Python安装与小demo测试

本文介绍了如何在Windows 7 64位系统上安装32位Python及PyScripter开发工具,并通过解决bs4模块缺失的问题,成功运行了一个获取空气质量指数(AQI)的Python脚本。

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1、下载Python 和 第三方开发工具PyScripter
这里写图片描述
2、安装
电脑(Win7 64bit)刚开始安装的是64位的Python,后来发现PyScript是32位的(在安装的时候选择下一步的时候有说明是32位),和64位Python无法匹配。后来之好安装32位的Python了(没有找到64位的PyScript)

两个都是默认安装,位置可以设置到D盘

配置环境变量 path 里面添加Python的安装位置,如:D:\Python27

cmd下查看是否安装成功,输入python回车,会有相应的版本号和位数

3、打开PyCript,网上搜个Python的天气代码

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# by ustcwq

import urllib2
import threading
from time import ctime
from bs4 import BeautifulSoup

def getPM25(cityname):
    site = 'http://www.pm25.com/' + cityname + '.html'
    html = urllib2.urlopen(site)
    soup = BeautifulSoup(html)

    city = soup.find(class_ = 'bi_loaction_city')   # 城市名称
    aqi = soup.find("a",{"class","bi_aqiarea_num"})  # AQI指数
    quality = soup.select(".bi_aqiarea_right span")  # 空气质量等级
    result = soup.find("div",class_ ='bi_aqiarea_bottom')   # 空气质量描述

    print city.text + u'AQI指数:' + aqi.text + u'\n空气质量:' + quality[0].text + result.text
    print '*'*20 + ctime() + '*'*20

def one_thread():   # 单线程
    print 'One_thread Start: ' + ctime() + '\n'
    getPM25('hefei')
    getPM25('shanghai')

def two_thread():   # 多线程
    print 'Two_thread Start: ' + ctime() + '\n'
    threads = []
    t1 = threading.Thread(target=getPM25,args=('hefei',))
    threads.append(t1)
    t2 = threading.Thread(target=getPM25,args=('shanghai',))
    threads.append(t2)

    for t in threads:
        # t.setDaemon(True)
        t.start()


if __name__ == '__main__':

    one_thread()
    print '\n' * 2
    two_thread()

运行报错了!!!!
ImportError: No module named ‘bs4’问题

4、需要下载 bs4,(有的用pip,没有尝试)这里使用的是 easy_install

切换到 D:\Python27\Scripts 执行以下命令:

这里写图片描述

好了,bs4下载完毕!

5、再次运行python文件吧

这里写图片描述

成功输出了!!! ^_^

文件: import scrapy from demo1.items import Demo1Item import urllib from scrapy import log # BOSS直聘网站爬虫职位 class DemoSpider(scrapy.Spider): # 爬虫名, 启动爬虫时需要的参数*必填 name = 'demo' # 爬取域范围,允许爬虫在这个域名下进行爬取(可选) allowed_domains = ['zhipin.com'] # 爬虫需要的url start_urls = ['https://www.zhipin.com/c101280600/h_101280600/?query=测试'] def parse(self, response): node_list = response.xpath("//div[@class='job-primary']") # 用来存储所有的item字段 # items = [] for node in node_list: item = Demo1Item() # extract() 将xpath对象转换为Unicode字符串 href = node.xpath("./div[@class='info-primary']//a/@href").extract() job_title = node.xpath("./div[@class='info-primary']//a/div[@class='job-title']/text()").extract() salary = node.xpath("./div[@class='info-primary']//a/span/text()").extract() working_place = node.xpath("./div[@class='info-primary']/p/text()").extract() company_name = node.xpath("./div[@class='info-company']//a/text()").extract() item['href'] = href[0] item['job_title'] = job_title[0] item['sa 报错: C:\Users\xieqianyun\AppData\Local\Programs\Python\Python36\python.exe "C:\Users\xieqianyun\PyCharm Community Edition 2019.2.5\helpers\pydev\pydevconsole.py" --mode=client --port=55825 import sys; print('Python %s on %s' % (sys.version, sys.platform)) sys.path.extend(['C:\\Users\\xieqianyun\\demo1', 'C:/Users/xieqianyun/demo1']) Python 3.6.5 (v3.6.5:f59c0932b4, Mar 28 2018, 17:00:18) [MSC v.1900 64 bit (AMD64)] Type 'copyright', 'credits' or 'license' for more information IPython 7.10.0 -- An enhanced Interactive Python. Type '?' for help. PyDev console: using IPython 7.10.0 Python 3.6.5 (v3.6.5:f59c0932b4, Mar 28 2018, 17:00:18) [MSC v.1900 64 bit (AMD64)] on win32 runfile('C:/Users/xieqianyun/demo1/demo1/begin.py', wdir='C:/Users/xieqianyun/demo1/demo1') Traceback (most recent call last): File "C:\Users\xieqianyun\AppData\Local\Programs\Python\Python36\lib\site-packages\IPython\core\interactiveshell.py", line 3319, in run_code exec(code_obj, self.user_global_ns, self.user_ns) File "<ipython-input-2-fc5979762143>", line 1, in <module> runfile('C:/Users/xieqianyun/demo1/demo1/begin.py', wdir='C:/Users/xieqianyun/demo1/demo1') File "C:\Users\xieqianyun\PyCharm Community Edition 2019.2.5\helpers\pydev\_pydev_bundle\pydev_umd.py", line 197, in runfile pydev_imports.execfile(filename, global_vars, local_vars) # execute the script File "C:\Users\xieqianyun\PyCharm Community Edition 2019.2.5\helpers\pydev\_pydev_imps\_pydev_execfile.py", line 18, in execfile exec(compile(contents+"\n", file, 'exec'), glob, loc) File "C:/Users/xieqianyun/demo1/demo1/begin.py", line 3, in <module> cmdline.execute('scrapy crawl demo'.split()) File "C:\Users\xieqianyun\AppData\Local\Programs\Python\Python36\lib\site-packages\scrapy\cmdline.py", line 145, in execute cmd.crawler_process = CrawlerProcess(settings) File "C:\Users\xieqianyun\AppData\Local\Programs\Python\Python36\lib\site-packages\scrapy\crawler.py", line 267, in __init__ super(CrawlerProcess, self).__init__(settings) File "C:\Users\xieqianyun\AppData\Local\Programs\Python\Python36\lib\site-packages\scrapy\crawler.py", line 145, in __init__ self.spider_loader = _get_spider_loader(settings) File "C:\Users\xieqianyun\AppData\Local\Programs\Python\Python36\lib\site-packages\scrapy\crawler.py", line 347, in _get_spider_loader return loader_cls.from_settings(settings.frozencopy()) File "C:\Users\xieqianyun\AppData\Local\Programs\Python\Python36\lib\site-packages\scrapy\spiderloader.py", line 61, in from_settings return cls(settings) File "C:\Users\xieqianyun\AppData\Local\Programs\Python\Python36\lib\site-packages\scrapy\spiderloader.py", line 25, in __init__ self._load_all_spiders() File "C:\Users\xieqianyun\AppData\Local\Programs\Python\Python36\lib\site-packages\scrapy\spiderloader.py", line 47, in _load_all_spiders for module in walk_modules(name): File "C:\Users\xieqianyun\AppData\Local\Programs\Python\Python36\lib\site-packages\scrapy\utils\misc.py", line 73, in walk_modules submod = import_module(fullpath) File "C:\Users\xieqianyun\AppData\Local\Programs\Python\Python36\lib\importlib\__init__.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "<frozen importlib._bootstrap>", line 994, in _gcd_import File "<frozen importlib._bootstrap>", line 971, in _find_and_load File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 665, in _load_unlocked File "<frozen importlib._bootstrap_external>", line 678, in exec_module File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed File "C:\Users\xieqianyun\demo1\demo1\spiders\demo.py", line 4, in <module> from scrapy import log ImportError: cannot import name 'log'
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