Data Type

參見 Python初學 資料形態 串列 串列操作 字典 排序

• int

          score = int(input("請輸入成績"))
          if score >= 60:
              print("成績及格!")
          else:
              print("成績不及格!")
        

• float

          x = 3.14
          print(x)
          print(type(x))
        

• bool

          a = True
          print(a)
          print(type(a))
          b = False
          print(b)
        

• str

          song = "Hello, Goodbye"
          print(song)
          print(type(song))
          str_len = len(song)
        

          # 字串連接
          str1 = "Lucy in the sky"
          str2 = " with diamonds"
          str = str1 + str2
          print(str)        
        

          # 字串 slicing
          str1 = "Python"
          str2 = str[1:4]   # yth (1~3)
          str3 = str[4]     # o
          print(str)        
        

• list

my_list.append(object)

my_list.insert(position, object)

my_list.extend(list_2)

my_list.remove(object)

my_list.pop()         # 移除這個 list 的最後一個元素

my_list.sort()         # 排序 list

my_list.sort(reverse=True)         # 遞減排序 list

sorted_list = sorted(my_list)         # 取得排序過的資料

max_item = max(my_list)         # 最大值

min_item = min(my_list)         # 最小值

total = sum(my_list)         # 總和

element in my_list         # 一個元素是否存在於 list 中

list_str = 'seperateStr(要用來隔開的符號)'.join(my_list)         # 把 list 轉換為字串

          dangerous = ['Jam', 'In the Closet', 'Remember the Time',"Heal the World","Black or White","Who Is It","Give In to Me", "Dangerous"]
          dangerous_str = ', '.join(dangerous)
          print(dangerous_str)
          new_dangerous_list = dangerous_str.split(", ")
          print(new_dangerous_list)
        

new_list = str.split()         # 把字串用空白隔開的值切成 list

new_list = str.split(my_list)         # 把字串用逗號隔開的值切成 list

          theBeatles = ['John Lennon', 'Paul McCartney', 'Ringo Starr', 'George Harrison']
          for i in theBeatles:
              print(i)
          
          print(theBeatles[0])    # 第一個
          print(theBeatles[-1])   # 最後一個
        

lst = [int(num) for num in input().split()         # 把 list 中的數字都存成整數的形態

• dictionary

dict_1 = {}

dict_2 = dict()

movie_1 = {'name': 'Saving Private Ryan',
           'year': 1998,
           'director': 'Steven Spielberg'}
movie_2 = dict(name='The Breakfast Club',
               year=1985, 
               director='John Hughes')
movie_3 = {'name': 'Catch Me If You Can',
           'year': 2002,
           'director': 'Steven Spielberg'}
           
print(movie_1['name'])         # 執行後會得到 Saving Private Ryan
print(movie_1.get("cast"))         # 如果key不存在的話，程式會回傳None，不會出現錯誤訊息
print(movie_1.get("cast", "not found"))         # 可以自己設定空訊息
print(movie_2['year'])     #執行後會得到 1985
print(movie_3['director']) #執行後會得到 Steven Spielberg
        

# 產生或列印字典中的鍵值對

          for key, value in dict.items():
              print(key, value)
        

check = 'name' in() movie_1         # 檢查指定的 key 是否存在於字典中