Hi

I have a data frame as below



  t1 t1 t3 t4  len1 AA AA PP AP  len2 FALSE AA PP MM  len3 PP AA AA AP  len4
PP AM MP PP  len5 AA FALSE AP PP  len6 PP AA AA AA
I am having trouble extracting only those rows which have "PP" in the first
column but AA or FALSE or all any other value but not PP in rest of the
columns.


-- 
*Chirag Gupta*

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