題目 畫圖，學用circle畫圓形。
程式分析 無。
from tkinter import
*canvas=canvas(width=
800,height=
600,bg=
'yellow'
)canvas.pack(expand=yes,fill=both)k=1
j=1for i in
range(26
):canvas.create_oval(
310-k,
250-k,
310+k,
250+k,width=1)
k+=j
j+=0.3mainloop(
)
程式分析 無。
if __name__ ==
'__main__'
:from tkinter import*
canvas = canvas(width=
300, height=
300, bg=
'green'
)
canvas.pack(expand=yes, fill=both)
x0 =
263 y0 =
263 y1 =
275 x1 =
275for i in
range(19
):canvas.create_line(x0,y0,x0,y1, width=
1, fill=
'red'
) x0 = x0 -
5 y0 = y0 -
5 x1 = x1 +
5 y1 = y1 +5
x0 =
263 y1 =
275 y0 =
263for i in
range(21
):canvas.create_line(x0,y0,x0,y1,fill =
'red'
) x0 +=
5 y0 +=
5 y1 +=5
mainloop(
)
程式分析 無。
if __name__ ==
'__main__'
:from tkinter import
* root = tk(
) root.title(
'canvas'
) canvas = canvas(root,width =
400,height =
400,bg =
'yellow'
) x0 =
263 y0 =
263 y1 =
275 x1 =
275for i in
range(19
):canvas.create_rectangle(x0,y0,x1,y1)
x0 -=
5 y0 -=
5 x1 +=
5 y1 +=
5
canvas.pack(
) root.mainloop(
)
程式分析 無。
if __name__ ==
'__main__'
:from tkinter import
* canvas = canvas(width =
300,height =
300,bg =
'green'
) canvas.pack(expand = yes,fill = both)
x0 =
150 y0 =
100 canvas.create_oval(x0 -
10,y0 -
10,x0 +
10,y0 +10)
canvas.create_oval(x0 -
20,y0 -
20,x0 +
20,y0 +20)
canvas.create_oval(x0 -
50,y0 -
50,x0 +
50,y0 +50)
import math
b =0.809
for i in
range(16
):a =
2* math.pi /
16* i
x = math.ceil(x0 +
48* math.cos(a)
) y = math.ceil(y0 +
48* math.sin(a)
* b)
canvas.create_line(x0,y0,x,y,fill =
'red'
) canvas.create_oval(x0 -
60,y0 -
60,x0 +
60,y0 +60)
for k in
range
(501):
for i in
range(17
):a =(2
* math.pi /16)
* i +(2
* math.pi /
180)
* k x = math.ceil(x0 +
48* math.cos(a)
) y = math.ceil(y0 +
48+ math.sin(a)
* b)
canvas.create_line(x0,y0,x,y,fill =
'red'
)for j in
range(51
):a =(2
* math.pi /16)
* i +(2
* math.pi /
180)
* k -
1 x = math.ceil(x0 +
48* math.cos(a)
) y = math.ceil(y0 +
48* math.sin(a)
* b)
canvas.create_line(x0,y0,x,y,fill =
'red'
) mainloop(
)
程式分析 無。
s=
'zhangguang101'
print
(len
(s))
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