【发布时间】：2016-12-19 22:14:16
【问题描述】：
我有一个来自 excel 电子表格的数据框，我在其中找到了每个域出现的频率。我想将域频率计数添加到它的相应域。
index domain extractor Frequency
0 linkedin.com skipped 2
1 facebook.com skipped 5
2 hi5.com skipped 1
....
这是查找频率并尝试将其添加到相应域的代码。
cnt = Counter()
for row_index, row in df.iterrows():
cnt[row['domain']] += 1
for i in cnt:
frequency = cnt
if i in row['domain']:
df['Frequency'] = df.loc[:(cnt[i])]
当我从数据框中打印出频率时：
Index url Frequency
0 https://www.linkedin.com/in/dgerstenblatt 0
1 http://www.linkedin.com/in/darren-cfbs-5465872 1
2 http://www.hi5.com/friend/p39168004--profile--... 2
3 http://license.reg.state.ma.us/pubLic/pubLicen... 3
4 http://license.reg.state.ma.us/pubLic/pubLicen... 4
5 http://profiles.friendster.com/3523606 5
6 http://www.lenoxadvisors.com/biographies/darre... NaN
7 http://10digits.us/n/Darren_Gerstenblatt/Newto... NaN
8 http://www.facebook.com/people/_/692786728 NaN
【问题讨论】：