AttributeError: 'module' object has no attribute 'Parser'

Question

This is my final.py file.

#!/usr/bin/python
import sys
import os
sys.path.insert(0, './src/')
import lexRule
import parser
import ply.lex as lex
import ply.yacc as yacc
import node_file
import genAssembly as ga
import getopt
import pydot

def main(argv):
    to_parse = ''
    try:
        opts, args = getopt.getopt(argv,"o:f:h",["opt=","file=","help"])
    except getopt.GetoptError:
        print 'Usage : ./bin/final.py [options][-f/-h/-o] [string]'
        sys.exit(2)
    parse = parser.Parser()
    optjump = 0
    for opt, arg in opts:
        if opt in ("-o", "--opt"):
            if arg == "1":
                optjump = 1
        elif opt in ("-f", "--file"):
            tree = parse.parse_file(file(arg))
            t = parser.tac.code

            q = []
            if optjump == 1:
                for x in range(0,len(t)-1):
                    if t[x][0] == "goto" and t[x+1][3] == t[x][3]:
                        q.append(x)
                for qw in reversed(q):
                    del t[qw]

                parser.tac.code = t

            old_target = sys.stdout
            ga.generate()

            sys.stdout = open('output.s', 'w')
            ga.generate()

            sys.stdout = old_target


            print("Run ./a.out for execution")
            # os.system("nasm -f elf32 inout.s")
            # os.system("nasm -f elf32 fileio.s")
            os.system("nasm -f elf32 output.s")
            # os.system("nasm -f elf32 val1.s")
            # os.system("nasm -f elf32 next1.s")
            # os.system("nasm -f elf32 append2.s")
            os.system("gcc -m32 output.o ./bin/inout.o ./bin/fileio.o ./bin/val1.o ./bin/next1.o ./bin/append2.o")

        elif opt in ("-h", "--help"):
            _file = open("./README.txt")
            content = _file.read()
            print(content)
        else:
            print 'Usage : ./bin/final.py [options][-f/-h/-o] [string]'
            sys.exit(2)
    if not opts:
        print 'Usage : ./bin/final.py [options][-f/-h/-o] [string]'
        sys.exit(2)

if __name__ == "__main__":
    main(sys.argv[1:])

when i ran it on cmd this is the error i got.error I am using python2 and running these commands: python bin/final.py -f test/ackermann.java python bin/final.py -o 1 -f test/ackermann.java the project i am trying to run is :https://github.com/abhigarg-iitk/java_compiler

Answer 1

Since you are using your own parser module (named the same as the standard library) located in another location than the standard library packages you need to import it using the from ... import ... syntax and an __init.py__ file in your parser package directory.

For further reading you can have a look at the python documentation at https://docs.python.org/3/reference/import.html