2-2
(a) 计算 1 + 2 * 4
(b) 无输出
(c) 一样。无输出语句。
(d) 单独执行无输出，在交互解释器里执行输出结果。
(e)print 1 + 2 * 4
2-4
(a)
str = raw_input('input a str:')
print str
(b)
str = raw_input('input a int:')
print int(str)
2-5
(a)
i = 0
while i <= 10:
print i,
i += 1
(b)
for eachNum in range(11):
print eachNum,
2-6
num = raw_input('input a num: ')
if num > 0:
print '正数',
elif num < 0:
print '负数',
else:
print '0',
2-7
myStr = raw_input('input a str: ')
i = 0
while i < len(myStr):
print myStr[i],
i += 1
myStr = raw_input('input a str: ')
for c in myStr:
print c,
2-8
aList = list()
for i in range(5):
num = raw_input('input a num : ')
aList.append(int(num))
i = 0
myNum = 0
while i < len(aList):
myNum += aList[i]
i += 1
print 'myNum is : %d' % (myNum)
2-9
aTuple = [ 1, 2, 3, 5, 6]
myNum = 0
for i in aTuple:
myNum += i
print 'average value is : %f ' % (float(myNum) / len(aTuple))
2-10
b = bool(False)
while b is False:
num = int(raw_input('input a num among 1 to 100 : '))
if num >= 1 and num <= 100:
print 'succeed!'
break
else:
print 'input error!'
2-11
def display_menu():
"""展示菜单"""
print '1. 取五个数的和'
print '2. 取五个数的平均值'
print 'x. 退出'
sel = str(raw_input('输入您的选项：'))
return sel
def tuple_sum(aTuple):
"""求和"""
num = 0
for i in aTuple:
num += i
return num
aTuple = (1, 2, 3, 4, 6)
while True :
sel = display_menu()
if sel == str('1'):
print 'num is : %d ' % tuple_sum(aTuple)
elif sel == str('2'):
print 'average is : %f ' % (float(tuple_sum(aTuple))/len(aTuple))
elif sel == str('x'):
break
else:
continue
2-15
(a)
num1 = int(raw_input('input num1:'))
num2 = int(raw_input('input num2:'))
num3 = int(raw_input('input num3:'))
if num1 > num2:
tmp = num2
num2 = num1
num1 = tmp
if num2 > num3:
tmp = num3
num3 = num2
num2 = tmp
if num1 > num2:
tmp = num2
num2 = num1
num1 = tmp
print 'min to max is %d, %d, %d' % (num1, num2, num3)
(b)
num1 = int(raw_input('input num1:'))
num2 = int(raw_input('input num2:'))
num3 = int(raw_input('input num3:'))
if num1 < num2:
tmp = num2
num2 = num1
num1 = tmp
if num2 < num3:
tmp = num3
num3 = num2
num2 = tmp
if num1 < num2:
tmp = num2
num2 = num1
num1 = tmp
print 'min to max is %d, %d, %d' % (num1, num2, num3)
2-16
fobj = open('hello.txt', 'r')
for eachLine in fobj:
print eachLine,
fobj.close()
Informações:
- Autor：Alex Yucra
- Link：https://alexyucra.github.io/blog/2012/04/05/learn-python-practise/
- Declaração de direitos autorais: atribuição gratuita de reimpressão-não-comercial-não-derivada-manter（Licença Creative Commons 3.0）