相关疑难解决方法(0)

假设我在Python3.x中有以下pandas DataFrame

import pandas as pd

dict1 = {'name':['dog', 'dog', 'cat', 'cat', 'cat', 'bird', 'bird', 'bird', 'bird'], 'number':[42, 42, 42, 42, 42, 42, 42, 42, 42], 'count':[1, 2, 4, 5, 7, 1, 2, 5, 8]} 
df = pd.DataFrame(dict1)

print(df)
##    name  number  count
## 0   dog      42      1
## 1   dog      42      2
## 2   cat      42      4
## 3   cat      42      5
## 4   cat      42      7
## 5  bird      42      1
## 6  bird      42      2
## 7 …