import os
#os.chdir("/media/guerzhoy/Windows/cs_for_docs/workshop_extra")


def get_year_col_ind(line, year)
    tokens = line.split()
    col_ind = tokens.find(year)


def get_male_systolic_lower_pairs(filename, year):
    '''For year = 2009,
                 return [["Afghanistan", 115.5],
                         ["Albania", 125.7],
                         ...
                         ["Zimbabwe", 122.1]'''

    f = open(filename, encoding = "latin1")
    f.readline()
    
    col_ind =  get_year_col_number(line, year)
    
    all_data_pairs = []
    
    i = 0
    for line in f:
        tokens = line.split(",")
        if tokens[1] == "Male":
            data_str = tokens[col_ind]
            all_data_pairs[i] = [tokens[0], data_str[:4]]
            
    return all_data_pairs