Como imprimir erros em tentativa, exceto python
try:
# some code
except Exception as e:
print("ERROR : "+str(e))
Jenova
try:
# some code
except Exception as e:
print("ERROR : "+str(e))import traceback
dict = {'a':3,'b':5,'c':8}
try:
print(dict[q])
except:
traceback.print_exc()
# This will trace you back to the line where everything went wrong.
# So in this case you will get back line 5
import sys
try:
f = open('myfile.txt')
s = f.readline()
i = int(s.strip())
except OSError as err:
print("OS error: {0}".format(err))
except ValueError:
print("Could not convert data to an integer.")
except:
print("Unexpected error:", sys.exc_info()[0])
raise#Syntax:
try:
statement
except Exception as varname:
statement
"""
Some specific exceptions (Lengthy but time-saving )-
ArithmeticError - Raised when an error occurs in numeric calculations
AssertionError - Raised when an assert statement fails
AttributeError - Raised when attribute reference or assignment fails
Exception - Base class for all exceptions
EOFError - Raised when the input() method hits an "end of file" condition (EOF)
FloatingPointError - Raised when a floating point calculation fails
GeneratorExit - Raised when a generator is closed (with the close() method)
ImportError - Raised when an imported module does not exist
IndentationError - Raised when indendation is not correct
IndexError - Raised when an index of a sequence does not exist
KeyError - Raised when a key does not exist in a dictionary
KeyboardInterrupt - Raised when the user presses Ctrl+c, Ctrl+z or Delete
LookupError - Raised when errors raised cant be found
MemoryError - Raised when a program runs out of memory
NameError - Raised when a variable does not exist
NotImplementedError - Raised when an abstract method requires an inherited class to override the method
OSError - Raised when a system related operation causes an error
OverflowError - Raised when the result of a numeric calculation is too large
ReferenceError - Raised when a weak reference object does not exist
RuntimeError - Raised when an error occurs that do not belong to any specific expections
StopIteration - Raised when the next() method of an iterator has no further values
SyntaxError - Raised when a syntax error occurs
TabError - Raised when indentation consists of tabs or spaces
SystemError - Raised when a system error occurs
SystemExit - Raised when the sys.exit() function is called
TypeError - Raised when two different types are combined
UnboundLocalError - Raised when a local variable is referenced before assignment
UnicodeError - Raised when a unicode problem occurs
UnicodeEncodeError - Raised when a unicode encoding problem occurs
UnicodeDecodeError - Raised when a unicode decoding problem occurs
UnicodeTranslateError - Raised when a unicode translation problem occurs
ValueError - Raised when there is a wrong value in a specified data type
ZeroDivisionError - Raised when the second operator in a division is zero
"""'''
In python, you can use try, except and finally to catch errors to keep
running your code even when you run into an error.
try:
# insert code
except SpecificError:
# code that will run if the code in 'try' doesn't work
finally:
# always runs this code, error or not
'''
try:
myVar = 10 / 0 # runs into an error
except ZeroDivisionError as error:
print(error) # prints error to user
finally:
print('Finished try, except, finally') # always prints
# Try and Except in python are for taking care of errors
# which may occur at runtime.
# For example:
# If flask is not installed, you will get an ImportError saying flask
# is not installed.
# The try keyword is to try running that block of code which may cause an error.
try:
from flask import Flask
except ImportError:
print('Flask is not installed! Use pip install flask to install it.')