Interact with Project Euler https://projecteuler.net/ via the command line.
- Fetch and view problems from Project Euler.
- Solve problems from starter template files in multiple languages.
- Submit answers directly to your Project Euler account.
- Save work locally or to an ieuler-server: https://github.com/liamcryan/ieuler-server.
Friends of Python can type this:
% pip install git+https://github.com/liamcryan/ieuler.git Collecting git+https://github.com/liamcryan/ieuler.git Cloning https://github.com/liamcryan/ieuler.git to /private/var/folders/p2/lmvnwvb554992_wcsc5rh6kw0000gn/T/pip-req-build-6hjf9n9_ ... ...
Or you can use Docker after cloning this repo:
% git clone https://github.com/liamcryan/ieuler.git Cloning into 'ieuler'... ... ... % cd ieuler % docker build --tag ieuler . % docker run --rm -it ieuler
Or pull from dockerhub:
% docker pull liamcryan/ieuler % docker run -it --rm liamcryan/ieuler
You are here to see how it feels to work on Project Euler problems from the command line.
Here is the help:
% ilr --help Usage: ilr [OPTIONS] COMMAND [ARGS]... Welcome to Interactive Project Euler Command Line Tool! Below are the commands. For more details on a specific command you can type: $ ilr [COMMAND] --help Happy trails! Options: --help Show this message and exit. Commands: config Get or set configuration options. fetch Fetch the problems from Project Euler & Interactive Project Euler. login Explicitly log in to Project Euler. logout Log out of Project Euler. ls List out the problems from Project Euler. send Send the problems to Interactive Project Euler. solve Solve a problem in your language of choice. submit Execute a file and submit its stdout to Project Euler. view View a problem and your associated code or submission information.
There are a few configurations that you might want to check out:
% ilr config
{
"credentials": {},
"language": "python",
"server": {
"host": "ieuler.net",
"port": 80
}
}
Credentials are empty but will be saved locally the first time you need to log into Project Euler. When you log into Project Euler (submitting problems requires a login via this tool), the credentials are saved in your working directory. A default language is shown - this means generated files to solve will be templated in Python. Default server information is available as well. The commands fetch and send utilize this server, however, this server must be running or started by you https://github.com/liamcryan/ieuler-server.
If you are starting fresh, or don't have the problems saved locally, you need to fetch them:
% ilr fetch
This will fetch the problems from Project Euler and the ieuler-server. If you don't have the ieuler-server running that's no problem - your problems will be saved to a file locally. If you do have it running locally, results will be saved to a database...locally. Also, you will be prompted to log into Project Euler so that you can be authenticated with ieuler-server.
Now that we are set up, let's start solving. We might want to have an idea of what the problems are. Let's not list out all of the problems from Project Euler, but feel free to type:
% ilr ls
{
"Description / Title": "Multiples of 3 and 5",
"ID": "1",
"Solved By": "941172",
"page_url": "https://projecteuler.net/archives",
"problem_url": "https://projecteuler.net/problem=1"
}{
"Description / Title": "Even Fibonacci numbers",
"ID": "2",
"Solved By": "749228",
"page_url": "https://projecteuler.net/archives",
"problem_url": "https://projecteuler.net/problem=2"
}{
"Description / Title": "Largest prime factor",
:
You can use the down or up arrow to continue scrolling through them. There are 704 right now. These problems are fetched from Project Euler and stored locally in a file called .problems.
Now that we have an idea of the problems we might want to work on, let's just pick problem 10 to solve:
% ilr solve -language=python 10
"""{
"Description / Title": "Summation of primes",
"ID": 10,
"Problem": "<div class=\"problem_content\" role=\"problem\">\n<p>The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17.</p>\n<p>Find the sum of all the primes below two million.</p>\n</div>",
"Solved By": "227482",
"page_url": "https://projecteuler.net/archives",
"problem_url": "https://projecteuler.net/problem=10"
}
"""
def answer():
""" Solve the problem here! """
return 0
if __name__ == "__main__":
""" Try out your code here """
print(answer())
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
"10.py" 20L, 557C
So we are asking to solve problem 10 using Python. What happened is a .py file is created with a basic template for coding up an answer and printing the answer to stdout. Also, the file opens in a default editor so you can edit it. Don't feel like you need to edit it here; you can always open up the file (10.py in this case) in an editor of your choice.
Once you are happy with the code you have written you will want to run it. Save the changes to the file then, for this example:
% python 10.py 0
Or you can use submit command and the --dry flag to execute the code and print the answer:
% ilr submit --dry 10 Result of executing: ['python', '10.py']: 0
It looks like the answer came out to be 0. Let's submit to Project Euler:
% ilr submit 10 A captcha is required. Would you like to continue? [y/N]: y <captcha image will be presented within terminal> Please enter the captcha: 37856 Sorry, 0 is not the answer :(
Ok, so there it is. 0 is not the answer. Now if we want to view a submitted problem, we can run:
% ilr view 10
{
"Description / Title": "Summation of primes",
"ID": "10",
"Problem": "<div class=\"problem_content\" role=\"problem\">\n<p>The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17.</p>\n<p>Find the sum of all the primes below two million.</p>\n</div>",
"Solved": false,
"Solved By": "227482",
"code": {
"python": {
"filecontent": "\"\"\"{\n \"Description / Title\": \"Summation of primes\",\n \"ID\": 10,\n \"Problem\": \"<div class=\\\"problem_content\\\" role=\\\"problem\\\">\\n<p>The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17.</p>\\n<p>Find the sum of all the primes below two million.</p>\\n</div>\",\n \"Solved By\": \"227482\",\n \"page_url\": \"https://projecteuler.net/archives\",\n \"problem_url\": \"https://projecteuler.net/problem=10\"\n}\n\n\"\"\"\n\n\ndef answer():\n \"\"\" Solve the problem here! \"\"\"\n return 0\n\n\nif __name__ == \"__main__\":\n \"\"\" Try out your code here \"\"\"\n print(answer())\n",
"filename": "10.py",
"submission": "0"
}
},
"completed_on": null,
"correct_answer": null,
"page_url": "https://projecteuler.net/archives",
"problem_url": "https://projecteuler.net/problem=10",
}
This gives us information on the problem as it pertains to us. It shows the code currently saved, if the problem is completed, and if the answer is correct, along with some data inherent to the problem.
This information is saved in a file called .problems, letting you pick up from where you last left off, and saving your code as well. You can generate your saved .py file if you need to. Try deleting the 10.py file and then run:
% ilr solve 10 --no-edit % ls 10.py
The file, 10.py, is exactly what you just deleted.
If you are finished and would like to send your progress to Interactive Project Euler, you can type:
% ilr send
Your progress is saved to the locally running ieuler-server database (if you have it running). The idea is to run ieuler-server remotely so if you want to begin again from another computer or environment, you can pick up where you left off.
Finally, it might be a good idea to logout, especially if you are using ieuler-server:
% ilr logout
The details sent to ieuler-server consist of you username and the cookies from Project Euler. Even though ieuler-server doesn't save these cookies, logging out might be a good idea because the cookies will no longer be valid on Project Euler.