BIF built-in function w

],list_y[1]) defMove (self):#Random Move positionnew_x = Self.x+r.choice ([1,-1]) new_y= Self.y+r.choice ([1,-1]) #Check whether the zone is exceeded after the move ifnew_xlist_x[0]: self.x= list_x[0]-(new_x-list_x[0])elifNew_x>list_x[1]: self.x= list_x[1]-(new_x-list_x[1]) Else: self.x=new_x#Check if the y-axis is exceeded ifnew_ylist_y[0]: self.y= list_y[0]-(new_y-list_y[0])elifNew_y>list_y[1]: Self.y= list_y[1]-(new_y-list_y[1]) Else: Self.y=new_y#returns

Implementation code:Import Turtle #导入turtle模块Turtle.width (#笔的宽度)Turtle.color ("Blue") #笔的颜色Turtle.circle (#画圆)Turtle.penup () #抬笔 so that the path will not be drawn.Turtle.goto (120,0) #去坐标 (120,0)Turtle.pendown () #下笔Turtle.color ("Black")Turtle.circle (50)Turtle.penup ()Turtle.goto (240,0)Turtle.pendown ()Turtle.color ("Red")Turtle.circle (50)Turtle.penup ()Turtle.goto (60,-50)Turtle.pendown ()Turtle.col

= ' abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz 'Number = ' 0123456789 't = ' y 'While t = = ' Y ':Password = input ("Enter the password combination you need to check:")# Use NUM to count the number of occurrences of a character typenum = 0A = b = c = 0# The input cannot be emptywhile password = = ":Password = input ("Cannot be empty, please reenter:")# calculates the value of NUM, if the input is all characters, then num=0, so there will be If Password.isnumeric () or Password.isalpha