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值我有這樣熊貓/ numpy的地圖柱根據另一列
zip state
95648 CA
95683 CA
95648 NaN
95648 CA
95649 CA
輸入我想通過從拉鍊減少填充狀態的值。 輸出應該是:
zip state
95648 CA
95683 CA
95648 **CA**
95648 CA
95649 CA
現在,我已經試過這樣:
1. creating a map
2. take a copy of zip column as zip1.
3. replacing values of zip with state
4. swap all and delete zip1
但尋找一個更好的方式。 加載的值成數據(如數據幀)
map1 = data[['zip','state']]
map1 = data.set_index('zip')['state'].to_dict()
打印(MAP1)產生:{95838: 'CA',95823: 'CA',95815: 'CA',95834: 'CA',95828:' CA'}
data['zip1'] = data['zip']
data = data.replace({"zip": map1})
print (data.head(10))
data['state'] = data['zip']
data['zip'] = data['zip1']
data = data.drop(['zip1'],axis=1)
print (data.head(10))