小编pyt*_*ice的帖子

我pytrends用来自动csv从谷歌趋势下载数据。我使用的代码如下。在这种情况下，我正在下载从 2008 年到现在的每月谷歌趋势数据。

from pytrends.request import TrendReq
from urllib.parse import unquote
from dateutil.relativedelta import relativedelta
import datetime
import pytrends

google_username = "xxxxx@gmail.com"
google_password = "xxxxx"

search_term = unquote('%2Fm%2F07gyp7')
google_trend = TrendReq(google_username, google_password, custom_useragent='Pytrends'  )
google_trend_payload = {'gprop' : 'news' , 'q': search_term}
trendresult = TrendReq.trend(google_trend_payload, return_type = 'dataframe')
print(trendresult)

google 网站前 5 个月的结果与 pytrends 的结果对比：

Date          Pytrends data          Manual csv data
2008-01       21.0                   28.0
2008-02       16.0                   19.0
2008-03       16.0                   21.0
2008-04       15.0                   18.0
2008-05       22.0                   31.0 …

我有下面的代码，但它os.mkdir不适用于我的。编译不会返回任何错误，但运行代码不会创建文件夹。

def folder():
    timenow = datetime.now().strftime('%Y-%m-%d_%H%M%S')
    folderpath = os.path.join(currentpath,"folder",str(timenow))
    if os.path.exists(folderpath) == False:
        os.mkdir(folderpath)
    return

我有这个 sample.csv 文件：

a   1   apple
b   2   banana
c   3   cranberry
d   4   durian
e   5   eggplant

并有以下代码：

samplefile = open(sample.csv,'rb')
rows = samplefile .readlines()
outputfile = open(output.csv,'wb')
wr = csv.writer(outputfile)
for row in rows:
     wr.writerow(row)

我想要的是在 for 循环期间的某个时刻写入 outputfile 的第一行，即当 outputfile 可能已经有条目时。

我使用这个轮文件pytrends.whl和下面的目录安装了pytrends

 Directory of C:\Python35\Lib\site-packages\pytrends

09/15/2016  10:30 AM    <DIR>          .
09/15/2016  10:30 AM    <DIR>          ..
09/15/2016  10:30 AM             6,799 request.py
09/15/2016  10:30 AM                 0 __init__.py
09/15/2016  10:30 AM    <DIR>          __pycache__
               2 File(s)          6,799 bytes
               3 Dir(s)  323,016,486,912 bytes free

和

 Directory of C:\Python35\Lib\site-packages\pytrends-3.1.0.dist-info

09/15/2016  10:30 AM    <DIR>          .
09/15/2016  10:30 AM    <DIR>          ..
09/15/2016  10:30 AM             7,900 DESCRIPTION.rst
09/15/2016  10:30 AM                 4 INSTALLER
09/15/2016  10:30 AM             8,622 METADATA
09/15/2016  10:30 AM               878 metadata.json
09/15/2016  10:30 AM               835 RECORD
09/15/2016 …