Python：从文件名中提取唯一ID

Question

I have a csv file that contains a list of authors in the MLA in the format.

df = pd.read_csv('file.csv')

If I check the column name I have:

df['name']

'van der Hilst, Rob, Chen, Min, Huang, Hui, Niu, Fenglin, Yao, Huajian'
'Malanotte-Rizzoli, Paola, Eltahir, Elfatih, Wei, Jun, Xue, Pengfei'
'Bowring, Samuel, Hoke, Gregory, Schmitz, Mark'

I want to extract the Firstname+Familyname and assign to it a unique ID. For instance I want Rob van der Hilst = 0 , Min Chen = 1 and so on.

Answer 1

if I understand your question correct, then you can take advantage of the python string sclicing and other fancy language features

here is the code and explanation:

load names

names = 'van der Hilst, Rob, Chen, Min, Huang, Hui, Niu, Fenglin, Yao, Huajian' + \
        'Malanotte-Rizzoli, Paola, Eltahir, Elfatih, Wei, Jun, Xue, Pengfei' + \
        'Bowring, Samuel, Hoke, Gregory, Schmitz, Mark'

split names on comma followed by space:

names = names.split(', ')

use python slicing to extract first and last names, names looks as follows: ['van der Hilst', 'Rob', 'Chen', 'Min', 'Huang' ...]

slicing takes the form of scalar[start:stop:steps], we thus start at the first first name and first larst name, and take steps of size 2 to get all the other last or first names, if 'stop' is empty it means 'continue til the end'

last_names = names[::2]
first_names = names[1::2]

finally we use a dictionary comprehention to map names to ids, to do this we use:

the zip function to stick last and first names together

the enumerate function to assign numbers

the '%s %s' to concatinate the first and last name

names = {'%s %s' % (fn, ln) : _id for _id, (fn, ln) in enumerate(zip(first_names, last_names))}

the final code is:

names = 'van der Hilst, Rob, Chen, Min, Huang, Hui, Niu, Fenglin, Yao, Huajian' + \
        'Malanotte-Rizzoli, Paola, Eltahir, Elfatih, Wei, Jun, Xue, Pengfei' + \
        'Bowring, Samuel, Hoke, Gregory, Schmitz, Mark'
names = names.split(', ')
last_names = names[::2]
first_names = names[1::2]

names = {'%s %s' % (fn, ln) : _id for _id, (fn, ln) in enumerate(zip(first_names, last_names))}