Python- Compute the sum of numerical characters of every string in a dataframe

Question

so I have a dataframe with a column "dname". It contains many rows of 2LD domain names. ie [123ask , example92 , what3ver] .

I want to find the number of digits for every string in every row.

So, to create a new column in the dataframe with values ie [3 , 2 , 1] .

I have:

df['numeric']= sum (x.isdigit() for b in df['dname'] for x in b)

And all i get is 6 6 6 instead of 3 2 1

Any help ? Thanks in advance!

Answer 1

You almost had it.

df = {'dname':["123ask", "example92" , "what3ver"]}
df['numeric'] = [sum (x.isdigit()  for x in b) for b in df['dname']]
print df['numeric']
#>>> [3, 2, 1]

Answer 2

    df['numeric']= df['dname'].apply(lambda v : sum(x.isdigit() for x in v))

这会将所需的操作应用于所有行，并且速度更快