Python: Recursion limit

Last update on December 21 2024 07:22:57 (UTC/GMT +8 hours)

Current Recursion Limit

Write a Python program to get the current value of the recursion limit.

sys.getrecursionlimit(): Return the current value of the recursion limit, the maximum depth of the Python interpreter stack. This limit prevents infinite recursion from causing an overflow of the C stack and crashing Python. It can be set by setrecursionlimit().

Sample Solution:

Python Code:

import sys  # Import the sys module to access system-related information

print()  # Print a blank line for spacing
print("Current value of the recursion limit:")  # Display a message about the recursion limit
print(sys.getrecursionlimit())  # Retrieve and print the current recursion limit
print()  # Print a blank line for spacing

Sample Output:

Current value of the recursion limit:                                                                         
1000

How to change the maximum recursion depth in Python?

sys.setrecursionlimit(limit): Set the maximum depth of the Python interpreter stack to limit. This limit prevents infinite recursion from causing an overflow of the C stack and crashing Python.

The highest possible limit is platform-dependent. A user may need to set the limit higher when they have a program that requires deep recursion and a platform that supports a higher limit. This should be done with care, because a too-high limit can lead to a crash.

Python Code:

import sys  # Import the sys module to access system-related information

print("Call sys.getrecursionlimit() to get the current recursion limit:")  # Display a message about getting the current recursion limit
recursion_limit = sys.getrecursionlimit()  # Retrieve and store the current recursion limit
print(recursion_limit)  # Print the current recursion limit

print("\nCall sys.setrecursionlimit(n) to change the recursion limit to n operations:")  # Display a message about changing the recursion limit
sys.setrecursionlimit(1001)  # Set the recursion limit to 1001 operations
new_recursion_limit = sys.getrecursionlimit()  # Retrieve and store the new recursion limit
print(new_recursion_limit)  # Print the new recursion limit

Sample Output:

Call sys.getrecursionlimit() to get the current recursion limit:
1000

Call sys.setrecursionlimit(n) to change the recursion limit to n operations:
1001

Python Code Editor:

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