#!/usr/bin/env python

# import required modules
#
import os
import sys

# main: this is the main function of this Python
#
def main(argv):

    # first method
    #
    #lines = []
    #with open(sys.argv[1]) as f:
    #    for line in f:
    #        foo = line.rstrip('\n')
    #        if foo[0] != '#':
    #            lines.append(foo)
    #f.close()
    #print(">>>", lines)

    # iterate over lines and break intp parts
    #
    #for line in lines:
        #print("*> splitting: %s" % line)
        #parts = line.split('.')
        #print("...")
        #print(parts)
        #print("...")
        #parts = line.split('=')
        #print("***", parts[0], " = ", parts[1])

    # second method
    #
    #for line in open(sys.argv[1],'r').readlines():
    #    print("2nd method: ", line)

    # third method
    #
    #lines = [line.rstrip('\n') for line in open(sys.argv[1])]
    #print("3rd method: ", lines)

    #---
    # let's put all this together and write code that opens a file,
    # detects if the first nonwhitespace character is a '#',
    # and if not, splits the line and gets the name and value
    #---

    # open the file with error checking
    #
    try:
        f = open(sys.argv[1])
    except:
        print("***> error opening file... exiting...")
        exit(-1)
    with f:

        # read the file into memory
        #
        lines = [line.rstrip('\n') for line in f]

    # close the file
    #
    f.close()

    # loop over the data and only process the lines that don't
    # begin with a comment character
    #
    for line in lines:

        # remove spaces and newline chars
        #
        line = line.replace(' ', '').replace('\n', '').replace('\t', '')

        # check if the line starts with comments: if it does, skip it, else
        # process it
        #
        if line.startswith('#') or len(line) == 0:
            pass
        else:

            # split the line by an inline comment character
            #
            parts = line.split('#')

            # split the first part of the line into name/value pairs
            #
            values = parts[0].split('=')

            # display the result
            #
            print('**> name = ', values[0], '***> value = ', values[1])

# begin gracefully
#
if __name__ == "__main__":
    main(sys.argv)

#
# end of file