Pandas change to first day

df['day'] = df['day'].map(lambda x: pd.datetime(x.year, x.month, 1))
print (df)
         day
0 2016-07-01
1 2016-08-01
2 2016-09-01
3 2016-10-01
4 2016-11-01

Source: stackoverflow.com

Similar codes

0 vote189 views2 answers
Numpy array into tuple
Python
1 vote251 views2 answers
Run flask in background
Python Flask
0 vote190 views1 answer
How to deploy a file size greater than 100mb on pythonanywhere
Python
0 vote200 views1 answer
How to make py file open in current directory
Python
14 votes240 views1 answer
Pandas cheat sheet pdf
Python
0 vote213 views1 answer
While importing we detected an older version of numpy in
Python
0 vote192 views1 answer
Python global variable unboundlocalerror
Python
7 votes159 views6 answers
Hello world in python
Python
5 votes217 views3 answers
Strptime python
Python
2 votes191 views1 answer
Get input pandas
Python