一些Python代码

Posted 2022-12-20 candyyang

统计字符串中的字符个数。未通过

def countchar(string):
    c_dict = 
    for i in range(26):
        c_dict[chr(ord(‘a‘)+i)] = 0
    for c in string:
        if c in c_dict:
            c_dict[c] += 1
    return list(c_dict.values())
if __name__ == "__main__":
    string = input()
    string = string.lower()
    print(countchar(string))

 以下为通过代码，注意字典是无序的

def countchar(string):
    c_dict = 
    c_list = []
    for i in range(26):
        c_dict[chr(ord(‘a‘)+i)] = 0
    for c in string:
        if c in c_dict:
            c_dict[c] += 1
    c_list = c_dict.items()
    c_list= sorted(c_list, key = lambda x:x[0])
    c_list = [x[1] for x in c_list]

    return c_list
if __name__ == "__main__":
    string = input()
    string = string.lower()
    print(countchar(string))

 判断完全数

#判断一个数字是否是全数字
def is_pan(x):
    x = str(x)
    n = len(x)
    flag = True
    for i in range(1,n+1):
        if str(i) not in x:
            flag = False
            break
    return flag

def pandigital(nums):
    lst = []
    for x in nums:
        if is_pan(x):
            lst.append(x)
    return lst
 
if __name__ == "__main__":
    lst = pandigital(eval(input()))
    #调用函数根据结果输出
    for x in lst:
        print(x)
    if lst == []:
        print(‘not found‘)

统计词频

def countfeq(s):
    lst = s.split()
    w_dict = 
    for w in lst:
        if w not in w_dict:
            w_dict[w] = 1
        else:
            w_dict[w] += 1
    return w_dict
    
if __name__ == "__main__":
    s = "Not clumsy person in this world, only lazy people, only people can not hold out until the last."
    s = s.replace(‘,‘,‘‘)
    s = s.replace(‘.‘,‘‘)
    s = s.replace(‘:‘,‘‘)
    s = s.replace(‘)‘,‘‘)
    s_dict = countfeq(s.lower())
   
    word = input()
    #基于s_dict判断word的词频并输出（可能是0次）
    if word not in s_dict:
        print(0)
    else:
        print(s_dict[word])