melt() got an unexpected keyword argument 'ignore_index'
时间: 2023-07-30 12:10:51 浏览: 66
This error message usually occurs because you are using an older version of the Pandas library. The `ignore_index` parameter for the `melt()` function was introduced in Pandas version 1.1.0. If your Pandas version is lower than this, you will see this error message.
One solution is to upgrade Pandas to the latest version. You can do this by running the following command:
```
pip install --upgrade pandas
```
If you are unable to upgrade Pandas, you can achieve a similar effect using the `reset_index()` function. For example, you can replace your `melt()` function with the following code:
```
df = df.melt(id_vars='id')
df = df.reset_index(drop=True)
```
This will preserve the `id` column as a column, convert the other columns to a long format, and reset the index to consecutive integers.
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