使用python更新数据库特定列中的值

Question

I have a col called id in a dataframe called _newdata which looks like this. Note that this is a part of the values in the column and not the entire thing.

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1
1
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2
2
2
4
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5
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5
5
7
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8
8
10
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10

What I want to do is the make rename the 'id' with values so that it is in running numbers. Which means I want it to look like this

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1
1
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2
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3
3
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4
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7

I tried using this but it didn't seem to do anything to the file. Could someone tell me where I went wrong or suggest a method to do what I want it to do?

count = 1 #values start at 1
    for i, row in _newdata.iterrows():
        if row['id']==count or row['id']==count+1:
            pass

        else:
            count+=1
            row['id']=count

Answer 1

您可以使用致密 rank（） ：

df['id'] = df['id'].rank(method='dense').astype(int)