Pandas KeyError: value not in index

Question

I have the following code,

df = pd.read_csv(CsvFileName)

p = df.pivot_table(index=[\'Hour\'], columns=\'DOW\', values=\'Changes\', aggfunc=np.mean).round(0         


        

Answer 1

I had a very similar issue. I got the same error because the csv contained spaces in the header. My csv contained a header "Gender " and I had it listed as:

[['Gender']]

If it's easy enough for you to access your csv, you can use the excel formula trim() to clip any spaces of the cells.

or remove it like this

df.columns = df.columns.to_series().apply(lambda x: x.strip())