For the following data frame I want to filter data based on count value. I want to keep count 10, 5, and 2:
index      count
    1           10
    2           5
    3           2
    4           1
    5           6
    6           7
    7           "tab"
I know that I can write the code as
df[(df.count==10) | (df.count==5) | (df.count==2) |  (df.count=="tab")]
Is there any simpler way to do it? I have more than 20 values. I tried the following, but it did not work:
df[(df.count==[10, 5, 2, "tab"])
Thank you.
 
    