Home Backend Development Python Tutorial Master Python exception handling to make your code more reliable

Master Python exception handling to make your code more reliable

Feb 25, 2024 pm 04:13 PM
Exception handling Exception catching Exception thrown

掌握 Python 异常处理,让你的代码更加可靠

#python Exception handling is a method of handling errors that occur while a program is running. Exception handling allows you to catch, handle, and throw exceptions so that your program can continue running without crashing.

Exceptions in

Python are thrown using the r<strong class="keylink">ai</strong>se keyword. You can use the try and except statements to catch and handle exceptions.

try:
# code that may raise an exception
except Exception as e:
# code to handle the exception
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The

try statement defines a block of code in which an exception may be thrown. The except statement defines one or more blocks of code for catching and handling exceptions.

except The statement can catch specific types of exceptions or all types of exceptions. For example, the following code catches all types of exceptions:

try:
# code that may raise an exception
except:
# code to handle the exception
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You can also use the else statement to specify code to be executed if no exception is thrown. For example, the following code prints "No exception was raised." when no exception was raised:

try:
# code that may raise an exception
except:
# code to handle the exception
else:
print("No exception was raised.")
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Finally, you can also use the finally statement to specify code that should be executed regardless of whether an exception is thrown. For example, the following code always closes the file before the program exits:

try:
# code that may raise an exception
finally:
file.close()
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Exception handling is an important tool in Python that can be used to make your code more reliable. By using exception handling, you can catch, handle, and throw exceptions so that your program can continue running without crashing.

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