Python | Pandas tseries.offsets.CustomBusinessDay.rollback

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Dateoffsets are a standard kind of date increment used for a date range in Pandas. It works exactly like relativedelta in terms of the keyword args we pass in. DateOffsets work as follows, each offset specify a set of dates that conform to the DateOffset. For example, Bday defines this set to be the set of dates that are weekdays (M-F). DateOffsets can be created to move dates forward a given number of valid dates. For example, Bday(2) can be added to a date to move it two business days forward. If the date does not start on a valid date, first it is moved to a valid date and then offset is created. Pandas tseries.offsets.CustomBusinessDay.rollback() function roll provided date backward to next offset only if not on offset.

Syntax: pandas.tseries.offsets.CustomBusinessDay.rollback(dt) Parameter : dt : date Returns : rollback if not on offset

Example #1: Use pandas.tseries.offsets.CustomBusinessDay.rollback() function to rollback the given timestamp if it is not on offset.

Python3

# importing pandas as pd
import pandas as pd
 
# Creating Timestamp
ts = pd.Timestamp('2019-4-23 11:15:00')
 
# Create an offset
cbd = pd.tseries.offsets.CustomBusinessDay(weekmask = 'Mon Tue Wed')
 
# Print the Timestamp
print(ts)
 
# Print the Offset
print(cbd)

Output : Now we will add the offset to the given timestamp object to increment the datetime value. We will also roll back the given timestamp if it is not on offset.

Python3

# Adding the offset to the given timestamp
new_timestamp = ts + cbd
 
# Print the updated timestamp
print(new_timestamp)
 
# roll back if the given timestamp
# is not on offset
result = cbd.rollback(pd.Timestamp('2019-4-21 11:15:00'))
 
# print the result
print(result)

Output : As we can see in the output, we have successfully created an offset and added it to the given timestamp. We have also rollback the given timestamp as it is not on offset. Example #2: Use pandas.tseries.offsets.CustomBusinessDay.rollback() function to rollback the given timestamp if it is not on offset.

Python3

# importing pandas as pd
import pandas as pd
 
# Creating Timestamp
ts = pd.Timestamp('2019-4-23 11:15:00')
 
# Create an offset
cbd = pd.tseries.offsets.CustomBusinessDay(n = 3, weekmask = 'Mon Tue Wed Thu')
 
# Print the Timestamp
print(ts)
 
# Print the Offset
print(cbd)

Output : Now we will add the offset to the given timestamp object to increment the datetime value. We will also roll back the given timestamp if it is not on offset.

Python3

# Adding the offset to the given timestamp
new_timestamp = ts + cbd
 
# Print the updated timestamp
print(new_timestamp)
 
# roll back if the given timestamp
# is not on offset
result = cbd.rollback(pd.Timestamp('2019-4-21 11:15:00'))
 
# print the result
print(result)

Output : As we can see in the output, we have successfully created an offset and added it to the given timestamp. We have also rollback the given timestamp as it is not on offset.