本篇文章是一篇关于输出元素的帖子
《Python for Beginners》为LearnStreet上的Python入门课程。本节要主学习内容为Lists and Tuples。
Lesson 6 Lists and Tuples
1. Length of List
盘算List变量的度长。
1 def run(var): 2 #return your code here 3 return len(var) 4 5 #This is just for you to see what happens when the function is called 6 print run([1,2,3,4,5])
输出结果:
5
2. Removing Elements of a List
移除表列中的某个元素。
days = ["funday","sunday","monday","tuesday","wednesday","thursday","friday"]
days.pop(0)
注意:pop(0)应用的是圆括号。
3. Appending Lists
在表列尾末加添元素。
days.append("saturday")
其中,days为List型类变量。
4. Concatenating Lists
连接两个表列。
1 def run(first, second): 2 #your code here 3 return first + second 4 5 #This is just for you to see what happens when the function is called 6 print run([1,2,3],[4,5,6])
输出结果:
[1, 2, 3, 4, 5, 6]
5. Tuples
建创tuple变量应用圆括号而不是方括号,tuple型类的变量值是不可变的。
例如:tup = (10, 20, 30)
每日一道理
美丽是平凡的,平凡得让你感觉不到她的存在;美丽是平淡的,平淡得只剩下温馨的回忆;美丽又是平静的,平静得只有你费尽心思才能激起她的涟漪。
美丽是平凡的,平凡得让你感觉不到她的存在;美丽是平淡的,平淡得只剩下温馨的回忆;美丽又是平静的,平静得只有你费尽心思才能激起她的涟漪。
1 def run(): 2 #your code here 3 name = ("Guinevere", 9102) 4 return name 5 6 #This is just for you to see what happens when the function is called 7 print run()
输出结果:
('Guinevere', 9102)
6. 温习训练
1 # assume lst is a list and tup is a tuple 2 def run(lst, tup): 3 #your code here 4 if lst[1] == tup[1]: 5 return tuple(lst) == tup 6 else: 7 return "not equal" 8 9 #This is just for you to see what happens when the function is called 10 print run([1,2,3],(1,2,3))
输出结果:
True
注意:型类转换tuple(lst)
总结:
tuple和list是两种不同的数据型类,他们远永不会等相。但是他们外部的元素都是string型类,可以行进比拟。
文章结束给大家分享下程序员的一些笑话语录: 真正的程序员喜欢兼卖爆米花,他们利用CPU散发出的热量做爆米花,可以根据米花爆裂的速度听出正在运行什么程序。
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