create a series from values of a column in a dataframe

Question

I have a dataframe, df:

col_name    col_value
abc         34
def         0.76
lmn         6
xyz         80

I want to create a series by selecting 2 values of col_name column in df: ind = ['abc', 'def']

what i tried so far:

ind = ['abc', 'def']
x = pd.Series(df['value', index = ind]