Exercise 2: Basic Graphics Drawing in Python (Week 2)

turtle square drawing

 

describe

Using the turtle library, draw a square.

NOTE: This is not an auto-graded question, it is for practice only, and is not graded.

 

output example

The square effect is as follows:

 

Code: Mr. Songtian on Mooc, the speech is very clear and clear, let's write it directly, square, loop four times, first draw a 100-pixel straight line, and turn the pen 90 degrees each time. Just a square.

# print square
import turtle
turtle.setup(650,350)
turtle.pecolor("purple")
for i in range(4):
    turtle.fd(100)
    turtle.left(90)

turtle hexagon drawing

 

describe

Using the turtle library, draw a hexagon.

NOTE: This is not an auto-graded question, it is for practice only, and is not graded.

 

output example

The hexagon effect is as follows:

 

Code: Loop six times, first draw 100 pixels each time, and then turn left 60 degrees, because of the hexagon, each inner angle is 120, and the outer angle is 180-120=60. The rotation is the current angle of this point.

#print hexagram
import turtle as t
t.setup(600,600)
for i in range(6):
     t.fd(100)
     t.left(60)

turtle overlapping edge drawing

 

describe

Using the turtle library, draw a stacked polygon, where the inner angle of the stacked polygon is 80 degrees.

NOTE: This is not an auto-graded question, it is for practice only, and is not graded.

 

output example

The overlapping edge effect is as follows:

 

Code:

#Draw the overlapping edge effect
import turtle as t
t.setup(600,600)
for i in range(7):
    t.fd(100)
    t.left(80)

turtle draws with tangent circle

 

describe

Using the turtle library, draw a tangent circle.

NOTE: This is not an auto-graded question, it is for practice only, and is not graded.

 

output example

The effect of the same tangent circle is as follows:

 

Code: increment the radius of the rotation by 30 pixels each time

#draw the same cut garden
import turtle as t
t.setup(600,600)
for i in range(4):
 t.circle(50+i*30)

length conversion I

describe

Please write a program to complete the length conversion between meters and inches. The basic requirements are as follows:

Enter inches, convert to meters;

Enter meters to convert to inches.

Inches are marked with in and placed at the end of the value; meters are marked with m and placed at the end of the value.

1 meter = 39.37 inches

Please use input() for input parameters, do not add prompt string information.

 

input format

 

Example 1: 10m

Example 2: 20in

 

 

output format

The same as the input format, the output result retains 3 decimal places.

 

Example of input and output

 

	enter	output
Example 1	10m 20in	393.700in 0.508m

代码：输入的时候判读最后一个字母是m的话就就是米转换英尺，按照题目给的计算公式计算，其余情况都按照英尺转换米计算。

#长度转换 I
a=input()
if(a[-1])=='m':
    ans=eval(a[0:-1])*39.37
    print("{:.3f}in".format(ans))
else:
    ans=float(eval(a[0:-2]))/39.37
    print("{:.3f}m".format(ans))