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How to use error_exit method in avocado

Best Python code snippet using avocado_python

error.py

Source:error.py

1from error_exit import error_exit2from parenthesis import parse_parenthesis3def check_parenthesis(parents):4	if parents.count("(") != parents.count(")"):5		error_exit("Bad Syntax, parenthesis unbalanced")6	_ = parse_parenthesis(parents)7	found_opening = False8	for letter in parents:9		if found_opening:10			if not (letter.isalpha() or letter == "(" or letter == "!"):11				error_exit("Bad Syntax, parenthesis with non-alphabet symbol")12		if letter == ")":13			if not (last.isalpha() or last == ")"):14				error_exit("Bad Syntax, parenthesis with non-alphabet symbol")15		found_opening = False16		if letter == "(":17			found_opening = True18		last = letter19def check_parents(parents):20	parents = parents.replace('(', '').replace(')', '').split("+")21	for parent in parents:22		if not parent:23			error_exit("Bad Syntax, + missing symbol")24		if len(parent) == 1: ## AND25			if not parent.isalpha():26				error_exit("Bad Syntax, non-alphabet symbol")27		elif len(parent) == 2: ## NOT28			if parent[0] != "!" or not parent[1].isalpha():29				error_exit("Bad Syntax, combined conditions")30		else: ## OR / XOR31			parents_or = parent.split("|")32			for parent in parents_or:33				if not parent:34					error_exit("Bad Syntax, | missing symbol")35				if len(parent) == 1: ## OR36					if not parent.isalpha():37						error_exit("Bad Syntax, non-alphabet symbol with |")38				elif len(parent) == 2: ## OR NOT39					if parent[0] != "!" or not parent[1].isalpha():40						error_exit("Bad Syntax, 2 combined conditions")41				else: ## XOR42					parents_xor = parent.split("^")43					for parent in parents_xor:44						if not parent:45							error_exit("Bad Syntax, ^ missing symbol")46						if len(parent) == 1: ## XOR47							if not parent.isalpha():48								error_exit("Bad Syntax, non-alphabet symbol with ^")49						elif len(parent) == 2: ## XOR NOT50							if parent[0] != "!" or not parent[1].isalpha():51								error_exit("Bad Syntax, many combined conditions")52						else:53							for content in parents_xor:54								i = 055								for letter in content:56									i += 157									last = letter58								j = 059								for letter in content:60									j += 161									if i == j:62										break63									if letter != "!":64										error_exit("Bad Syntax, too many combined conditions")65								if not last.isalpha():66									error_exit("Bad Syntax, too many combined conditions")67def check_children(children):68	if "(" in children or ")" in children:69		error_exit("Bad Syntax, parenthesis in conclusion")70	children = children.split("+")71	for child in children:72		if not child:73			error_exit("Bad Syntax, + missing symbol in conclusion")74		if len(child) == 1: ## AND75			if not child.isalpha():76				error_exit("Bad Syntax, non-alphabet symbol")77		elif len(child) == 2: ## NOT78			if child[0] != "!" or not child[1].isalpha():79				error_exit("Bad Syntax, combined conditions")80		else: ## OR / XOR81			children_or = child.split("|")82			for child_or in children_or:83				if not child_or:84					error_exit("Bad Syntax, | missing symbol")85				if len(child_or) == 1: ## OR86					if not child_or.isalpha():87						error_exit("Bad Syntax, non-alphabet symbol with |")88				elif len(child_or) == 2: ## OR NOT89					if child_or[0] != "!" or not child_or[1].isalpha():90						error_exit("Bad Syntax, 2 combined conditions")91				else: ## XOR92					children_xor = child_or.split("^")93					for child_xor in children_xor:94						if not child_xor:95							error_exit("Bad Syntax, ^ missing symbol")96						if len(child_xor) == 1: ## XOR97							if not child_xor.isalpha():98								error_exit("Bad Syntax, non-alphabet symbol with ^")99						elif len(child_xor) == 2: ## XOR NOT100							if child_xor[0] != "!" or not child_xor[1].isalpha():101								error_exit("Bad Syntax, many combined conditions")102						else:103							error_exit("Bad Syntax, too many combined conditions")104def check_syntax(g):105	for rule in g.rules:106		check_parenthesis(rule.parents)107		check_parents(rule.parents)108		check_children(rule.children)109def check_loop(g):110	for rule in g.rules:111		rules_tree = []112		for child in rule.children:113			for letter in child:114				if letter.isalpha():115					deduced = letter116					for rule_implied in g.rules:117						for parent in rule_implied.parents:118							for letter in parent:119								if letter == deduced:120									rules_tree.append(rule_implied)121					for rule_implied in rules_tree:122						if len(rules_tree) > 420000: ## complexity limit123							error_exit("Bad Logic, infinite loop")124						for child in rule_implied.children:125							for letter in child:126								if letter.isalpha():127									deduced = letter128									for rule_orig in g.rules:129										for parent in rule_orig.parents:130											for letter in parent:131												if letter == deduced:132													if rule_orig.parents == rule.parents and rule_orig.children == rule.children:133														error_exit("circular Logic, infinite loop")134													rules_tree.append(rule_orig)135													break136def check_contradiction(g):137	for fact in g.facts:138		rules_tree = []139		positive = []140		negative = []141		for child_rule in fact.child_rules:142			rules_tree.append(child_rule)143		for child_rule in rules_tree:144			negative_found = False145			for letter in child_rule.children:146				if letter == "!":147					negative_found = True148				if letter.isalpha():149					if negative_found == False:150						positive.append(letter)151					else:152						negative.append(letter)153					negative_found = False		154			for rule_implied in g.rules:155				for parent in rule_implied.parents:156					for letter_implied in parent:157						if letter_implied == letter:158							rules_tree.append(rule_implied)159		for pos in positive:160			for neg in negative:161				if pos == neg:162					error_exit("Bad Logic, contradiction")163def check_error(g):164	check_syntax(g)165	check_loop(g)...

parse.py

Source:parse.py

...32	logic = args.logic33	return filepath, graph, color, timer, logic34def parse_initial_facts(line, g):35	if g.initial_facts:36		error_exit("Multiple lines of initial facts")37	initial_facts = line38	i = 039	for letter in initial_facts:40		fact_found = False41		if i > 0:42			if not letter.isalpha():43				error_exit("Non-alphabet character in initial facts")44			for fact in g.facts:45				if letter == fact.symbol:46					fact_found = True47					break48			if fact_found:49				g.add_initial_fact(letter)50			else:51				g.add_fact(letter)52				g.add_initial_fact(letter)53		i += 154		if i > 26:55			error_exit("Initial facts too long")56def parse_queries(line, g):57	if g.queries:58		error_exit("Multiple lines of queries")59	queries = line60	i = 061	for letter in queries:62		if i > 0:63			g.add_queries(letter)64		i += 165		if i > 26:66			error_exit("Queries too long")67def parse_rule(line, g):68	i = 069	for letter in line:70		i += 171		if i > 100000:72			error_exit("Rule too long")73		if letter.isalpha() == True:74			found = False75			for fact in g.facts:76				if letter == fact.symbol:77					found = True78			if not found:79				g.add_fact(letter)80	g.add_rule(line)81### parse_file converts Rules, Initial facts, & Queries into a graph of fact nodes linked with parent & child rules82def parse_file(filepath):83	if not os.path.isfile(filepath):84		error_exit("Invalid filepath")85	if not os.access(filepath, os.R_OK):86		error_exit("file has no read permissions")87	allowedSymbols = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '(', ')', '+', '!', '|', '^', '=', '>', '?'}88	g = graph()89	with open(filepath, 'r') as file:90		i = 091		initial_facts_found = False92		for line in file:93			i += 194			if i > 10000:95				error_exit("File too long")96			line = line.replace(" ", "").replace("\t", "").replace("\n", "").split("#")[0]97			if line != "":98				if not allowedSymbols.issuperset(line):99					error_exit("Invalid symbol in file")100				if line[0] == '=': ## Initial facts101					parse_initial_facts(line, g)102					initial_facts_found = True103				elif line[0] == '?': ## Queries104					if not initial_facts_found:105						error_exit("Queries given before initial facts")106					parse_queries(line, g)107				else: ## Rule108					if initial_facts_found:109						error_exit("Rule given after initial facts")110					if g.queries:111						error_exit("Rule given after queries")112					parse_rule(line, g)113		if initial_facts_found == False:114			error_exit("No initial facts")115		if not g.queries:116			error_exit("No queries")117	g.link_facts_rules()...

recipe-580767.py

Source:recipe-580767.py

...24    def __init__(self, tee_filename):25        try:26            self.tee_fil = open(tee_filename, "w")27        except IOError as ioe:28            error_exit("Caught IOError: {}".format(repr(ioe)))29        except Exception as e:30            error_exit("Caught Exception: {}".format(repr(e)))31    def write(self, s):32        sys.stdout.write(s)33        self.tee_fil.write(s)34    def writeln(self, s):35        self.write(s + '\n')36    def close(self):37        try:38            self.tee_fil.close()39        except IOError as ioe:40            error_exit("Caught IOError: {}".format(repr(ioe)))41        except Exception as e:42            error_exit("Caught Exception: {}".format(repr(e)))43def main():44    if len(sys.argv) != 2:45        error_exit("Usage: python {} teefile".format(sys.argv[0]))46    tee = Tee(sys.argv[1])47    tee.write("This is a test of the Tee Python class.\n")48    tee.writeln("It is inspired by the Unix tee command,")49    tee.write("which can send output to both a file and stdout.\n")50    i = 151    s = "apple"52    tee.writeln("This line has interpolated values like {} and '{}'.".format(i, s))53    tee.close()54if __name__ == '__main__':55    main()56'''57The error_exit function is as follows - put it into a separate file called 58error_exit.py in the same folder as the tee.py program, on put it on your PYTHONPATH:59# error_exit.py60# Author: Vasudev Ram61# Web site: https://vasudevram.github.io62# Blog: https://jugad2.blogspot.com63# Product store: https://gumroad.com/vasudevram64# Purpose: This module, error_exit.py, defines a function with 65# the same name, error_exit(), which takes a string message 66# as an argument. It prints the message to sys.stderr, or 67# to another file object open for writing (if given as the 68# second argument), and then exits the program.69# The function error_exit can be used when a fatal error condition occurs, 70# and you therefore want to print an error message and exit your program.71import sys72def error_exit(message, dest=sys.stderr):73    dest.write(message)74    sys.exit(1)75def main():76    error_exit("Testing error_exit.\n")77if __name__ == "__main__":78    main()...

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