將python列表值寫入csv文件

Question

我正在嘗試將生成的列表導出到csv文件，其中網站表中的每一行對應於文件中的新行，並且每個值都在單個單元格中，例如：

NAME ..... ICO DATE .... ICO PRICE .... CURR。 價格...... 24 HR HRI Stratis ..... 06/20/16 ....... $ 0.007 ........... $ 7.480 ........... ..... + 38.80％

當前輸出如下所示：

[ 'Patientory \\ N05 /一十七分之三十一\\ n $的0.104 \\ N $ 0.274 \\ N + 46.11％\\ N + 25.54％\\ NN / A']

import csv
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.ui import WebDriverWait as wait

csvrows = []

def get_css_sel(selector):
    posts = browser.find_elements_by_css_selector(selector)
    for post in posts:
        print(post.text)
        csvrows.append([post.text])

browser = webdriver.Chrome(executable_path=r'C:\Scrapers\chromedriver.exe')
browser.get("https://icostats.com")
wait(browser, 20).until(EC.presence_of_element_located((By.CSS_SELECTOR, "#app > div > div.container-0-16 > div.table-0-20 > div.tbody-0-21 > div:nth-child(2) > div:nth-child(8)")))

get_css_sel("#app > div > div.container-0-16 > div.table-0-20 > div.tableheader-0-50")              #fetch header of table
get_css_sel("#app > div > div.container-0-16 > div.table-0-20 > div.tbody-0-21 > div")              #fetch rows of table

def create_csv(thelist):
    with open('ICO.csv', 'w') as myfile:
        for i in thelist:
            wr = csv.writer(myfile, quoting=csv.QUOTE_ALL)
            wr.writerow([i])

create_csv(csvrows)

Answer 1

在get_css_sel() ，每個post.text包含由換行符分隔的行文本\\n - 與輸出示例相同。 因此，附加[post.text]附加一個列表，其中包含整行的單個項目。 改為：

csvrows.append(post.text.split('\n'))  # remove the extra list brackets
                                       # since split returns a list.

例如：

>>> y = 'Patientory\n05/31/17\n$0.104\n$0.274\n+46.11%\n+25.54%\nN/A'
>>> y.split('\n')
['Patientory', '05/31/17', '$0.104', '$0.274', '+46.11%', '+25.54%', 'N/A']

另外，在你的寫入循環中，你不應該為每一行重新創建csv.writer ，只需在循環遍歷thelist之前執行一次。

既然你在csvrows擁有了你想要的所有行，你可以直接使用csvwriter.writerows 。

def create_csv(thelist):
    with open('ICO.csv', 'w') as myfile:
        wr = csv.writer(myfile, quoting=csv.QUOTE_ALL)
        wr.writerows(thelist)

Answer 2

試試這段代碼：

import csv
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.ui import WebDriverWait as wait

csvrows = []
def get_css_sel(selector):
    posts = browser.find_elements_by_css_selector(selector)
    for post in posts:
        print(post.text)
        csvrows.append(post.text)

browser = webdriver.Chrome(executable_path=r'//Users/Pranavtadepalli/Downloads/chromedriver')
browser.get("https://icostats.com")
wait(browser, 20).until(EC.presence_of_element_located((By.CSS_SELECTOR, "#app > div > div.container-0-16 > div.table-0-20 > div.tbody-0-21 > div:nth-child(2) > div:nth-child(8)")))

get_css_sel("#app > div > div.container-0-16 > div.table-0-20 > div.tableheader-0-50")              #fetch header of table
get_css_sel("#app > div > div.container-0-16 > div.table-0-20 > div.tbody-0-21 > div")              #fetch rows of table
new=[",".join(elem.split("\n")) for elem in csvrows]
newfile=open("csvfile.csv",'r')
newfile1=open("csvfile.csv",'w')
newstuff=newfile.read()
for elem in new:
    newfile1.write(elem+'\n')
newfile1.close()
newfile.close()