sorting by column in pandas
# Python, Pandas
# Sorting dataframe df on the values of a column col1
# Return sorted array without modifying the original one
df.sort_values(by=["col1"])
# Sort the original array permanently
df.sort_values(by=["col1"], inplace = True)df sort values
>>> df.sort_values(by=['col1'], ascending = False)
col1 col2 col3
0 A 2 0
1 A 1 1
2 B 9 9
5 C 4 3
4 D 7 2
3 NaN 8 4dataframe sort values descending
df.sort_values(by='field_name',ascending=False)sort a dataframe by a column valuepython
>>> df.sort_values(by=['col1'])
col1 col2 col3
0 A 2 0
1 A 1 1
2 B 9 9
5 C 4 3
4 D 7 2
3 NaN 8 4reverse column order pandas
import pandas as pd
df = pd.DataFrame({'a':[1,2,3],
'b':[4,5,6,],
'c':[7,8,9,]})
df_col_reversed = df.loc[:, ::-1] # reverse column order
df_row_reversed = df.loc[::-1, :] # reverse row orderCopyright © 2021 Codeinu
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