Implement python code of crawling problem related data

+jaksimsamil
+./vscode
+*.csv

+# Jaksimsamil Crawler Documentation
+  
+## Overview
+- https://acmicpc.net와 https://solved.ac에서 사용자와 문제정보를 크롤링합니다.  
+- Python 3.8.3, Pip 20.2.1 환경에서 개발되었습니다.  
+  
+## Usuage  
+  
+- Install  
+```bash  
+pip install -r requirements.txt  
+```  
+  
+- Run  
+```bash  
+python main.py  
+```

+import requests
+from bs4 import BeautifulSoup
+import pandas as pd
+from dotenv import load_dotenv
+import sys
+import pymongo
+import os
+from datetime import datetime
+import json
+import numpy as np
+
+SAVE_EVERY=10
+SAVE_PATH='problems.csv'
+def setup():
+    try:
+        load_dotenv(dotenv_path='../jaksimsamil-server/.env')
+        client=pymongo.MongoClient('/'.join(os.getenv('MONGO_URL').split('/')[:-1]))
+        print('MongoDB Connected')
+        return client
+    except FileNotFoundError:
+        print('.env is not found',file=sys.stderr)
+        exit(1)
+
+def save(df,path='problems.csv'):
+    print('Saving to {}...'.format(path),end='')
+    df.to_csv(path)
+    print('Done.')
+
+def get_khu_problem_list():
+    pageNum=1
+    idx=0
+    problems=pd.DataFrame(columns=['problemNum','problemTitle','solvedacLevel','submitNum','correctNum','category','count'])
+    while True:
+        res=requests.get('https://www.acmicpc.net/school/ranklist/211/{}'.format(pageNum))
+        status_code=res.status_code
+        if status_code==404:
+            break
+        soup=BeautifulSoup(res.text,'html.parser')
+        userlinks=soup.select('#ranklist > tbody > tr > td:nth-child(2) > a')
+        for userlink in userlinks:
+            href=userlink['href']
+            res=requests.get('https://acmicpc.net'+href)
+            print('Collecting user data...:',href.split('/')[-1])
+            user_soup=BeautifulSoup(res.text,'html.parser')
+            problemNums=user_soup.select('body > div.wrapper > div.container.content > div.row > div:nth-child(2) > div:nth-child(3) > div.col-md-9 > div:nth-child(1) > div.panel-body > span.problem_number')
+            for problemNum in problemNums:
+                if not problemNum.text in problems['problemNum'].tolist():
+                    problems=problems.append({'problemNum':problemNum.text,'count':1},ignore_index=True)
+                else:
+                    problems.loc[problems.problemNum==problemNum.text,'count']=problems.loc[problems.problemNum==problemNum.text,'count']+1
+            if idx%SAVE_EVERY==0:
+                save(problems,SAVE_PATH)
+            idx+=1
+        pageNum+=1
+    save(problems,SAVE_PATH)
+    return problems
+
+def get_problem_info(problems):
+    for idx,problemNum in enumerate(problems['problemNum'].values):
+        res=requests.get('https://acmicpc.net/problem/{}'.format(problemNum))
+        print('Collecting problem data...:',problemNum)
+        soup=BeautifulSoup(res.text,'html.parser')
+        problemTitle=soup.select('#problem_title')[0].text
+        soup=soup.select('#problem-info > tbody > tr > td')
+        submitNum=soup[2].text
+        correctNum=soup[4].text
+        problems.loc[problems.problemNum==problemNum,'problemTitle']=problemTitle
+        problems.loc[problems.problemNum==problemNum,'submitNum']=submitNum
+        problems.loc[problems.problemNum==problemNum,'correctNum']=correctNum
+        if idx%SAVE_EVERY==0:
+            save(problems,SAVE_PATH)
+    save(problems,SAVE_PATH)
+    return problems
+
+def get_solvedac_level(problems):
+    for idx,problemNum in enumerate(problems['problemNum'].values):
+        res=requests.get('https://api.solved.ac/v2/search/problems.json?query={}&page=1&sort=id&sort_direction=ascending'.format(problemNum))
+        print('Collecting solved.ac level data...:',problemNum)
+        result=json.loads(res.text)
+        for problem in result['result']['problems']:
+            if problem['id']==problemNum:
+                problems.loc[problems.problemNum==problemNum,'solvedacLevel']=problem['level']
+                break
+        if idx%SAVE_EVERY==0:
+            save(problems,SAVE_PATH)
+    save(problems,SAVE_PATH)
+    return problems
+
+def get_category(problems):
+    problems.sort_values(['problemNum'],inplace=True,ignore_index=True)
+    problems['category']=problems['category'].fillna(json.dumps([]))
+    pageNum=1
+    res=requests.get('https://api.solved.ac/v2/tags/stats.json?page={}'.format(pageNum))
+    tagsResult=json.loads(res.text)
+    totalPages=tagsResult['result']['total_page']
+    tags=[]
+    tags.extend(tagsResult['result']['tags'])
+    for pageNum in range(2,totalPages+1):
+        res=requests.get('https://api.solved.ac/v2/tags/stats.json?page={}'.format(pageNum))
+        tagsResult=json.loads(res.text)
+        tags.extend(tagsResult['result']['tags'])
+    print('total tags:',len(tags))
+    for tag in tags:
+        problemList=[]
+        pageNum=1
+        res=requests.get('https://api.solved.ac/v2/search/problems.json?query=solvable:true+tag:{}&page={}&sort=id&sort_direction=ascending'.format(tag['tag_name'],pageNum))
+        problemResult=json.loads(res.text)
+        totalPages=problemResult['result']['total_page']
+        problemList.extend(problemResult['result']['problems'])
+        for pageNum in range(2,totalPages+1):
+            res=requests.get('https://api.solved.ac/v2/search/problems.json?query=solvable:true+tag:{}&page={}&sort=id&sort_direction=ascending'.format(tag['tag_name'],pageNum))
+            problemResult=json.loads(res.text)
+            problemList.extend(problemResult['result']['problems'])
+        idx=0
+        problemListLen=len(problemList)
+        for problemNum in problems['problemNum'].values:
+            if idx<problemListLen and problemList[idx]['id']==problemNum:
+                category=json.loads(problems.loc[problems.problemNum==problemNum,'category'].values[0])
+                category.append(tag['full_name_ko'])
+                problems.loc[problems.problemNum==problemNum,'category']=json.dumps(category,ensure_ascii=False)
+                idx+=1
+                print('Problem {} in category {}'.format(problemNum,tag['full_name_ko']))
+        save(problems,SAVE_PATH)
+    return problems            
+
+
+def update_database(problems,client):
+    database=client['jaksimsamil']
+    collection=database['problem']
+    dictedProblems=problems.to_dict('records')
+    print('len of records:',len(dictedProblems))
+    for dictedProblem in dictedProblems:
+        dictedProblem['category']=json.loads(dictedProblem['category'])
+        collection.update_one({'problemNum':dictedProblem['problemNum']},{'$set':dictedProblem},upsert=True)
+
+
+if __name__=="__main__":
+    startTime=datetime.now()
+    client=setup()
+    problems=get_khu_problem_list()
+    problems=get_problem_info(problems)
+    problems=pd.read_csv('problems.csv',index_col=0)
+    problems=get_solvedac_level(problems)
+    problems=get_category(problems)
+    update_database(problems,client)
+    print('Time elapsed :',(datetime.now()-startTime)/60,'mins')
+    

+beautifulsoup4==4.9.1
+bs4==0.0.1
+certifi==2020.6.20
+chardet==3.0.4
+idna==2.10
+numpy==1.19.1
+pandas==1.1.0
+pymongo==3.11.0
+python-dateutil==2.8.1
+python-dotenv==0.14.0
+pytz==2020.1
+requests==2.24.0
+six==1.15.0
+soupsieve==2.0.1
+urllib3==1.25.10