Answers for "df.set_index"

how to set index pandas

# assignment copy
df = df.set_index('month')

# or inplace
df.set_index('month', inplace=True)

#      year   sale  month            month  year   sale
#  0   2012   55    1                1      2012   55
#  1   2014   40    4       =>       4      2014   40
#  2   2013   84    7                7      2013   84
#  3   2014   31    10               10     2014   31

pandas create a column from index

df.reset_index(level=0, inplace=True)

pandas df make set index column

df.reset_index(inplace=True)
df = df.rename(columns = {'index':'new column name'})

how to change index in dataframe python

index = [1,2]
df.index = index

Pandas Set index

>>> college_idx = college.set_index('instnm')>>> sats = college_idx[['satmtmid', 'satvrmid']].dropna()>>> sats.head()