Resolved: Is it Necessary to loop in Pandas DataFrames ?
in 4:17 min in this video (cell# 30), why did you use for loop in this code?
sales_data['offsetUTC'] = [list_mos_timestamp[0].utcoffset().total_seconds()/3600 for i in range(len(sales_data))]
my understanding is, one of the big advantages of Pandas is the DataFrame brodcasing operations. i.e no need for looping in DataFrames
sales_data['offsetUTC'] = list_mos_timestamp[0].utcoffset().total_seconds()/3600
Hi Yahia!
Thanks for reaching out.
Should we only refer to the first value in list_mos_timestamp (which is list_mos_timestamp[0]), then your remark is spot on. Indeed, that's the expression we use to obtain a single value (-0.5):
list_mos_timestamp[0].utcoffset().total_seconds()/3600
Then, since we want to apply the .utcoffset() method to all values from list_mos_timestamp, we use the iterator variable i in the expression, instead of the first value only:
sales_data['offsetUTC'] = [list_mos_timestamp[i].utcoffset().total_seconds()/3600 for i in range(len(sales_data))]
Hope this helps.
Best,
Martin
