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try/except;
, try/except/finally;
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Exception , ;
AttributeError , ;
IOError , I/O ( , open() -) , I/O : , , .
ImportError , import , , ;
IndexError , ;
KeyError , (dictionary key) ;
KeyboardInterrupt , ( Delete Ctrl+C);
NameError , ;
OSError , ;
SyntaxError — , ;
TypeError , . , ;
ValueError , , , , , IndexError;
ZeroDivisionError , division modulo ;

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1 / 0 Traceback (most recent call last): File "<string>", line 1, in <fragment> ZeroDivisionError: integer division or modulo by zero

1 / 0

Traceback (most recent call last):

File "<string>", line 1, in <fragment>

ZeroDivisionError: integer division or modulo by zero

try: 1 / 0 except ZeroDivisionError: print("You cannot divide by zero!")

try:

1 / 0

except ZeroDivisionError:

print("You cannot divide by zero!")

, , . , . , try/except.

try: 1 / 0 except: print("You cannot divide by zero!")

try:

1 / 0

except:

print("You cannot divide by zero!")

. , , , . , , , , . - ZeroDivisionError, , . , , , . :

my_dict = {"a":1, "b":2, "c":3} try: value = my_dict["d"] except KeyError: print("That key does not exist!")

my_dict = {"a":1, "b":2, "c":3}

try:

value = my_dict["d"]

except KeyError:

print("That key does not exist!")

my_list = [1, 2, 3, 4, 5] try: my_list[6] except IndexError: print("That index is not in the list!")

my_list = [1, 2, 3, 4, 5]

try:

my_list[6]

except IndexError:

print("That index is not in the list!")

, . , , . , KeyError, . , . .

Python?

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, , 6, 7. , , IndexError, . . . :

my_dict = {"a":1, "b":2, "c":3} try: value = my_dict["d"] except IndexError: print("This index does not exist!") except KeyError: print("This key is not in the dictionary!") except: print("Some other error occurred!")

my_dict = {"a":1, "b":2, "c":3}

try:

value = my_dict["d"]

except IndexError:

print("This index does not exist!")

except KeyError:

print("This key is not in the dictionary!")

except:

print("Some other error occurred!")

. , . try/except KeyError, except. , . , , , , , . , , . , . :

try: value = my_dict["d"] except (IndexError, KeyError): print("An IndexError or KeyError occurred!")

try:

value = my_dict["d"]

except (IndexError, KeyError):

print("An IndexError or KeyError occurred!")

, , , . , , , . , , , .

, . , . , , , , . , . . , finally.

finally

finally . :

my_dict = {"a":1, "b":2, "c":3} try: value = my_dict["d"] except KeyError: print("A KeyError occurred!") finally: print("The finally statement has executed!")

my_dict = {"a":1, "b":2, "c":3}

try:

value = my_dict["d"]

except KeyError:

print("A KeyError occurred!")

finally:

print("The finally statement has executed!")

, except finally. , ? finally, . exit finally.

except else

try/except else. , . :

my_dict = {"a":1, "b":2, "c":3} try: value = my_dict["a"] except KeyError: print("A KeyError occurred!") else: print("No error occurred!")

my_dict = {"a":1, "b":2, "c":3}

try:

value = my_dict["a"]

except KeyError:

print("A KeyError occurred!")

else:

print("No error occurred!")

, , try/except . , KeyError . , else , No error occurred! . finally:

my_dict = {"a":1, "b":2, "c":3} try: value = my_dict["a"] except KeyError: print("A KeyError occurred!") else: print("No error occurred!") finally: print("The finally statement ran!")

my_dict = {"a":1, "b":2, "c":3}

try:

value = my_dict["a"]

except KeyError:

print("A KeyError occurred!")

else:

print("No error occurred!")

finally:

print("The finally statement ran!")

else finally. else, , try/except, . else, , , . , else, .

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[]

Vasile Buldumac

Python, Golang Kotlin. , . .

E-mail: vasile.buldumac@ati.utm.md

Universitatea Tehnic a Moldovei (utm.md)

2014 — 2018 , -. « »
2018 — 2020 , , « »