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Python Practice every day ：

• Title Description
• Their thinking
• The source code to share
• Learning summary
• • ** To summarize the three quotation mark method ：**
• The articles ---- Good article recommends

Title Description

Title Description
This question is to fill in the blanks , Just calculate the result , Use the output statement in the code to output the filled results .

+-------------------------------------------------+
| |
| H###### #### |
| # # # |
| # # # |
| # #### # # |
| # # # # # |
| ######@### # # |
| # #### # # |
| # # # # # |
| ####@#######@### # # |
| # # # # # |
| T ##### # # # ## |
| # # ### ### ## |
| ################ # # #### |
| # # # # |
| ############## #######@########## |
| # ### |
| ########################### |
+-------------------------------------------------+

Xiao Ming found an old computer in Grandpa's private collection . There's no graphical interface , Can only be programmed with the console . After Xiao Ming's groping , Magically designed the greedy Snake game on the console .
Above , It's a screenshot of the game .
among ,H It means snake head ,TT Indicates snake tail .# Represents the body of a snake ,@ Indicates where the body crosses and overlaps . Can you tell the length of the greedy snake now ？
Actually , Just count # The number of 1, Count out @ The number of counts counts count 2, Plus the head and tail , Plus the head and tail 1$ And we're done .
Count by hand ？ Too tired eyes , Smart, why don't you let the computer help ？
The requirement of this question is ： Please output the length of the greedy snake in the above figure ？

 Operation limit
Maximum operation time ：1s
Maximum running memory : 128M

Their thinking

• count Function directly calculates the number of times a symbol appears
• The three quotation marks method represents the maze in the form of string

The source code to share

# Time : 2022/2/11 13:06
# File : snake .py
# Author : yes Dream ah ！
# WeChat VX : Xu18300396393
# Ten thousand times sad , There will still be Dream, I've been waiting for you in the warmest place ！
import os
import sys
# Please enter your code here 
a = ''' +-------------------------------------------------+ | | | H###### #### | | # # # | | # # # | | # #### # # | | # # # # # | | ######@### # # | | # #### # # | | # # # # # | | ####@#######@### # # | | # # # # # | | T ##### # # # ## | | # # ### ### ## | | ################ # # #### | | # # # # | | ############## #######@########## | | # ### | | ########################### | +-------------------------------------------------+'''
print(a.count('#')+2+2*a.count('@'))

Learning summary

To summarize the three quotation mark method ：

actually 3 Two single quotes and 3 Double quotes are not often used , But it is useful in some special format strings . Usually, when we define a string in single quotation marks or double quotation marks, we can only write the strings together in one line , If you have to write multiple lines , You have to add a... After each line \ Represents a hyphen , such as ：

str1 = "List of name:\
Hua Li\
Chao Deng"
print(str1)

But we can't get the answer we want , In fact, its output is ：

List of name: Hua Li Chao Deng

So how do we get the desired output format of one name per line ？ This is it. 3 The use of quotation marks ：

str1 = '''List of name: Hua Li Chao Deng'''
print(str1)

Get the answer ：

List of name:
Hua Li
Chao Deng

Although we can also add... To the string \n Realization ：

str1 = "List of name:\nHua Li\nChao Deng"
print(str1)
#List of name:
#Hua Li
#Chao Deng

But it looks a lot messy when typing, doesn't it ？ So try to use it in this case 3 Quotation marks , as for 3 Single quotation marks or double quotation marks are the same , Just note that if the string contains single quotation marks, you need to use double quotation marks to define it .

And use 3 Another great use of quotation marks is ： add comments of explanations ！

Today is my day Python The first of the training camp 18 God , I hope to see the best of you every day

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