資料預操作

1.字元串操作：

• 解析身份證号：生日、性别、出生地等。
• 凱撒密碼編碼與解碼
• 網址觀察與批量生成

2.英文詞頻統計預處理

• 下載下傳一首英文的歌詞或文章或小說，儲存為utf8檔案。
• 從檔案讀出字元串。
• 将所有大寫轉換為小寫
• 将所有其他做分隔符（,.？！）替換為空格
• 分隔出一個一個的單詞
• 并統計單詞出現的次數。

上面這些是老師的。

 1

• ID = input('請輸入十八位身份證号碼: ')
  if len(ID) == 18:
      print("你的身份證号碼是 " + ID)
  else:
      print("錯誤的身份證号碼")
  
  ID_add = ID[0:6]
  ID_birth = ID[6:14]
  ID_sex = ID[14:17]
  ID_check = ID[17]
  year = ID_birth[0:4]
  moon = ID_birth[4:6]
  day = ID_birth[6:8]
  print("生日: " + year + '年' + moon + '月' + day + '日')
  
  if int(ID_sex) % 2 == 0:
      print('性别：女')
  else:
      print('性别：男')
  
  W = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]
  ID_num = [18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2]
  ID_CHECK = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2']
  ID_aXw = 0
  for i in range(len(W)):
      ID_aXw = ID_aXw + int(ID[i]) * W[i]
  ID_Check = ID_aXw % 11
  if ID_check == ID_CHECK[ID_Check]:
      print('正确的身份證号碼')
  else:
      print('錯誤的身份證号碼')      

• import os
  def encryption():
      str_raw = input("請輸入明文：")
      k = int(input("請輸入位移值："))
      str_change = str_raw.lower()
      str_list = list(str_change)
      str_list_encry = str_list
      i = 0
      while i < len(str_list):
          if ord(str_list[i]) < 123-k:
              str_list_encry[i] = chr(ord(str_list[i]) + k)
          else:
              str_list_encry[i] = chr(ord(str_list[i]) + k - 26)
          i = i+1
      print ("加密結果為："+"".join(str_list_encry))
  def decryption():
      str_raw = input("請輸入密文：")
      k = int(input("請輸入位移值："))
      str_change = str_raw.lower()
      str_list = list(str_change)
      str_list_decry = str_list
      i = 0
      while i < len(str_list):
          if ord(str_list[i]) >= 97+k:
              str_list_decry[i] = chr(ord(str_list[i]) - k)
          else:
              str_list_decry[i] = chr(ord(str_list[i]) + 26 - k)
          i = i+1
      print ("解密結果為："+"".join(str_list_decry))
  while True:
          encryption()
          decryption()
          choice = input("continue? Y/N")
          if choice == "Y":
              continue;
          else:
              exit(0)
  
        

  

• bilibili熱門視訊連結   

  import requests
  from bs4 import BeautifulSoup
  import os
  
  url = 'https://www.bilibili.com/ranking/all/4/1/7/?spm_id_from=333.334.b_72616e6b696e675f67616d65.15'
  
  parser = 'html.parser'
  cur_path = os.getcwd() + '/'
  
  header = {
      'User-Agent':'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.104 Safari/537.36',  
      "Accept-Language":"zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3",
      "Accept-Encoding":"gzip, deflate",
      "Referer":"http://bilibili.com/",
      "Cookie":"safedog-flow-item=; bdshare_firstime=1504530621757",
      "Connection":"keep-alive",
      "Upgrade-Insecure-Requests":"1",
      "Cache-Control":"max-age=0"
           }
  preview_page_cnt = 2
  for cur_page in range(1, int(preview_page_cnt) + 1):
      cur_url = url + str(cur_page)
      cur_page = requests.get(cur_url, headers=header)
      soup = BeautifulSoup(cur_page.text, parser)
      for link in soup.find_all('a',target='_blank')[1::2]:
          dir_name = link.get_text().strip().replace('?', '')
          link=link['href']
          print(link+dir_name)      

  

  2.

  歌曲

  Stand up, all victims of oppression
  　　For the tyrants fear your might
  　　Don't cling so hard to your possessions
  　　For you have nothing, if you have no rights
  　　Let racist ignorance be ended
  　　For respect makes the empires fall
  　　Freedom is merely privilege extended
  　　Unless enjoyed by one and all.
  　　
  　　So come brothers and sisters
  　　For the struggle carries on
  　　The Internationale
  　　Unites the world in song
  　　So comrades come rally
  　　For this is the time and place
  　　The international ideal
  　　Unites the human race
  　　
  　　Let no one build walls to divide us
  　　Walls of hatred nor walls of stone
  　　Come greet the dawn and stand beside us
  　　We'll live together or we'll die alone
  　　In our world poisoned by exploitation
  　　Those who have taken, now they must give
  　　And end the vanity of nations
  　　We've one but one Earth on which to live
  　　
  　　So come brothers and sisters
  　　For the struggle carries on
  　　The Internationale
  　　Unites the world in song
  　　So comrades come rally
  　　For this is the time and place
  　　The international ideal
  　　Unites the human race
  　　
  　　And so begins the final drama
  　　In the streets and in the fields
  　　We stand unbowed before their armour
  　　We defy their guns and shields
  　　When we fight, provoked by their aggression
  　　Let us be inspired by life and love
  　　For though they offer us concessions
  　　Change will not come from above.
  　　
  　　So come brothers and sisters
  　　For the struggle carries on
  　　The Internationale
  　　Unites the world in song
  　　So comrades come rally
  　　For this is the time and place
  　　The international ideal
  　　Unites the human race
        

  　　代碼

  resoult={}
  str=",.?!  "
  op=0
  with open("pa.txt","r",encoding="utf8",errors="ignore") as  f:
      text=f.read()
  for i in range(4):
      text=text.replace(str[i]," ")
      print(text)
  for i in range(100):
      alist = text.split(" ")
      result=text.count(alist[i])
      print(alist[i])
      print(result)