How to get a useful exception message from decimal in python 3?How can I represent an 'Enum' in Python?How to round a number to n decimal places in JavaHow do you assert that a certain exception is thrown in JUnit 4 tests?How can I safely create a nested directory in Python?How to properly ignore exceptionsProper way to declare custom exceptions in modern Python?Manually raising (throwing) an exception in Pythonpython exception message capturingUnicodeDecodeError: 'charmap' codec can't decode byte X in position Y: character maps to <undefined>Python catching entry exception with decimal.InvalidOperation
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How to get a useful exception message from decimal in python 3?
How can I represent an 'Enum' in Python?How to round a number to n decimal places in JavaHow do you assert that a certain exception is thrown in JUnit 4 tests?How can I safely create a nested directory in Python?How to properly ignore exceptionsProper way to declare custom exceptions in modern Python?Manually raising (throwing) an exception in Pythonpython exception message capturingUnicodeDecodeError: 'charmap' codec can't decode byte X in position Y: character maps to <undefined>Python catching entry exception with decimal.InvalidOperation
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With Python 2, creating a Decimal with an invalid string produces a useful error message:
>>> import decimal
>>> decimal.Decimal('spam')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/decimal.py", line 547, in __new__
"Invalid literal for Decimal: %r" % value)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/decimal.py", line 3872, in _raise_error
raise error(explanation)
decimal.InvalidOperation: Invalid literal for Decimal: 'spam'
While Python 3 produces a not-so-helpful message:
>>> import decimal
>>> decimal.Decimal('spam')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
decimal.InvalidOperation: [<class 'decimal.ConversionSyntax'>]
Is there any way to get a useful message like "Invalid literal for Decimal: 'spam'" from the exception in Python 3?
I'm using Python 2.7.15 and Python 3.7.2, both on darwin.
Addenda:
It looks like Python 2 once had a not-very-helpful message for decimal.InvalidOperation: https://bugs.python.org/issue1770009
This situation looks analogous but most of it goes over my head: https://bugs.python.org/issue21227
python-3.x exception decimal invalidoperationexception
asked Mar 20 at 21:11
heckmanheckman
13
add a comment |
With Python 2, creating a Decimal with an invalid string produces a useful error message:
>>> import decimal
>>> decimal.Decimal('spam')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/decimal.py", line 547, in __new__
"Invalid literal for Decimal: %r" % value)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/decimal.py", line 3872, in _raise_error
raise error(explanation)
decimal.InvalidOperation: Invalid literal for Decimal: 'spam'
While Python 3 produces a not-so-helpful message:
>>> import decimal
>>> decimal.Decimal('spam')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
decimal.InvalidOperation: [<class 'decimal.ConversionSyntax'>]
Is there any way to get a useful message like "Invalid literal for Decimal: 'spam'" from the exception in Python 3?
I'm using Python 2.7.15 and Python 3.7.2, both on darwin.
Addenda:
It looks like Python 2 once had a not-very-helpful message for decimal.InvalidOperation: https://bugs.python.org/issue1770009
This situation looks analogous but most of it goes over my head: https://bugs.python.org/issue21227
python-3.x exception decimal invalidoperationexception
asked Mar 20 at 21:11
heckmanheckman
13
add a comment |
With Python 2, creating a Decimal with an invalid string produces a useful error message:
>>> import decimal
>>> decimal.Decimal('spam')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/decimal.py", line 547, in __new__
"Invalid literal for Decimal: %r" % value)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/decimal.py", line 3872, in _raise_error
raise error(explanation)
decimal.InvalidOperation: Invalid literal for Decimal: 'spam'
While Python 3 produces a not-so-helpful message:
>>> import decimal
>>> decimal.Decimal('spam')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
decimal.InvalidOperation: [<class 'decimal.ConversionSyntax'>]
Is there any way to get a useful message like "Invalid literal for Decimal: 'spam'" from the exception in Python 3?
I'm using Python 2.7.15 and Python 3.7.2, both on darwin.
Addenda:
It looks like Python 2 once had a not-very-helpful message for decimal.InvalidOperation: https://bugs.python.org/issue1770009
This situation looks analogous but most of it goes over my head: https://bugs.python.org/issue21227
python-3.x exception decimal invalidoperationexception
asked Mar 20 at 21:11
heckmanheckman
13
With Python 2, creating a Decimal with an invalid string produces a useful error message:
>>> import decimal
>>> decimal.Decimal('spam')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/decimal.py", line 547, in __new__
"Invalid literal for Decimal: %r" % value)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/decimal.py", line 3872, in _raise_error
raise error(explanation)
decimal.InvalidOperation: Invalid literal for Decimal: 'spam'
While Python 3 produces a not-so-helpful message:
>>> import decimal
>>> decimal.Decimal('spam')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
decimal.InvalidOperation: [<class 'decimal.ConversionSyntax'>]
Is there any way to get a useful message like "Invalid literal for Decimal: 'spam'" from the exception in Python 3?
I'm using Python 2.7.15 and Python 3.7.2, both on darwin.
Addenda:
It looks like Python 2 once had a not-very-helpful message for decimal.InvalidOperation: https://bugs.python.org/issue1770009
This situation looks analogous but most of it goes over my head: https://bugs.python.org/issue21227
python-3.x exception decimal invalidoperationexception
python-3.x exception decimal invalidoperationexception
asked Mar 20 at 21:11
heckmanheckman
13
asked Mar 20 at 21:11
heckmanheckman
13
edited Mar 22 at 19:14
heckman
asked Mar 20 at 21:11
heckmanheckman
13
asked Mar 20 at 21:11
heckmanheckman
13
asked Mar 20 at 21:11
heckmanheckman
13
13
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
You could monkey-patch the decimal module.
import decimal
def safe_decimal(something):
try:
funct_holder(something)
except Exception as e:
new_errror = Exception("Hey silly that's not a decimal, what should I do with this? ".format(something))
raise new_errror from None
funct_holder = decimal.Decimal
decimal.Decimal = safe_decimal
Then you could use the monkey patched version as so
>>> decimal.Decimal('hello')
Traceback (most recent call last):
File "<input>", line 12, in <module>
File "<input>", line 6, in safe_decimal
Exception: Hey silly that's not a decimal, what should I do with this? hello
answered Mar 20 at 21:34
JBirdVegasJBirdVegas
6,26312643
I've already wrapped the decimal creation in a function that does something very similar to your function (but usingraise ValueError(something))... I was hoping I could extractsomethingdirectly from[<class 'decimal.ConversionSyntax'>]to avoid the work-around.
– heckman
Mar 21 at 1:10
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You could monkey-patch the decimal module.
import decimal
def safe_decimal(something):
try:
funct_holder(something)
except Exception as e:
new_errror = Exception("Hey silly that's not a decimal, what should I do with this? ".format(something))
raise new_errror from None
funct_holder = decimal.Decimal
decimal.Decimal = safe_decimal
Then you could use the monkey patched version as so
>>> decimal.Decimal('hello')
Traceback (most recent call last):
File "<input>", line 12, in <module>
File "<input>", line 6, in safe_decimal
Exception: Hey silly that's not a decimal, what should I do with this? hello
answered Mar 20 at 21:34
JBirdVegasJBirdVegas
6,26312643
I've already wrapped the decimal creation in a function that does something very similar to your function (but usingraise ValueError(something))... I was hoping I could extractsomethingdirectly from[<class 'decimal.ConversionSyntax'>]to avoid the work-around.
– heckman
Mar 21 at 1:10
add a comment |
You could monkey-patch the decimal module.
import decimal
def safe_decimal(something):
try:
funct_holder(something)
except Exception as e:
new_errror = Exception("Hey silly that's not a decimal, what should I do with this? ".format(something))
raise new_errror from None
funct_holder = decimal.Decimal
decimal.Decimal = safe_decimal
Then you could use the monkey patched version as so
>>> decimal.Decimal('hello')
Traceback (most recent call last):
File "<input>", line 12, in <module>
File "<input>", line 6, in safe_decimal
Exception: Hey silly that's not a decimal, what should I do with this? hello
answered Mar 20 at 21:34
JBirdVegasJBirdVegas
6,26312643
I've already wrapped the decimal creation in a function that does something very similar to your function (but usingraise ValueError(something))... I was hoping I could extractsomethingdirectly from[<class 'decimal.ConversionSyntax'>]to avoid the work-around.
– heckman
Mar 21 at 1:10
add a comment |
You could monkey-patch the decimal module.
import decimal
def safe_decimal(something):
try:
funct_holder(something)
except Exception as e:
new_errror = Exception("Hey silly that's not a decimal, what should I do with this? ".format(something))
raise new_errror from None
funct_holder = decimal.Decimal
decimal.Decimal = safe_decimal
Then you could use the monkey patched version as so
>>> decimal.Decimal('hello')
Traceback (most recent call last):
File "<input>", line 12, in <module>
File "<input>", line 6, in safe_decimal
Exception: Hey silly that's not a decimal, what should I do with this? hello
answered Mar 20 at 21:34
JBirdVegasJBirdVegas
6,26312643
You could monkey-patch the decimal module.
import decimal
def safe_decimal(something):
try:
funct_holder(something)
except Exception as e:
new_errror = Exception("Hey silly that's not a decimal, what should I do with this? ".format(something))
raise new_errror from None
funct_holder = decimal.Decimal
decimal.Decimal = safe_decimal
Then you could use the monkey patched version as so
>>> decimal.Decimal('hello')
Traceback (most recent call last):
File "<input>", line 12, in <module>
File "<input>", line 6, in safe_decimal
Exception: Hey silly that's not a decimal, what should I do with this? hello
answered Mar 20 at 21:34
JBirdVegasJBirdVegas
6,26312643
answered Mar 20 at 21:34
JBirdVegasJBirdVegas
6,26312643
answered Mar 20 at 21:34
JBirdVegasJBirdVegas
6,26312643
answered Mar 20 at 21:34
JBirdVegasJBirdVegas
6,26312643
6,26312643
I've already wrapped the decimal creation in a function that does something very similar to your function (but usingraise ValueError(something))... I was hoping I could extractsomethingdirectly from[<class 'decimal.ConversionSyntax'>]to avoid the work-around.
– heckman
Mar 21 at 1:10
add a comment |
I've already wrapped the decimal creation in a function that does something very similar to your function (but usingraise ValueError(something))... I was hoping I could extractsomethingdirectly from[<class 'decimal.ConversionSyntax'>]to avoid the work-around.
– heckman
Mar 21 at 1:10
I've already wrapped the decimal creation in a function that does something very similar to your function (but using
raise ValueError(something))... I was hoping I could extract something directly from [<class 'decimal.ConversionSyntax'>] to avoid the work-around.– heckman
Mar 21 at 1:10
I've already wrapped the decimal creation in a function that does something very similar to your function (but using
raise ValueError(something))... I was hoping I could extract something directly from [<class 'decimal.ConversionSyntax'>] to avoid the work-around.– heckman
Mar 21 at 1:10
add a comment |
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