python code practice(四):树、图 1、平衡二叉树 给定一个二叉树,判断它是否是高度平衡的二叉树。 本题中,一棵高度平衡二叉树定义为: 一个二叉树每个节点 的左右两个子树的高度差的绝对值不超过1。 示例1: 给定二叉树 [3,9,20,null,null,15,7] 3 / \ 9 20 / \ 15 7 返回true 。 示例2: 给定...
defmatch(self, s, pattern):#write code here#如果两者都为空,则匹配成功if(len(s) == 0andlen(pattern) ==0):returnTrue#如果模式为空,字符串不为空,则匹配不成功if(len(s) > 0andlen(pattern) ==0):returnFalseiflen(pattern) > 1andpattern[1] =='*':ifsand(pattern[0] =='.'ors[0] ...
Virtual environments are a great Python feature that allows you to create separate environments for running different Python code on the same machine. In practice, a virtual environment is just a directory tree that contains a Python installation and some other additional packages. Think of a ty...
Using a pair of parentheses to split a long line into multiple lines is a common formatting practice in Python code. However, in the context of an assert statement, the parentheses turn the assertion expression and message into a two-item tuple....
Here are 24 questions focusing on the Python del instruction within the context of lists for the PCEP-30-02 certification exam. The questions are presented in various formats, including single-select, multiple-select, gap fill, code insertion, sort, and "rearrange" questions. Each question includ...
3. Questions Question 1 Level 1 Question: Write a program which will find all such numbers which are divisible by 7 but are not a multiple of 5, between 2000 and 3200 (both included). The numbers obtained should be printed in a comma-separated sequence on a singl...
Create a subclass that inherits properties of the superclass and helps in reuse and extension of existing code. Python programming questions 21. What is the use of range () function in Python? The intent is to gain the candidate’s perception of range function and its purpose in programming...
1.Write a Python program to find the Requests module version, licence, copyright information, author, author email, document url, title and description. Click me to see the sample solution 2.Write a Python program to check the status code issued by a server in response to a client's reques...
Online Coding Practice with online compiler on Python, Java, PHP, Javascript, SQL, Html, Go and many more. | CodePractice
It is a simple, beginner-friendly, and powerful language that has built-in data structures and robust modules and libraries which helps to create rapid applications and encourage program modularity and code reuse. Also, Python is a cross-platform programming language which means that you can ...