Python Print Error Line Number
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Python Exception Traceback To String
Stack Overflow the company Business Learn more about hiring developers or posting ads with python print exception message us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is python get exception type a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Python exception handling - line number up vote 19 down vote favorite 12 I'm
Python Exception Object
using python to evaluate some measured data. Because of many possible results it is difficult to handle or possible combinations. Sometimes an error happens during the evaluation. It is usually an index error because I get out of range from measured data. It is very difficult to find out on which place in code the problem happened. It would help a lot if I knew on which line the error was
Python Exception To String
raised. If I use following code: try: result = evaluateData(data) except Exception, err: print ("Error: %s.\n" % str(err)) Unfortunately this only tells me that there is and index error. I would like to know more details about the exception (line in code, variable etc.) to find out what happened. Is it possible? Thank you. python exception indexing share|improve this question asked Jan 25 '13 at 9:47 JeCh 101116 See stackoverflow.com/questions/3702675/…! –Charles Beattie Jan 25 '13 at 9:57 docs.python.org/2/library/traceback.html#traceback-examples –osa Sep 9 '14 at 23:44 @JeCh The answers look good. Please accept one. To accept it click the empty checkmark next to the answer. –Michael Potter Aug 9 '15 at 23:53 add a comment| 2 Answers 2 active oldest votes up vote 30 down vote Solution, printing filename, linenumber, line itself and exception descrition: import linecache import sys def PrintException(): exc_type, exc_obj, tb = sys.exc_info() f = tb.tb_frame lineno = tb.tb_lineno filename = f.f_code.co_filename linecache.checkcache(filename) line = linecache.getline(filename, lineno, f.f_globals) print 'EXCEPTION IN ({}, LINE {} "{}"): {}'.format(filename, lineno, line.strip(), exc_obj) try: print 1/0 except: PrintException() Output: EXCEPTION IN (D:/Projects/delme3.py, LINE 15 "print 1/0"): integer division or modulo by zero share|improve this answer answered Nov 28 '13 at 10:50 Apogentus 1,6261120 add a co
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Python Logging Exception
more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x python exception class Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Capture http://stackoverflow.com/questions/14519177/python-exception-handling-line-number file and line number for an exception that wasn't raised up vote 0 down vote favorite Is it possible to collect the file and line number where an exception object was created if that object is never raised? Example: def compute_score_for_test(test): # Exceptions can be added to a test explicitly. if test_is_unscorable(test): test.add_error(UnscorableTestError('...')) ... # During certain operations, caught exceptions also get added to http://stackoverflow.com/questions/27194655/capture-file-and-line-number-for-an-exception-that-wasnt-raised a test. try: ... except Exception as e: test.add_error(e) ... much later ... for test in test_set: for error in test.errors: # Using print as a contrived example; we actually store these values in a database. print '[%s] %s (%s:%d)' % ( error.__class__.__name__, error.message, error.file_name, # <- ...somehow error.line_number, # ) Adding code to test.add_error() is an option if there is no other way. python exception share|improve this question edited Dec 3 '14 at 18:20 asked Nov 28 '14 at 19:05 user212218 add a comment| 4 Answers 4 active oldest votes up vote 0 down vote This SO answer shows how to get the current file and line number, e.g.: import sys def LINE( back = 0 ): return sys._getframe( back + 1 ).f_lineno def FILE( back = 0 ): def foo(): print "this is line number", LINE(), " of file ", FILE() and you can put that information into your error object. share|improve this answer answered Nov 28 '14 at 19:27 ErikR 39.9k53783 add a comment| up vote 0 down vote You can get the current line with the inspect module, like so: import inspect def lineno(): return ins
you have probably seen some. There are (at least) two distinguishable kinds of errors: syntax errors and exceptions. 8.1. Syntax Errors¶ Syntax https://docs.python.org/3.3/tutorial/errors.html errors, also known as parsing errors, are perhaps the most common kind of complaint you get while you are still learning Python: >>> while True print('Hello world') File "
Supporting Functions Working With Exceptions Working With the Stack print_stack() format_stack() extract_stack() Navigation Table of Contents Previous: sysconfig - Interpreter Compile-time Configuration Next: warnings - Non-fatal alerts This Page Show Source Examples The output from all the example programs from PyMOTW has been generated with Python 2.7.8, unless otherwise noted. Some of the features described here may not be available in earlier versions of Python. If you are looking for examples that work under Python 3, please refer to the PyMOTW-3 section of the site. Navigation index modules | next | previous | PyMOTW » Python Runtime Services » traceback - Extract, format, and print exceptions and stack traces.¶ Purpose:Extract, format, and print exceptions and stack traces. Available In:1.4 and later, with modifications over time The traceback module works with the call stack to produce error messages. A traceback is a stack trace from the point of an exception handler down the call chain to the point where the exception was raised. You can also work with the current call stack up from the point of a call (and without the context of an error), which is useful for finding out the paths being followed into a function. The functions in traceback fall into several common categories. There are functions for extracting raw tracebacks from the current runtime environment (either an exception handler for a traceback, or the regular stack). The extracted stack trace is a sequence of tuples containing the filename, line number, function name, and text of the source line. Once extracted, the stack trace can be formatted using functions like format_exception(), format_stack(), etc. The format functions return a list of strings with messages formatted to be printed. There are shorthand functions for printing the formatted values, as well. Although the functions in traceback mimic the behavior of the interactive interpreter by default, they also are useful for handling exceptions in situations where dumping the full stack trace to stderr is not desirable. For example, a web application may need to format the traceback so it looks good in HTML. An IDE may convert the elements of the stack trace into a clickable list that lets