How to get a value from a cell of a dataframe

Question

I have constructed a condition that extract exactly one row from my data frame   d2   df  df  l ext    l ext   amp   df  item    item   amp   df  wn    wn   amp   df  wd    1     Now I would like to take a value from a particular column   val   d2  col name     But as a result I get a data frame that contains one row and one column  i e  one cell   It is not what I need  I need one value  one float number   How can I do it in pandas

User · Answer

You can turn your 1x1 dataframe into a numpy array  then access the first and only value of that array   val   d2  col name   values 0

User · Answer

It looks like changes after pandas 10 1 13 1  I upgraded from 10 1 to 13 1  before iloc is not available   Now with 13 1  iloc 0   label   gets a single value array rather than a scalar   Like this   lastprice stock iloc -1   Close     Output   date 2014-02-26 118 2 name Close  dtype  float64

User · Answer

I needed the value of one cell  selected by column and index names  This solution worked for me   original conversion frequency loc 1    values 0

User · Answer

It doesn t need to be complicated   val   df loc df wd  1   col name   values 0

User · Answer

To get the full row s value as JSON  instead of a Serie   row   df iloc 0   Use the to json method like bellow  row to json

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These are fast access for scalars  In  15   df   pandas DataFrame numpy random randn 5 3  columns list  ABC     In  16   df Out 16              A         B         C 0 -0 074172 -0 090626  0 038272 1 -0 128545  0 762088 -0 714816 2  0 201498 -0 734963  0 558397 3  1 563307 -1 186415  0 848246 4  0 205171  0 962514  0 037709  In  17   df iat 0 0  Out 17   -0 074171888537611502  In  18   df at 0  A   Out 18   -0 074171888537611502

User · Answer

df gdp columns      Index  u Country   u Country Code   u Indicator Name   u Indicator Code            u 1960   u 1961   u 1962   u 1963   u 1964   u 1965   u 1966   u 1967            u 1968   u 1969   u 1970   u 1971   u 1972   u 1973   u 1974   u 1975            u 1976   u 1977   u 1978   u 1979   u 1980   u 1981   u 1982   u 1983            u 1984   u 1985   u 1986   u 1987   u 1988   u 1989   u 1990   u 1991            u 1992   u 1993   u 1994   u 1995   u 1996   u 1997   u 1998   u 1999            u 2000   u 2001   u 2002   u 2003   u 2004   u 2005   u 2006   u 2007            u 2008   u 2009   u 2010   u 2011   u 2012   u 2013   u 2014   u 2015            u 2016            dtype  object     df gdp df gdp  Country Code       USA    1996   values 0       8100000000000 0

User · Answer

Not sure if this is a good practice  but I noticed I can also get just the value by casting the series as float   e g   rate      3    0 042679      Name  Unemployment rate  dtype  float64   float rate       0 0426789

User · Answer

For pandas 0 10  where iloc is unavalable  filter a DF and get the first row data for the column VALUE   df filt   df df  C1      C1val  amp  df  C2      C2val  result   df filt get value df filt index 0   VALUE     if there is more then 1 row filtered  obtain the first row value  There will be an exception if the filter result in empty data frame

User · Answer

If you have a DataFrame with only one row  then access the first  only  row as a Series using iloc  and then the value using the column name   In  3   sub df Out 3             A         B 2 -0 133653 -0 030854  In  4   sub df iloc 0  Out 4   A   -0 133653 B   -0 030854 Name  2  dtype  float64  In  5   sub df iloc 0   A   Out 5   -0 13365288513107493

User · Answer

Converting it to integer worked for me  int sub df iloc 0

User · Answer

Most answers are using iloc which is good for selection by position   If you need selection-by-label loc would be more convenient      For getting a value explicitly  equiv to deprecated   df get value  a   A       this is also equivalent to df1 at  a   A   In  55   df1 loc  a    A    Out 55   0 13200317033032932

User · Answer

The quickest easiest options I have found are the following  501 represents the row index   df at 501  column name   df get value 501  column name

[python] How to get a value from a cell of a dataframe?

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