Question

编写一个python程序，输出所有由c,a,t,d,o,g组成（每个字母只能出现一次）的字符串

Answer 1

list0 = ['c','a','t','d','o','g']

list1 = []

for i in list0:      # 逐个选择

    for j in list0:

        if i==j:

            continue   # 消序，即跳出本次循环后续步骤，进入下一循环

        for k in list0:

            if (i==k) or (j==k):

                continue

            for m in list0:

                if (i==m) or (j==m) or (k==m):

                    continue

                for n in list0:

                    if (i==n) or (j==n) or (k==n) or (m==n):

                        continue

                    result = i+j+k+m+n

                    list1.append(result)

# 检验个数：print(len(list1))

# 打印： for i in list1:

#           print(i)

Answer 2

words=["catdog","godtac","apple","catdogg","python","hello","dogcat","cat","dog","cat_and_dog"]

for word in words:

    target=["c","a","t","d","o","g"]

    wordlist=list(word)

    for i in wordlist:

        for j in target:

            if i==j:

                target.remove(j)

                break

    if((len(target)==0) and (len(wordlist)==6)):

        print(word)
#运行结果：catdog

godtac

dogcat