实验六 付子安 202183820035

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title = ['城市', '人口(万)']
info = [ ['南京', '850'],
        ['纽约', '2300'],
        ['东京', '3800'],
        ['巴黎', '1000'] ]
with open('city1.csv', 'w', encoding='utf-8') as f:
    f.write(','.join(title) + '\n')
    for item in info:
        f.write(','.join(item) + '\n')
with open('city1.csv', 'r', encoding='utf-8') as f:
    print(f.read().rstrip('\n'))
with open('city1.csv', 'r', encoding='utf-8') as f:
    data = f.readlines()
print('data: ')
print(data)
info = [line.rstrip('\n').split(',') for line in data]
print('info: ')
print(info)

 2

 3.

def is_valid(x):
        data=x
        if len(data)!=18:
            print(False)
        else:
            if ord(data[-1])==88 or 48<=ord(data[-1])<=57 :
                print(True)
            else:
                print(False)

 with open('data3_id.txt', 'r', encoding='utf-8') as f:
     data=f.readlines()
  data=[line.strip().split(',') for line in data]
  ans=[]
  def isvalid(id):
      if len(id)!=18: return False
     else:
          for i in id:
             if '0'<=i<='9'or i=='X':continue
             return False
         return True
 for i in range(1,len(data)):
     if(isvalid(data[i][1])):
         ans.append([data[i][0],data[i][1][6:10]+'-'+data[i][1][10:12]+'-'+data[i][1][12:14]])
 ans.sort(key=lambda x:x[1])
print(f'{data[0][0]},{data[0][1]}')
 for line in ans:
     print(f'{line[0]},{line[1]}')

 4

 5

 import random
  
  n = int(input("输入随机抽点人数: "))
 with open("data5.txt", encoding="utf-8") as f:
      data = f.readlines()
  data_ = data.copy()
  lucky_people = []
  for i in range(n):
      x = random.choice(data_)
     lucky_people.append(x)
     data_.remove(x)
 with open("20220517.txt", "w+", encoding="utf-8") as f:
     f.writelines(lucky_people)
     f.seek(0)
     print(f.read())

  import random
  
  print("{0:{1}{3}{2}}".format("抽点开始", "=", 40, "^"))
  active_input = True
  ls = []
  while active_input:
      n = int(input("输入随机抽点人数: "))
      if n == 0:
          break
     else:
         with open("data5.txt", encoding="utf-8") as f:
             data = f.readlines()
         data_ = data.copy()
         lucky_people = []
         for i in range(n):
             x = random.choice(data_)
             lucky_people.append(x)
             data_.remove(x)
         with open("20220517.txt", "w+", encoding="utf-8") as f:
             f.writelines(lucky_people)
             f.seek(0)
             print(f.read())
     ls += lucky_people
 with open("20220517.txt", "w", encoding="utf-8") as f:
     f.writelines(ls)
print("{0:{1}{3}{2}}".format("抽点结束", "=", 40, "^"))

 6

 import os
 print(os.getcwd())
 py_file_list = [ file for file in os.listdir() if file.endswith('.py') ]
 for number, file in enumerate(py_file_list, 1):
     print(f'{number:-3d}. {file}')

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