Use of 1 and 0 because python3 doesn't accept true and false?

Question

I wrote some code for a python file scanner, but the only problem is my custom error codes won't run! I have to use 1 and 0 for the true and false because python3 doesn't accept true and false! Here's the code.

#File Scanner 1.2
scanTXTlog = input("Please type what you are looking for")
file = input("Please enter the .txt name")
#Gives new error messages
if UnicodeDecodeError == 1:
    print("Unicode error.....error resolved")
if FileNotFoundError == 1:
    print(file, 'could not be found. Please make sure you spelled it correctly and please do not add the .txt extension.')
#Begins searching
txtFile = open(file + ".txt", "r")
lineList = []
i = 0
for line in txtFile:
        lineList.append(line.rstrip("\n"))
        if scanTXTlog in lineList[i]:
            print(lineList[i -2 ])
        i += 1

****UPDATE BECAUSE I'M NEW TO STACK AND HAVE NO IDEA HOW TO REPLY****

I tried some new stuff and it works...but only on certain files. It can scan lots of them, but sometimes it just hits one and gives the IO error after the program is done. Here's the new code

def fileRead(encoding= 'utf-8'):
 scanTXTlog = input("Please type what you are looking for")
 file = input("Please enter the file name. Capitalization does not matter. Please add extension such as .py or.txt etc, etc")
#Begins searching
 txtFile = open(file, "r", encoding = 'utf-8')
 lineList = []
 i = 0
 for line in txtFile:
         lineList.append(line.rstrip("\n"))
         if scanTXTlog in lineList[i]:
             print(lineList[i])
         i += 1

 class UnicodeDecodeErrorHandler(encoding = 'utf-8'):
    def UnicodeDecodeErrorDefault(issubclass):
        print('Done')

Of course python3 accepts `True` and `False`! Notice the capitals. — Leistungsabfall, Oct 05 '14 at 16:51
What resource are you learning Python from? That is nowhere near actual Python exception handling. — jonrsharpe, Oct 05 '14 at 16:59

score 3 · Answer 1 · answered Oct 05 '14 at 16:56

3

..... What?

try:
  PossiblyRaiseAnException()
except SomeException:
  HandleException()
except SomeOtherException as e:
  HandleOtherException(e)

answered Oct 05 '14 at 16:56

Ignacio Vazquez-Abrams

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Sorry guys, I'm kinda new to python and stack – Daniel Tagbo Oct 07 '14 at 04:53

Leistungsabfall · Answer 2 · 2014-10-05T17:16:38.057

3

At first, Python 3 does support True and False!

To deal with Errors you have to build everything that could raise an error into try-except-clauses:

try:
    txtFile = open(file + ".txt", "r")
except OSError:
    print(file, 'could not be found. Please make sure you spelled it correctly and please do not add the .txt extension.')

Visit the docs for more information about Errors and Exceptions.

edited Oct 05 '14 at 17:16

answered Oct 05 '14 at 16:58

Leistungsabfall

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1

*"note that `open()` can only raise an `IOError`"* - not true! For example, `open(1)` will result in a `TypeError` (as will that concatenation, if `file` happens to not be a string - use `str.format` instead). – jonrsharpe Oct 05 '14 at 17:14

Use of 1 and 0 because python3 doesn't accept true and false?

2 Answers2