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] ...
Numpy Interview Questions 1. How will you reverse the numpy array using one line of code? This can be done as shown in the following: reversed_array = arr[::-1] where arr = original given array, reverse_array is the resultant after reversing all elements in the input. 2. How will ...
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....
Do Timed Tests and Practice Whiteboard Coding On-site interviews at FAANG+ companies can sometimes test your ability to code on a whiteboard. The idea behind this is that it makes it possible for recruiters to gauge your thought process and problem-solving approach and consequently make a hiring...
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...
Download the sample code:Click here to get the code you’ll useto work through the Python practice problems in this tutorial. Feel free to reach out in the comments section with any questions you have or suggestions for other Python practice problems you’d like to see! Also check out our...
Online Coding Practice with online compiler on Python, Java, PHP, Javascript, SQL, Html, Go and many more. | CodePractice
Python Challenge home page, The most entertaining way to explore Python. Every puzzle can be solved by a bit of (python) programming.
And use MAX_IN_ROW everywhere else in the code you need to check this value. Input validation This may be an advanced topic you have not covered yet, but as a rule of thumb all programs must guard against bad or invalid user input. Some questions, especially on time constrained exams te...