四个python小练习:
1、打印出1-100之间的所有偶数
<pre class="brush:python;gutter:true;">def even_print(): for i in range(1,101): if i % 2 == 0: print (i) even_print() #列表解析式的方式: k = [n for n in range(1,101) if n%2 == 0] print (k)
2、设计一个函数,在桌面上创建10个文件,并以数字命名
def text_creation(): path = 'C:/Users/Administrator/Desktop' for name in range (1,11): with open(path + str(name) + '.txt','w') as text: text.write(str(name)) text.close() print ('done')text_creation()
3、复利计算函数
def invest(amount,rate,time): print('principal amount:{}'.format(amount)) for t in range(1,time + 1): amount = amount * (1 + rate) print ('year {}: ${}'.format(t,amount)) invest(100,.05,8) invest(2000,.025,5)
4、随机验证码
import random checkcode = '' for i in range(4): current = random.randrange(0,4) if current != i: temp = chr(random.randint(65,90)) else: temp = random.randint(0,9) checkcode += str(temp) print (checkcode)
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