#!/bin/env python

import sys

# simulate file
# code "u" works; not "u2"
IN = """#
# keyword = code
index = u
name = 
mail_zipcode = c
full_phone_number = u2
#"""
infile = [ x for x in IN.split("\n") if not x.startswith('#') ]
print(infile)

vectors = {}

# functions
def ignore(*ignore):
    pass
def count(field,data):
    pass
def unique(field,data):
    pass
functions = {'c':count, 'u':unique, '':ignore}

works = True 
# process infile

def fix(s):  # workaround
    print(f'"{s}" == "u2" : {s == "u2"}' )
    if len(s) <= 1:
        return s
    return s[0]
    
def test1():  # fails on "u2" = expected (no func for "u2")
    print("\n>>>>>> test1: KeyError expected\n")
    vectors.update(
        [ [ func.strip(), functions[code.strip()] ]
          for [func,code] in [ each.split('=')
                         for each in infile ] ])
    
def test2():  # works if code sent to fix() to get first char
    print("\n>>>>>> test2: works; expected\n")
    vectors.update(
        [ [ func.strip(), functions[fix(code.strip())] ]
          for [func,code] in [ each.split('=')
                         for each in infile ] ])

def test3():  # fails on index:  code.strip()[0]
    print("\n>>>>>> test3: IndexError unexpected\n")
    vectors.update(
        [ [ func.strip(), functions[code.strip()[0]] ]
          for [func,code] in [ each.split('=')
                         for each in infile ] ])

# "2" is handled elsewhere.
    
x = sys.argv[1]
eval(f'test{x}()')
print(vectors)