C. elegans cell names including numbers sometimes do and sometimes don't have 0s in the middle for sorting purposes. Interconvert them with these functions.

full_mapping.csv

node_zero_handling.py

import re

zero_re = re.compile('(?<=[A-Z])0(?=[1-9])')
no_zero_re = re.compile('(?<=[A-Z])(?=[1-9]$)')

def ensure_mid_zero(s):
    return no_zero_re.sub('0', s)
  
def ensure_no_mid_zero(s):
    return zero_re.sub('', s)