error in timestamp

[Led_Zeppelin]

I agree that all timestamps are not the same. When the program runs the following code

# Convert timestamp column into data type into datetime
df['timestamp'] = pd.to_datetime(df['timestamp'])

things change. I just do not see how they change. It seems it is converting a scalar in timestamp to ...what?
That is the cause of this error but removing this statement will not fix the error. You just get another error; that error is different.

Now the statement

 Assign values to series
for i in tqdm(range(df.shape[0])):
    if (df["timestamp"][i].hour >= 4) and (df[timestamp][i].hour < 10):
        time_period[i]="Morning"  

Will fail when because timestamp is changed. But changed to what? If I knew the answer to the first question then I could make an educated guess.

Any help such as a hint appreciated.

Thanks in advance.

Respectfully,

LZ