#!/usr/bin/env python

# -*- coding: utf-8 -*-

# @Time    : 2018/6/5 17:53

# @Author  : chenjiahe

# @File    : count.py

#用isdigit函数判断是否数字

#用isalpha判断是否字母

#用isalnum判断是否数字和字母的组合

while 1:

    strings = input("Please input a strings(quit will exit): ")

    alpha, dig, space, other  = 0, 0, 0, 0

    if strings.strip() == "quit":

        exit(1)

    for i in strings:

        if i.isalpha():

            alpha += 1

        elif i.isdigit():

            dig += 1

        elif i.isspace():

            space += 1

        else:

            other += 1

    print("alpha:{0}".format(alpha))

    print("dig:{0}".format(dig))

    print("space:{0}".format(space))

    print("other:{0}".format(other))

#!/usr/bin/env python

# -*- coding: utf-8 -*-

# @Time    : 2018/6/5 18:33

# @Author  : chenjiahe

# @File    : 9*9.py

for a in range(1,10):

    for b in range(1,a+1):

        print("{0} x {1} = {2}  ".format(a,b,a*b),end='  ')

    print()

#!/usr/bin/env python

# -*- coding: utf-8 -*-

# @Time    : 2018/6/6 16:11

# @Author  : chenjiahe

# @File    : 九宫格.py

'''

九宫格

                      -------------

                      | A | B | C |

                      | D | E | F |

                      | G | H | I |

                      -------------

所有的横竖斜线加起来都等于15

'''

number = [1,2,3,4,5,6,7,8,9]

count = 1

for A in number:

    a = number.copy()

    a.remove(A)

    for B in a:

        b = a.copy()

        b.remove(B)

        for C in b:

            c = b.copy()

            c.remove(C)

            for D in c:

                d = c.copy()

                d.remove(D)

                for E in d:

                    e = d.copy()

                    e.remove(E)

                    for F in e:

                        f = e.copy()

                        f.remove(F)

                        for G in f:

                            g = f.copy()

                            g.remove(G)

                            for H in g:

                                h = g.copy()

                                h.remove(H)

                                for I in h:

                                    if((A+B+C == D+E+F == G+H+I == A+D+G == B+E+H == C+F+I ==A+E+I == C+E+G == 15)):

                                        print('''

                                        方法{9}

                                       -------------------

                                       | {0} | {1} | {2} |

                                       | {3} | {4} | {5} |

                                       | {6} | {7} | {8} |

                                       -------------------

                                        '''.format(A,B,C,D,E,F,G,H,I,count))

                                        count += 1

#ABCD乘九=DCBA,A=? B=? C=? D=? 答案: a=1,b=0,c=8,d=9 1089*9=9801

for a in range(1,10):

    for b in range(0,10):

        for c in range(0,10):

            for d in range(1,10):

                if ((a*1000 + b*100 + c*10 +d)*9 == (d*1000 +c*100 +b*10 + a)):

                    print("a = {0}".format(a))

                    print("b = {0}".format(b))

                    print("c = {0}".format(c))

                    print("d = {0}".format(d))

                    print("{0}{1}{2}{3}x9={3}{2}{1}{0}".format(a,b,c,d))

#!/usr/bin/env python

# -*- coding: utf- -*-

# @Time    : // :

# @Author  : chenjiahe

# @File    : 阶乘.py

'''

计算n个阶乘之和

! + ! + ! …… + n!

n! = n*(n-)*(n-)*(n-）……*

'''

#计算单个阶乘

def jc(n):

    result =

    if n == :

        return result

    else:

        for i in range(,n+):

            result *= i

        return result

#计算阶乘之和

n = input("计算n的阶乘之和:")

count =

for i in range(,int(n)+):

    count += jc(i)

print("{0}的阶乘之和是{1}".format(n,count))

#!/usr/bin/env python

# -*- coding: utf-8 -*-

# @Time    : 2018/6/7 14:07

# @Author  : chenjiahe

# @File    : 面试题.py

'''

用python完成转换序列的字符，有一串字符串，包含只包含四个字母，GCTA，现在需要进行以下转换:

*'G' ->'C'

*'C' ->'G'

*'T' ->'A'

*'A' ->'U'

如果序列中有不包含这四个字母的字符，就返回空。举例：

1.'ACGTGGTCTTAA' -> 'UGCACCAGAAUU'

2.'ACGTXXXCTTAA' -> ''

'''

while 1:

    string1 = input("Please input a string only with 'G' 'C' 'T' 'A': ")

    string2 = ''

    length1 = len(string1)

    for i in range(0,length1):

        if ((string1[i] == 'G')):

            string2 = string2 + 'C'

        elif ((string1[i] == 'C')):

            string2 = string2 + 'G'

        elif ((string1[i] == 'T')):

            string2 = string2 + 'A'

        elif ((string1[i] == 'A')):

            string2 = string2 + 'U'

        else:

            print(' ')

            exit(1)

    print("{0}".format(string2))