Calculating the sum of the quantities of one dataframe based on dates in another dataframe (Python)

Suppose I have a first df like this: df1: item date1 date2 1 2020-06-21 2020-06-28 2 2020-05-13 2020-05-24 3 2020-06-20 2020-06-28 I also have a second df (df2)…

How to format a mysql datetime yyyy-mm-dd to dd-mm-yyyy in Python?

My python code retrieves a datetime column from a mySql server database. I can print the datetime as it is stored on the server (ex. 2018-10-22, however I need to print it in a more readable way like …

Amount of months calculation in DataFrame in Python Pandas?

I have DataFrame like below: df = pd.DataFrame({“ID” : [“1”, “2”, “3”], “Date” : [“12/11/2020”, “12/10/2020”, &…

How to fix ValueError: time data ’18/02/2020 20:14:31′ does not match format ‘%d/%m/%y %H:%M:%S’ in Python?

I am developing a web application with Flask Python. I have a Mysql table with a text column date: — date — 10/06/2020 18:50:17 10/06/2020 18:55:10 28/05/2020 22:18:06 29/03/2020 20:47:01 29/03/2020 …

How to use pd.data_range() with a frequency of X minutes/hours/seconds?

I need to create a frequent date range with pandas date_range(). This works well with frequency=… parameter. But sometimes my code needs these frequent ranges in longer frequencys. for example 4 …

Pandas DataFrame mean of data in columns occurring before certain date time

I have a dataframe with ID’s of clients and their expenses for 2014-2018. What I want is to have the mean of the expenses per ID but only the years before a certain date can be taken into account when calculating the mean value (so column ‘Date’ dictates which columns can be taken into account for the mean). Example: for index 0 (ID: 12), the date states ‘2016-03-08’, then the mean should be taken from the columns ‘y_2014’ and ‘y_2015’, so then for this index, the mean is 111.0. If the date is too early (e.g. somewhere in 2014 or

How to add current date with string like ‘1 hour and 5 second ‘ in python

I have to add datetime lik ‘2019-10-18 11:46:08 ‘+ ‘5 hour 5 second’, 5 hour 5 second is coming from the database and this is not fixed what will be it ie time will be like (15 min, 1 hour 15 min etc) i have tried many thing but getting error how to solve this Answer Firstly store separately the datetime string and the offset you want to add to the datetime: Parse the datetime and offset strings: Add the offset to the datetime as a timedelta:

How to convert Julian date to standard date?

I have a string as Julian date like “16152” meaning 152’nd day of 2016 or “15234” meaning 234’th day of 2015. How can I convert these Julian dates to format like 20/05/2016 using Python 3 standard …

How to have Calendar thing in Django date field

I have this Datetime field in Django update_date = models.DateField() But I want the Calendar to pop up. In docs, they say to write this class CalendarWidget(forms.TextInput): class Media: …

Checking date against date range in Python

I have a date variable: 2011-01-15 and I would like to get a boolean back if said date is within 3 days from TODAY. Im not quite sure how to construct this in Python. Im only dealing with date, not datetime. My working example is a “grace period”. A user logs into my site and if the grace period is within 3 days of today, additional scripts, etc. are omitted for that user. I know you can do some fancy/complex things in Python’s date module(s) but Im not sure where to look. Answer In Python to check a range you