argparse no longer prints to console

bot.py

@@ -173,7 +173,7 @@ class Fulvia(irc.IRCClient):
 			self._hooks.remove(func)
 
 		if func.rate or func.channel_rate or func.global_rate:
-			self._times.pop(func)
+			self._times.pop(func.__name__)
 
 		if hasattr(func, 'url_callback'):
 			for url in func.url_callback:

modules/ascii.py

@@ -3,7 +3,6 @@
 ASCII
 """
 from io import BytesIO
-import argparse
 
 import requests
 from PIL import Image, ImageFont, ImageDraw
@@ -11,6 +10,7 @@ from PIL import Image, ImageFont, ImageDraw
 import numpy as np
 import numpngw
 
+import tools
 import module
 
 ASCII_CHARS = "$@%#*+=-:. "
@@ -235,7 +235,7 @@ def ascii(bot, trigger):
 	"""
 	if len(trigger.args) < 2:
 		return bot.msg()
-	parser = argparse.ArgumentParser(add_help=False)
+	parser = tools.FulviaArgparse()
 	parser.add_argument("imagePath")
 	parser.add_argument("-r", "--reverse", action="store_true", help="Reverse.")
 	parser.add_argument("-c", "--color", action="store_true")
@@ -243,10 +243,10 @@ def ascii(bot, trigger):
 	parser.add_argument("-B", "--brail2", action="store_true")
 	parser.add_argument("-a", "--animated", action="store_true")
 	parser.add_argument("-h", "--help", action="store_true")
+	try:
 		args = parser.parse_args(trigger.args[1:])
-
+	except Exception as e:
-	if args.help:
+		return bot.reply(type(e).__name__ + ": " + str(e))
-		return bot.msg(parser.print_help())	
 
 	if args.color:
 		args.color = "irc"

modules/resistor.py

@@ -3,8 +3,8 @@
 Resistor color band codes.
 """
 import re
-import argparse
 
+import tools
 from module import commands, example
 
 suffix = {"k": 1000, "m": 10000000}
@@ -62,11 +62,14 @@ def resist(bot, trigger):
 	"""
 	if len(trigger.args) < 2:
 		return bot.msg("Please specify a value")
-	parser = argparse.ArgumentParser()
+	parser = tools.FulviaArgparse()
 	parser.add_argument("value", nargs="+")
 	parser.add_argument("-r", "--reverse", action="store_true")
 	parser.add_argument("-n", "--num_bands", type=int, choices=[3,4,5,6], default=4)
+	try:
 		args = parser.parse_args(trigger.args[1:])
+	except Exception as e:
+		return bot.reply(type(e).__name__ + ": " + str(e))
 
 	if args.reverse: # bands-to-value
 		bot.msg(bands_to_value(" ".join(args.value)))

modules/seen.py

@@ -4,13 +4,13 @@ When was this user last seen.
 """
 import os
 import time
-import argparse
 import threading
 from datetime import datetime
 from sqlite3 import OperationalError
 
 from requests.structures import CaseInsensitiveDict
 
+import tools
 import config
 from tools.time import relativeTime
 from module import commands, example, hook, require_chanmsg, rate
@@ -68,13 +68,16 @@ def seen(bot, trigger):
 	if len(trigger.args) < 2:
 		return bot.reply("Seen who?")
 
-	parser = argparse.ArgumentParser()
+	parser = tools.FulviaArgparse()
 	parser.add_argument("nick")
 	parser.add_argument("-l", "--last", action="store_true", default=True)
 	parser.add_argument("-f", "--first", action="store_true")
 	parser.add_argument("-m", "--message", action="store_true")
 	parser.add_argument("-c", "--context", action="store_true")
+	try:
 		args = parser.parse_args(trigger.args[1:])
+	except Exception as e:
+		return bot.reply(type(e).__name__ + ": " + str(e))
 
 	if args.nick == bot.nick:
 		return bot.reply("I'm right here!")

modules/slur.py

@@ -5,8 +5,8 @@ All data comes from http://www.rsdb.org/.
 """
 import random
 import sqlite3
-import argparse
 
+import tools
 from module import commands
 
 
@@ -33,11 +33,14 @@ def slur(bot, trigger):
 	-s, --slur  -  specifies a particular slur to pick.
 	-l, --list  -  prints a list of available races.
 	"""
-	parser = argparse.ArgumentParser()
+	parser = tools.FulviaArgparse()
 	parser.add_argument("-r", "--race", type=str, nargs='+')
 	parser.add_argument("-s", "--slur", type=str)
 	parser.add_argument("-l", "--list", action="store_true")
+	try:
 		args = parser.parse_args(trigger.args[1:])
+	except Exception as e:
+		return bot.reply(type(e).__name__ + ": " + str(e))
 
 	if args.list:
 		races = bot.db.execute("SELECT DISTINCT race FROM slur").fetchall()

modules/translate.py

@@ -3,10 +3,10 @@
 Google translate that shit.
 """
 import random
-import argparse
 
 import requests
 
+import tools
 from module import commands, example
 
 
@@ -45,11 +45,14 @@ def tr2(bot, trigger):
 	if len(trigger.args) < 2:
 		return bot.reply("Translate what?")
 
-	parser = argparse.ArgumentParser()
+	parser = tools.FulviaArgparse()
 	parser.add_argument("text", nargs=argparse.REMAINDER)
 	parser.add_argument("-i", "--inlang", default="auto")
 	parser.add_argument("-o", "--outlang", default="en")
+	try:
 		args = parser.parse_args(trigger.args[1:])
+	except Exception as e:
+		return bot.reply(type(e).__name__ + ": " + str(e))
 	args.text = " ".join(args.text)
 
 	tr_text, in_lang = translate(args.text, in_lang=args.inlang,

tools/__init__.py

@@ -3,6 +3,7 @@
 Some helper functions and other tools.
 """
 import re
+import argparse
 import threading
 from collections import defaultdict
 
@@ -199,3 +200,16 @@ def getOpSym(level):
 		return "+"
 	else:
 		return " "
+
+
+class FulviaArgparse(argparse.ArgumentParser):
+	"""
+	A custom ArgParser class that raises errors as exceptions rather than
+	printing them to stderr.
+	"""
+	def __init__(self, *args, **kwargs):
+		kwargs['add_help'] = False
+		super().__init__(*args, **kwargs)
+
+	def error(self, message):
+		raise argparse.ArgumentError(None, message)