问题遇到的现象和发生背景
无法将数据可视化
问题相关代码,请勿粘贴截图
#coding=gbk
from selenium import webdriver
import time
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
import re
import pandas as pd
import lxml.html
import xlwt
opt = Options()
opt.add_experimental_option('excludeSwitches', ['enable-automation'])
opt.add_argument('--disable-blink-features')
opt.add_argument('--disable-extensions')
opt.add_argument('--disable-blink-features=AutomationControlled')
driver = webdriver.Chrome(options=opt) # 创建driver对象
driver.get('https://www.acfun.cn/u/1075162') #打开页面
html=driver.page_source #访问整个页面的内容
time.sleep(2)
driver.close() #关闭页面
xp=lxml.html.fromstring(html) #lxml对象
units=xp.xpath('//figcaption') #没有text()
df = pd.DataFrame()
df = None
for u in units:
w = {}
w["标题"]=u.xpath('./p [@class="title line"]/text()')[0]
w["观看与弹幕"]=u.xpath('./p [@class="play-info"]/text()')[0]
w["日期"] = u.xpath('./p [@class="date"]/text()')[0]
if w["标题"]==[]:
print('无')
df1 = pd.DataFrame([w])
df = pd.concat([df,df1], ignore_index=True)
a = re.findall(r'\d+[.]\d+', w["观看与弹幕"])[0]
print(a)
print(df)
import pandas as pd
df=pd.DataFrame({'观看量':[a]},index=[w["标题"]])
import matplotlib.pyplot as plt
plt.rcParams['font.sans-serif'] = ['SimHei'] # 指定默认字体
df[['观看量']].plot(kind='bar')
plt.show()
运行结果及报错内容
Traceback (most recent call last):
File "C:\Users\86159\AppData\Roaming\JetBrains\PyCharmCE2022.1\scratches\scratch_5.py", line 65, in
df[['观看量']].plot(kind='bar')
File "C:\Users\86159\PycharmProjects\pythonProject9\venv\lib\site-packages\pandas\plotting_core.py", line 972, in call
return plot_backend.plot(data, kind=kind, **kwargs)
File "C:\Users\86159\PycharmProjects\pythonProject9\venv\lib\site-packages\pandas\plotting_matplotlib_init_.py", line 71, in plot
plot_obj.generate()
File "C:\Users\86159\PycharmProjects\pythonProject9\venv\lib\site-packages\pandas\plotting_matplotlib\core.py", line 327, in generate
self._compute_plot_data()
File "C:\Users\86159\PycharmProjects\pythonProject9\venv\lib\site-packages\pandas\plotting_matplotlib\core.py", line 506, in _compute_plot_data
raise TypeError("no numeric data to plot")
TypeError: no numeric data to plot
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