/Python/Pandas assign multiple columns at once

Pandas assign multiple columns at once

Set dtype for multiple columns pandas

import pandas as pd

df = pd.DataFrame({'id':['a1', 'a2', 'a3', 'a4'],
  				   'A':['0', '1', '2', '3'],
                   'B':['1', '1', '1', '1'],
                   'C':['0', '1', '1', '0']})

df[['A', 'B', 'C']] = df[['A', 'B', 'C']].apply(pd.to_numeric, axis = 1)

Pandas assign multiple columns at once

df = pd.DataFrame({'col1':[0,1,2], 'col2':[0,1,2], 'col3':[0,1,2]})

df
   col1  col2  col3
0     0     0     0
1     1     1     1
2     2     2     2

df['col1'], df['col2'], df['col3'] = zip(*df.apply(lambda r: (1, 2, 3), axis=1))

df
   col1  col2  col3
0     1     2     3
1     1     2     3
2     1     2     3

Assign multiple columns pandas

import pandas as pd

df = {'col_1': [0, 1, 2, 3],
        'col_2': [4, 5, 6, 7]}
df = pd.DataFrame(df)

df[[ 'column_new_1', 'column_new_2','column_new_3']] = [np.nan, 'dogs',3]  #thought this wo

Source: edureka.co

Similar codes

0 vote225 views1 answer
Python initialise list of lists
Python
1 vote249 views1 answer
Get every item but the last item of python list
Python
-1 vote229 views1 answer
Jupyter notebook show full dataframe cell
Python
0 vote214 views1 answer
Select only object columns pandas
Python
1 vote248 views1 answer
ValueError: There may be at most 1 Subject headers in a message
Python
0 vote220 views1 answer
Django x-frame-options allowall
Python
-1 vote251 views1 answer
Calculate quantiles python
Python
17 votes239 views3 answers
No module named 'rest_framework'
Python
2 votes309 views2 answers
TypeError: dict is not a sequence
Python
4 votes223 views4 answers
Count unique elements in list python
Python