練習一:打出1-100之間的所有偶數
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)
練習二:設計一個函數,在桌面上創建10個文件,並以數字命名
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()
練習三:復利計算函數
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)
練習四:隨機驗證碼:
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)
執行結果:
C:\Users\Administrator\AppData\Local\Programs\Python\Python35\python.exe D:/python3/shenqiankaobei.py 22U3