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import cStringIO
import sys

class IOCapture(object):
    def __init__(self, stdout = True, stderr = True):
        self.captured_stdout = None
        self.captured_stderr = None
        if stdout:
            self.captured_stdout = cStringIO.StringIO()
        if stderr:

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import string
import itertools
class Grammar:
    def __init__(self, g, s):
        self.grammar = g
        self.start = s

    def remove_empty_rule_keys(self):
        while True:
            keys_to_delete = []

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import random
# 5 20 26 33 35 37 62 74 95 98
#random.seed(98)

class NT:
    def __init__(self):
        self.children = []
        self.depth = 0

    def __str__(self):

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# ---
# published: true
# title: Importing Python Modules
# layout: post
# comments: true
# tags: python
# categories: post
# ---

# In the [previous post](/post/2018/09/06/peg-parsing/) I discussed how to

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import functools
import inspect
 
def fix_params(func):
    @functools.wraps(func)
    def wrapper(*args, **kwargs):
        original_defaults = func.__defaults__
        new_defaults = []
        for val in func.__defaults__:
            if val == []:

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grammar = {
    '<start>': [['<expr>']],
    '<expr>': [ ['<term>', '+', '<expr>'], ['<term>', '-', '<expr>'], ['<term>']],
    '<term>': [ ['<fact>', '*', '<term>'], ['<fact>', '/', '<term>'], ['<fact>']],
    '<fact>': [ ['<digits>'], ['(','<expr>',')']],
    '<digits>': [ ['<digit>','<digits>'], ['<digit>']],
    '<digit>': [["%s" % str(i)] for i in range(10)],
}

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2
>>> 
| vim a.py

class X:
    def __init__(self, a,b,c):
        self.a, self.b, self.c = a,b,c

    def get_a(self):
        return self.a

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import random
import string
import itertools as I

grammar = {
    '<start>': [['<expr>']],
    '<expr>': [ ['<term>', '+', '<expr>'], ['<term>', '-', '<expr>'], ['<term>']],
    '<term>': [ ['<fact>', '*', '<term>'], ['<fact>', '/', '<term>'], ['<fact>']],
    '<fact>': [ ['<digits>'], ['(','<expr>',')']],
    '<digits>': [ ['<digit>','<digits>'], ['<digit>']],

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import time

class Chains:
    def __or__(self, trans):
        return trans.source(self)

class Source(Chains):
    def __init__(self, i):
        self.i = i

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###########################################################
# How to NEVER use lambdas. An inneficient and yet educa- #
# tonal [sic] guide to the proper misuse of the lambda    #
# construct in Python 3.x.  [DO NOT USE ANY OF THIS EVER] #
#          original by (and apologies to): e000 (13/6/11) #
#           now in Python 3 courtesy of: khuxkm (17/9/20) #
###########################################################

## Part 1. Basic LAMBDA Introduction ##
# If you're reading this, you've probably already read e000's