[Python] Catching multiple exception [duplicate]

I am trying to cater for dual exceptions. E.g., in Python I have written:

try:
for loop:
print the total_sum
except:
print("The entered string is not a number!")


How do I include a second except to catch if the string is empty?

I have tried:

except:
if my_substring == "":
pring ("It is an empty string!")


Default except must be last.

It runs with a single exception but modifying or adding second fails with SyntaxError.

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