再這個題中，我試圖用xrange代替range來解決問題，但是結果輸出了『xrange（2， 26， 4）』這樣奇怪的答案。然後才理解了書上的「xrange不產生列表」這句話的含義。
」』python
ifname== 「main「:
numbers = raw_input(「please input from, to, incremen」)
lst = numbers.strip().split()
f, t, i = (int(num) for num in lst)
print range(f, t, i)
」』此處應該給while…else…乙個掌聲。
#!/usr/bin/env python
# coding: utf-8
defisprime
(a):
b = a/2
while b > 1:
if a % b == 0:
return
false
b -= 1
else:
return
true
if __name__ == "__main__":
num = int(raw_input("please input a number: ").strip())
if (isprime(num)):
print
"the number is a prime."
else:
print
"the number is not a prime."
#!/usr/bin/env python
# coding: utf-8
defshowfactor
(a):
count = a/2 + 1
lst = [i for i in xrange(1, count) if a % i == 0]
return lst
if __name__ == "__main__":
num = int(raw_input("input a number: "))
lst = showfactor(num)
print lst
#!/usr/bin/env python
# coding: utf-8
defshowfactors
(a, lst = ):
print
"the lst is : ", lst
count = a / 2
for i in range(2, count+1):
if a % i == 0:
a = a/i
return showfactors(a, lst)
else:
return lst
if __name__ == "__main__":
num = int(raw_input("please input a num: ").strip())
lst = showfactors(num)
print lst
#!/usr/bin/env python
# coding: utf-8
defshowfactor
(a):
count = a/2 + 1
lst = [i for i in xrange(1, count) if a % i == 0]
return lst
defisperfect
(num):
lst = showfactor(num)
if sum(lst) == num:
return
1else:
return
0if __name__ == "__main__":
num = int(raw_input("input a number: "))
if(isperfect(num)):
print
"it's a perfect num"
else:
print
"not a perfect"
#!/usr/bin/env python
# coding: utf-8
deffactorial
(n):
factor = 1
for i in xrange(1, n+1):
factor *= i
return factor
if __name__ == "__main__":
num = int(raw_input("input a number: "))
print
"n! is: ", factorial(num)
#!/usr/bin/env python
# coding: utf-8
deffibonacci
(n):
if n == 1:
#之所以返回兩個數是避免重複計算n-2的大小
return (0, 1)
fibn2, fibn1 = fibonacci(n-1)
return fibn1, fibn2+fibn1
deffib
(n):
#fib2得到的是n-1的fibonacci數，所以無用
fib2, fib1 = fibonacci(n)
return fib1
if __name__ == "__main__":
num = int(raw_input("input a number: "))
print fib(num)
#/usr/bin/env python
# coding: utf-8
defcountword
(sentence):
ivowel = 0
iconsonant = 0
strvower = 'aeiou'
for i in sentence:
if i.isalpha():
if i.lower() in strvower:
ivowel += 1
else:
iconsonant += 1
iword = len(sentence.split())
return (ivowel, iconsonant, iword)
if __name__ == "__main__":
sentence = raw_input("input a sentence: ")
inum = countword(sentence)
print
"the number of vowerl, consonant, word is: %s, %s, %s" %inum
#!/usr/bin/env python
# coding: utf-8
deflistprint
():print
"_" * 20
istart = int(raw_input("enter begin value: "))
iend = int(raw_input("enter end value: "))
bisstr = false
if32
< istart < 128
or34
< iend < 129
or (istart<33
and iend>128):
bisstr = true
print
"dec\t\tbin\t\toct\t\thex\t\tascii"
else:
bisstr = false
print
"dec\t\tbin\t\toct\t\thex"
print
"_" * 30
for i in xrange(istart, iend):
if32128:
print
"%s\t\t%s\t%s\t\t%s\t\t%s" %(i, bin(i), oct(i), hex(i), chr(i))
else:
print
"%s\t\t%s\t%s\t\t%s" %(i, bin(i), oct(i), hex(i))
if __name__ == "__main__":
listprint()
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