coding

人工智能第二讲 矩阵形式的线性回归 x_11表示第一个样本的第一个值

For and Else for x in range(6): print(x) if x==2: break else: print("over") # this line will skip if last line exists Pass There cannot exist any blank within for and if else.

人工智能第一讲 定义 基于已知的函数模型预测未知的

What’s new for me Do not need to declare variables indentation replaces curly braces to divide code blocks Grammar Assigning value to multiple variables x, y, z = 1, 2, "hello" Define a global variable in local function def myfunc(): global x x = "fantastic" Change the value of a global variable inside the function x = "declan" def myfunc(): global x x = "declan and jessica" New data type for me Sample Data Type x = 1j complex x = ["apple", "banana", "cherry"] list x = ("apple", "banana", "cherry") tuple x = range(6) range x = {"name" : "Bill", "age" : 63} dict x = {"apple", "banana", "cherry"} set x = frozenset({"apple", "banana", "cherry"}) frozenset x = True bool x = b"Hello" bytes x = bytearray(5) bytearray x = memoryview(bytes(5)) memoryview Specifying the data type x = dataType(value) Verify the data type x = 'declan' type(x) Random number import random x = random.

import java.

import java.

import java.

Question My thought Nothing… The problem is pretty easy, however it troubled me for a quite long time.

First of all, let’s see what extensions I am using now.

ArrayList // the data type must be a type of class ArrayList<String> a = new ArrayList<String>(); ArrayList<Integer> b = new ArrayList<Integer>(); // the size of the ArrayList arrayList.