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scholar_relatedpapers.py
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scholar_relatedpapers.py
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import random
import time
import datetime
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.chrome.options import Options
import re
from tqdm import tqdm
import pyautogui
from bs4 import BeautifulSoup
import lxml
import pandas as pd
from enum import Enum
import pyperclip
import matplotlib.pyplot as plt
from collections import Counter
import os
import nltk
from nltk.corpus import stopwords
nltk.download('punkt')
nltk.download('stopwords')
class Errors(Enum):
SUCCESS = '成功'
SERVER_ERROR = '服务器错误'
class Scholar:
def __init__(self) -> None:
self.driver = None
self.results = []
self.allresults=[]
def get_path(self,out_filepath):
if not os.path.exists(out_filepath):
os.mkdir(out_filepath)
self.results = []
self.out_filepath=out_filepath
def start_browser(self, wait_time=10):
# 创建ChromeOptions对象
options = Options()
# 启用无头模式
# options.add_argument("--headless")
# 启用无痕模式
options.add_argument("--incognito")
options.add_argument("--disable-domain-reliability")
options.add_argument("--disable-blink-features=AutomationControlled")
options.add_argument("--disable-client-side-phishing-detection")
options.add_argument("--no-first-run")
options.add_argument("--use-fake-device-for-media-stream")
options.add_argument("--autoplay-policy=user-gesture-required")
options.add_argument("--disable-features=ScriptStreaming")
options.add_argument("--disable-notifications")
options.add_argument("--disable-popup-blocking")
options.add_argument("--disable-save-password-bubble")
options.add_argument("--mute-audio")
options.add_argument("--no-sandbox")
options.add_argument("--disable-gpu")
options.add_argument("--disable-extensions")
options.add_argument("--disable-software-rasterizer")
options.add_argument("--disable-dev-shm-usage")
options.add_argument("--disable-webgl")
options.add_argument("--allow-running-insecure-content")
options.add_argument("--no-default-browser-check")
options.add_argument("--disable-full-form-autofill-ios")
options.add_argument("--disable-autofill-keyboard-accessory-view[8]")
options.add_argument("--disable-single-click-autofill")
options.add_argument("--ignore-certificate-errors")
options.add_argument("--disable-infobars")
options.add_argument("--disable-blink-features=AutomationControlled")
options.add_argument("--disable-blink-features")
# 禁用实验性QUIC协议
options.add_experimental_option("excludeSwitches", ["enable-quic"])
# 创建Chrome浏览器实例
self.driver = webdriver.Chrome(options=options)
# 等待页面加载完成
self.driver.implicitly_wait(wait_time)
def __search_onepage(self):
"""爬取当前页面文章的的信息"""
results = []
if not self.check_element_exist(check_type='ID', value='gs_res_ccl_mid'):
print('>> 当前页面不存在文章列表')
return []
gs_scl_top = self.driver.find_element(by=By.ID, value='gs_res_ccl_top').find_elements(by=By.CLASS_NAME, value='gs_r')
for item in gs_scl_top:
if '均不相符' in item.text.strip().replace('\n', ''):
return []
gs_scl = self.driver.find_element(by=By.ID, value='gs_res_ccl_mid').find_elements(by=By.CLASS_NAME, value='gs_scl')
for i, item in tqdm(enumerate(gs_scl)):
gs_fl = item.find_element(by=By.CLASS_NAME, value='gs_flb')
gs_rt = item.find_element(by=By.CLASS_NAME, value='gs_rt')
gs_a = item.find_element(by=By.CLASS_NAME, value='gs_a')
gs_rt_a = gs_rt.find_element(by=By.TAG_NAME, value='a') if self.check_element_exist(check_type='TAG_NAME', value='a', source=gs_rt.get_attribute('innerHTML')) else None
publisher_info = gs_a.text.strip().replace('\n', '')
# 论文标题
title = gs_rt.text.strip().replace('\n', '').split(']')[-1].strip()
# 论文链接
href = gs_rt_a.get_attribute('href') if gs_rt_a else ''
# 发表年份
#year = re.findall(r'\d{4}', publisher_info)
firstauthor=publisher_info.split(',')[0].strip()
lastauthor=publisher_info.split('-')[0].strip().split(',')[-1].strip()
#year = year[-1] if year else str(-1)
try:
cited=gs_fl.text.strip().replace('\n', '').split('被引用次数：')[1].split('相关文章')[0].strip()
except:
cited='0'
# print(f'[{i}] {title} => {href} => {publisher_info} => {year}')
results.append({'title': title, 'href':href,'cited':int(cited.split()[0]),'firstauthor':firstauthor,'lastauthor':lastauthor})
return results
def check_element_exist(self, value, check_type='CLASS_NAME', source=None) -> bool:
"""检查页面是否存在指定元素"""
page_source = source if source else self.driver.page_source
soup = BeautifulSoup(page_source, 'lxml')
if check_type == 'ID':
return len(soup.find_all(id=value)) != 0
elif check_type == 'CLASS_NAME':
return len(soup.find_all(class_=value)) != 0
elif check_type == 'TAG_NAME':
return len(soup.find_all(value)) != 0
elif check_type == 'FULL':
return value in page_source
else:
print(f'>> 检查条件[{check_type}]不对')
return False
def check_captcha(self) -> bool:
"""检查是否需要人机验证；一个是谷歌学术的、一个是谷歌搜索的"""
return self.check_element_exist(check_type='ID', value='gs_captcha_f') or \
self.check_element_exist(check_type='ID', value='captcha-form')
def process_error(self, error: Errors) -> bool:
"""尽可能尝试解决错误"""
success = False
if error == Errors.SERVER_ERROR:
pass
return success
def check_error(self, try_solve = True) -> Errors:
"""检查当前页面是否出错"""
error = Errors.SUCCESS
if self.check_element_exist(check_type='FULL', value='服务器错误'):
error = Errors.SERVER_ERROR
# 尝试解决错误
if try_solve and error != Errors.SUCCESS:
error = Errors.SUCCESS if self.process_error(error) else error
return error
def __scroll2bottom(self):
# 将滚动条移动到页面的底部
self.driver.switch_to.default_content()
js = "var q=document.documentElement.scrollTop=100000"
self.driver.execute_script(js)
def search(self,keywords, sort_bydate=False, as_ylo='2017', as_yhi=f'{datetime.datetime.today().year}', max_pages=100, delay=0):
keywords = keywords.replace(' ', '+')
sort_bydate = 'scisbd=1' if sort_bydate else ''
url=input('请输入网址：').strip() or 'https://scholar.google.com.hk/scholar?cites=6237094698531762861&as_sdt=2005&sciodt=0,5&hl=zh-CN'
self.driver.get(url)
self.year=int(as_ylo)
for _ in tqdm(range(1, max_pages+1), desc='搜索中'):
while self.check_captcha():
pyautogui.alert(title='状态异常', text='请手动完成人机验证后，点击“已完成”', button='已完成')
self.driver.refresh()
time.sleep(2)
if self.check_error() != Errors.SUCCESS:
if pyautogui.confirm(text='请检查页面出现了什么问题;\n解决后，点击“确定”将会重试;\n否则，点击“取消”提前结束脚本;', title='状态异常', buttons=['确定', '取消']) == '取消':
print('>> 提前结束')
break
time.sleep(2)
onepage = self.__search_onepage()
if not onepage:
print('>> 当前页为空, 退出')
self.driver.refresh()
time.sleep(2)
break
self.results.extend(onepage)
self.allresults.extend(onepage)
if not self.check_element_exist(check_type='CLASS_NAME', value='gs_ico_nav_next'):
print('>> 全部结束')
break
self.__scroll2bottom()
time.sleep(0.1)
self.driver.find_element(by=By.CLASS_NAME, value="gs_ico_nav_next").click()
time.sleep(delay)
def close_browser(self):
# 关闭浏览器
self.driver.quit()
def save_file(self, filename='scholar.xlsx', nodup=False):
unique_data = self.results
if nodup:
# 根据href字段进行去重
unique_data = [dict(t) for t in {tuple(d.items()) for d in unique_data}]
print(f'>> 去重效果：{len(self.results)} => {len(unique_data)}')
print(os.path.join(self.out_filepath, filename))
#pyperclip.copy(str(unique_data))
unique_data = pd.DataFrame(unique_data).sort_values(by='cited',ascending=False).dropna().reset_index(drop=True)
unique_data.dropna().reset_index(drop=True).to_excel(os.path.join(self.out_filepath, filename), index=False)#, encoding='utf-8'
def statistical_information(self):
pass
nltk.download('punkt')
nltk.download('stopwords')
keywords = input('>> 请输入搜索关键词: ').strip()
max_pages = '100'
sort_bydate = False
root = '_'.join(keywords.replace('"', '').replace(':', '').split())
if not os.path.exists(root):
os.mkdir(root)
scholar = Scholar()
scholar.start_browser(wait_time=60)
out_filepath=os.path.join(root)
scholar.get_path(out_filepath)
scholar.search(keywords,max_pages=int(max_pages), delay=random.randint(0, 0))
if len(scholar.results):
scholar.save_file(nodup=True)
print('>> done <<')
scholar.close_browser()
unique_data = pd.DataFrame(scholar.allresults).sort_values(by='cited', ascending=False).dropna().reset_index(drop=True)
unique_data.drop_duplicates(subset=['title'])
unique_data.dropna().reset_index(drop=True).to_excel(os.path.join(root, 'scholar.xlsx'),index=False) # , encoding='utf-8'
file_path = os.path.join(root, 'scholar.xlsx')
df = pd.read_excel(file_path)
df_sorted = df.sort_values(by='cited', ascending=False)
df_sorted.to_excel(file_path, index=False)
print('>> all done <<')