Catch exception “missing 1 required positional argument” if I don't send two arguments?
-1
Is it possible to catch exception “missing 1 required positional argument” if I don't send two arguments? How to fix it if I can't change assert functions.
def sum (n,m):
return n+m
if __name__ == '__main__':
assert sum(16,15) == 31, "EXAMPLE"
assert sum([16,16]) == 32, "result - missing 1 required positional"
python
asked Nov 21 '18 at 23:53
Michał HałuchaMichał Hałucha
12
|
show 1 more comment
-1
Is it possible to catch exception “missing 1 required positional argument” if I don't send two arguments? How to fix it if I can't change assert functions.
def sum (n,m):
return n+m
if __name__ == '__main__':
assert sum(16,15) == 31, "EXAMPLE"
assert sum([16,16]) == 32, "result - missing 1 required positional"
python
asked Nov 21 '18 at 23:53
Michał HałuchaMichał Hałucha
12
What's your question?
– user2357112
Nov 21 '18 at 23:54
2
You can catch that with a try-except, just like with any other exception, but it's not the kind of thing you should be catching in most situations. Why do you want to do that? If you're trying to write a function with a flexible signature, you should be looking at optional arguments and*args/**kwargscatchall arguments.
– user2357112
Nov 22 '18 at 0:11
"How to fix it if I can't change assert functions" - the way you're usingassertmakes no sense.
– user2357112
Nov 22 '18 at 0:24
The second argument toassertis an assertion failure message, to be used if the first argument is false. It is not used if evaluating the first argument throws an exception, and it is not compared to the exception message in any way. It doesn't make sense to report an assertion failure with message "result - missing 1 required positional" ifsum([16,16]) == 32is false.
– user2357112
Nov 22 '18 at 0:27
Ok, thank You. This is example of my exercise. I think that in this exercise is mistake, because i can't edit assert function. I can only modify my def. If i get list and i have to use function with two arguments... it's no sens. Finally, exercise like this is on the very popular page about python. (This code is short version to simply clarify problem)
– Michał Hałucha
Nov 22 '18 at 1:18
|
show 1 more comment
-1
-1
-1
Is it possible to catch exception “missing 1 required positional argument” if I don't send two arguments? How to fix it if I can't change assert functions.
def sum (n,m):
return n+m
if __name__ == '__main__':
assert sum(16,15) == 31, "EXAMPLE"
assert sum([16,16]) == 32, "result - missing 1 required positional"
python
asked Nov 21 '18 at 23:53
Michał HałuchaMichał Hałucha
12
Is it possible to catch exception “missing 1 required positional argument” if I don't send two arguments? How to fix it if I can't change assert functions.
def sum (n,m):
return n+m
if __name__ == '__main__':
assert sum(16,15) == 31, "EXAMPLE"
assert sum([16,16]) == 32, "result - missing 1 required positional"
python
python
asked Nov 21 '18 at 23:53
Michał HałuchaMichał Hałucha
12
asked Nov 21 '18 at 23:53
Michał HałuchaMichał Hałucha
12
edited Nov 22 '18 at 0:16
Michał Hałucha
asked Nov 21 '18 at 23:53
Michał HałuchaMichał Hałucha
12
asked Nov 21 '18 at 23:53
Michał HałuchaMichał Hałucha
12
asked Nov 21 '18 at 23:53
Michał HałuchaMichał Hałucha
12
12
What's your question?
– user2357112
Nov 21 '18 at 23:54
2
You can catch that with a try-except, just like with any other exception, but it's not the kind of thing you should be catching in most situations. Why do you want to do that? If you're trying to write a function with a flexible signature, you should be looking at optional arguments and*args/**kwargscatchall arguments.
– user2357112
Nov 22 '18 at 0:11
"How to fix it if I can't change assert functions" - the way you're usingassertmakes no sense.
– user2357112
Nov 22 '18 at 0:24
The second argument toassertis an assertion failure message, to be used if the first argument is false. It is not used if evaluating the first argument throws an exception, and it is not compared to the exception message in any way. It doesn't make sense to report an assertion failure with message "result - missing 1 required positional" ifsum([16,16]) == 32is false.
– user2357112
Nov 22 '18 at 0:27
Ok, thank You. This is example of my exercise. I think that in this exercise is mistake, because i can't edit assert function. I can only modify my def. If i get list and i have to use function with two arguments... it's no sens. Finally, exercise like this is on the very popular page about python. (This code is short version to simply clarify problem)
– Michał Hałucha
Nov 22 '18 at 1:18
|
show 1 more comment
What's your question?
– user2357112
Nov 21 '18 at 23:54
2
You can catch that with a try-except, just like with any other exception, but it's not the kind of thing you should be catching in most situations. Why do you want to do that? If you're trying to write a function with a flexible signature, you should be looking at optional arguments and*args/**kwargscatchall arguments.
– user2357112
Nov 22 '18 at 0:11
"How to fix it if I can't change assert functions" - the way you're usingassertmakes no sense.
– user2357112
Nov 22 '18 at 0:24
The second argument toassertis an assertion failure message, to be used if the first argument is false. It is not used if evaluating the first argument throws an exception, and it is not compared to the exception message in any way. It doesn't make sense to report an assertion failure with message "result - missing 1 required positional" ifsum([16,16]) == 32is false.
– user2357112
Nov 22 '18 at 0:27
Ok, thank You. This is example of my exercise. I think that in this exercise is mistake, because i can't edit assert function. I can only modify my def. If i get list and i have to use function with two arguments... it's no sens. Finally, exercise like this is on the very popular page about python. (This code is short version to simply clarify problem)
– Michał Hałucha
Nov 22 '18 at 1:18
What's your question?
– user2357112
Nov 21 '18 at 23:54
What's your question?
– user2357112
Nov 21 '18 at 23:54
2
2
You can catch that with a try-except, just like with any other exception, but it's not the kind of thing you should be catching in most situations. Why do you want to do that? If you're trying to write a function with a flexible signature, you should be looking at optional arguments and
*args/**kwargs catchall arguments.– user2357112
Nov 22 '18 at 0:11
You can catch that with a try-except, just like with any other exception, but it's not the kind of thing you should be catching in most situations. Why do you want to do that? If you're trying to write a function with a flexible signature, you should be looking at optional arguments and
*args/**kwargs catchall arguments.– user2357112
Nov 22 '18 at 0:11
"How to fix it if I can't change assert functions" - the way you're using
assert makes no sense.– user2357112
Nov 22 '18 at 0:24
"How to fix it if I can't change assert functions" - the way you're using
assert makes no sense.– user2357112
Nov 22 '18 at 0:24
The second argument to
assert is an assertion failure message, to be used if the first argument is false. It is not used if evaluating the first argument throws an exception, and it is not compared to the exception message in any way. It doesn't make sense to report an assertion failure with message "result - missing 1 required positional" if sum([16,16]) == 32 is false.– user2357112
Nov 22 '18 at 0:27
The second argument to
assert is an assertion failure message, to be used if the first argument is false. It is not used if evaluating the first argument throws an exception, and it is not compared to the exception message in any way. It doesn't make sense to report an assertion failure with message "result - missing 1 required positional" if sum([16,16]) == 32 is false.– user2357112
Nov 22 '18 at 0:27
Ok, thank You. This is example of my exercise. I think that in this exercise is mistake, because i can't edit assert function. I can only modify my def. If i get list and i have to use function with two arguments... it's no sens. Finally, exercise like this is on the very popular page about python. (This code is short version to simply clarify problem)
– Michał Hałucha
Nov 22 '18 at 1:18
Ok, thank You. This is example of my exercise. I think that in this exercise is mistake, because i can't edit assert function. I can only modify my def. If i get list and i have to use function with two arguments... it's no sens. Finally, exercise like this is on the very popular page about python. (This code is short version to simply clarify problem)
– Michał Hałucha
Nov 22 '18 at 1:18
|
show 1 more comment
1 Answer
1
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oldest
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0
I found the solution. I just put second argument optional. In this situation I don't have to modify my main function.
def sum (n,m=0):
if m!=0:
return n + m
elif type(n)==list:
return n[0]+n[1]
if __name__=='__main__':
assert sum(16, 15) == 31, "EXAMPLE"
assert sum([16, 16]) == 32, "result - missing 1 required positional"
answered Nov 22 '18 at 11:21
Michał HałuchaMichał Hałucha
12
add a comment |
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0
I found the solution. I just put second argument optional. In this situation I don't have to modify my main function.
def sum (n,m=0):
if m!=0:
return n + m
elif type(n)==list:
return n[0]+n[1]
if __name__=='__main__':
assert sum(16, 15) == 31, "EXAMPLE"
assert sum([16, 16]) == 32, "result - missing 1 required positional"
answered Nov 22 '18 at 11:21
Michał HałuchaMichał Hałucha
12
add a comment |
0
I found the solution. I just put second argument optional. In this situation I don't have to modify my main function.
def sum (n,m=0):
if m!=0:
return n + m
elif type(n)==list:
return n[0]+n[1]
if __name__=='__main__':
assert sum(16, 15) == 31, "EXAMPLE"
assert sum([16, 16]) == 32, "result - missing 1 required positional"
answered Nov 22 '18 at 11:21
Michał HałuchaMichał Hałucha
12
add a comment |
0
0
0
I found the solution. I just put second argument optional. In this situation I don't have to modify my main function.
def sum (n,m=0):
if m!=0:
return n + m
elif type(n)==list:
return n[0]+n[1]
if __name__=='__main__':
assert sum(16, 15) == 31, "EXAMPLE"
assert sum([16, 16]) == 32, "result - missing 1 required positional"
answered Nov 22 '18 at 11:21
Michał HałuchaMichał Hałucha
12
I found the solution. I just put second argument optional. In this situation I don't have to modify my main function.
def sum (n,m=0):
if m!=0:
return n + m
elif type(n)==list:
return n[0]+n[1]
if __name__=='__main__':
assert sum(16, 15) == 31, "EXAMPLE"
assert sum([16, 16]) == 32, "result - missing 1 required positional"
answered Nov 22 '18 at 11:21
Michał HałuchaMichał Hałucha
12
answered Nov 22 '18 at 11:21
Michał HałuchaMichał Hałucha
12
answered Nov 22 '18 at 11:21
Michał HałuchaMichał Hałucha
12
answered Nov 22 '18 at 11:21
Michał HałuchaMichał Hałucha
12
12
add a comment |
add a comment |
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What's your question?
– user2357112
Nov 21 '18 at 23:54
2
You can catch that with a try-except, just like with any other exception, but it's not the kind of thing you should be catching in most situations. Why do you want to do that? If you're trying to write a function with a flexible signature, you should be looking at optional arguments and
*args/**kwargscatchall arguments.– user2357112
Nov 22 '18 at 0:11
"How to fix it if I can't change assert functions" - the way you're using
assertmakes no sense.– user2357112
Nov 22 '18 at 0:24
The second argument to
assertis an assertion failure message, to be used if the first argument is false. It is not used if evaluating the first argument throws an exception, and it is not compared to the exception message in any way. It doesn't make sense to report an assertion failure with message "result - missing 1 required positional" ifsum([16,16]) == 32is false.– user2357112
Nov 22 '18 at 0:27
Ok, thank You. This is example of my exercise. I think that in this exercise is mistake, because i can't edit assert function. I can only modify my def. If i get list and i have to use function with two arguments... it's no sens. Finally, exercise like this is on the very popular page about python. (This code is short version to simply clarify problem)
– Michał Hałucha
Nov 22 '18 at 1:18