Algorithms-in-Big-Data-Python-Programming-/Exercise 8 at main · Sunxiaoni/Algorithms-in-Big-Data-Python-Programming- · GitHub

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s1 = 'aab'
s2 = 'c*a*b'

def s1_in_s2(s1,s2):
    l1 = len(s1)
    l2 = len(s2)
    length = l2-l1
    for i in range(length+1):
        flag = 1
        for j in range(l1):
            if(s2[i+j] == '.'):
                continue
            if(s2[i+j] != s1[j]):
                flag = 0
        if(flag == 1):
            return True
    return False


def matching(s1,s2):
    if(len(s2) > 4 or len(s1) > 4):
        return 'Wrong input'
    pos_xing = []
    for i in range(len(s2)):
        if(s2[i] == '*'):
            pos_xing.append(i)
    s = []
    if(len(pos_xing) == 0):
        s.append(s2)
    if(len(pos_xing) == 1):
        for i in range(4):
            s.append(s2[:pos_xing[0]]+s2[pos_xing[0]-1]*i + s2[pos_xing[0]+1:])


    if(len(pos_xing) == 2):
        for i in range(4):
            for j in range(4):
                tmp = s2[:pos_xing[0]] + s2[pos_xing[0]-1]*i
                tmp += s2[pos_xing[0]+1:pos_xing[1]] + s2[pos_xing[1]-1]*j+s2[pos_xing[1]+1:]
                s.append(tmp)

#    print(s)

    for item in s:
        if(s1_in_s2(s1,item) == True):
            return 'True'

    return 'False'


while(True):

    s1 = input('please input s1:')
    if(s1 == 'exit'):
        break
    s2 = input('please input s2:')

    print(matching(s1, s2))


# =============================================================================
# S1 = "aba" , S2 = "*ab" => false
# S1 = "aa" , S2 = "a*" => true
# S1 = "ab" , S2 = ".*" => true
# S1 = "ab", S2 = "." => false
# S1 = "aab" , S2 = "c*a*b" => true S1 = "aaa" , S2 = "a*" => true
# =============================================================================