Python | Pandas Series.dt.is_year_start

Series.dt can be used to access series values ​​as datetimelike and return multiple properties. Series.dt.is_year_start Pandas Series.dt.is_year_start returns a boolean indicating whether the date is the first day year.

Syntax: Series.dt.is_year_start

Parameter: None

Returns: numpy array

Example # 1: Use the Series.dt.is_year_start attribute to check if whether dates in the underlying data of this series object are the first day of the year.

# import pandas as pd

import pandas as pd

 
# Create series

sr = pd.Series ([ `2012-3-31` , ` 2019-1-1 12:30` , `2008-02-2 10:30` ,

`2010-1-1 09:25` , `2019-12-31 00:00` ])

 
# Create index

idx = [ `Day 1` , `Day 2` , ` Day 3` , `Day 4` , `Day 5` ]

  
# set index

sr.index = idx

 
# Convert baseline data to date and time

sr = pd.to_datetime (sr)

 
# Print series

print (sr)

Output:

Now we we will use the Series.dt.is_year_start attribute to check if the dates in this series object are the first day of the year or not.

# check if the dates are
# first day of the year

result = sr.dt.is_year_start

 
# print the result

print (result)

Output:

As we can see in the output, the attribute is Series.dt.is_year_start successfully accessed and returned boolean values ​​indicating whether dates are the first day of the year or not.

Example # 2: Use the Series.dt.is_year_start attribute to check if the dates in the underlying data of this series object are the first day of the year.

# import pandas as pd

import pandas as pd

 
# Create series

sr = pd.Series (pd.date_range ( `2012-1-1 00:00` , periods = 5 , freq = `D` ))

  
# Create index

idx = [ ` Day 1` , `Day 2` , ` Day 3` , `Day 4` , `Day 5` ]

  
# set index

sr.index = idx

 
# Print series

print (sr)

Output:

Now we will use the Series.dt.is_year_start attribute to check if the dates in a given series object are the first day of the year or not .

# check if the dates are
# first day of the year

result = sr.dt.is_year_start

 
# print the result

print (result)

Output:

As we can see in the output, the Series.dt.is_year_start successfully accessed and returned boolean values ​​indicating whether the dates are the first day of the year or not.