Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Quine in Python
The Quine is a program, which takes no input, but it produces output. It will show its own source code. Additionally, Quine has some conditions. We cannot open the source code file inside the program.
Example 1
Here a simple string formatting is working. We are defining a variable ‘a’, and inside a, we are storing ‘a=%r;print (a%%a)’ Then we are printing the value of a, and also replacing %r with the value of a. Thus the quine is working −
a='a=%r;print (a%%a)';print (a%a)
Output
a='a=%r;print (a%%a)';print (a%a)
Example 2
We defined a variable _ and assigned ‘_=%r;print _%%_’. Then, we printed _%_. Wwe are printing _ with _ as input to string formatting. Therefore, %r in _ gets the value of _.
_='_=%r;print (_%%_)';print (_%_)
Output
_='_=%r;print (_%%_)';print (_%_)
Not a Quine
The below code may look the smallest Quine in comparison with the above two example. But, it is actually not a quine because we are violating the rule of Quine. We cannot open a file in Quine.
Example
print(open(__file__).read())
1K+ Views
