相信有很多人都在努力地自学着Python,但自学过程中总是看懂了却不会做。这就像学生时期老师讲过了,觉得听懂了,但一看题就懵了。
在自学任何一门软件或是编程语言的过程中,最重要的是结合教程去进行实践训练,毕竟“实践才是检验真理的唯一标准”。
今天给大家带来Python从初级入门到精进的练习实例共100例,每篇五道题保持篇幅不会过长,大家练习也循序渐进、松弛有度。并且还会附上题目程序的的源代码,供大家参考,大家初期可以“照猫画虎”去发现其编程的目的及规律,从而更好地理解。
Python 练习实例56
题目:画图,学用circle画圆形。
程序分析:无。
程序源代码:
#!/usr/bin/python
# -*- coding: UTF-8 -*-
if __name__ == '__main__':
from Tkinter import *
canvas = Canvas(width=800, height=600, bg='yellow')
canvas.pack(expand=YES, fill=BOTH)
k = 1
j = 1
for i in range(0,26):
canvas.create_oval(310 - k,250 - k,310 + k,250 + k, width=1)
k += j
j += 0.3
mainloop()
Python 练习实例57
题目:画图,学用line画直线。
程序分析:无。
程序源代码:
#!/usr/bin/python
# -*- coding: UTF-8 -*-
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 = 275
for 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 = 263
for i in range(21):
canvas.create_line(x0,y0,x0,y1,fill = 'red')
x0 += 5
y0 += 5
y1 += 5
mainloop()
Python 练习实例58
题目:画图,学用rectangle画方形。
程序分析:参数说明:(left ,top )为矩形的左上坐标,(right,bottom)为矩形的右下坐标,两者可确定一个矩形的大小
程序源代码:
#!/usr/bin/python
# -*- coding: UTF-8 -*-
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 = 275
for i in range(19):
canvas.create_rectangle(x0,y0,x1,y1)
x0 -= 5
y0 -= 5
x1 += 5
y1 += 5
canvas.pack()
root.mainloop()
Python 练习实例59
题目:画图,综合例子。
程序分析:利用for循环控制100-999个数,每个数分解出个位,十位,百位。。
程序源代码:
#!/usr/bin/python
# -*- coding: UTF-8 -*-
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()
Python 练习实例60
题目:计算字符串长度。
程序分析:无。
程序源代码:
#!/usr/bin/python
# -*- coding: UTF-8 -*-
sStr1 = 'strlen'
print len(sStr1)
祝大家Python学习顺利!没有 B U G~
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