# modal.Retries

`class Retries(object)`

Adds a retry policy to a Modal function.

**Usage**

```
import modal
stub = modal.Stub()
# Basic configuration.
# This sets a policy of max 4 retries with 1-second delay between failures.
@stub.function(retries=4)
def f():
pass
# Fixed-interval retries with 3-second delay between failures.
@stub.function(
retries=modal.Retries(
max_retries=2,
backoff_coefficient=1.0,
initial_delay=3.0,
)
)
def g():
pass
# Exponential backoff, with retry delay doubling after each failure.
@stub.function(
retries=modal.Retries(
max_retries=4,
backoff_coefficient=2.0,
initial_delay=1.0,
)
)
def h():
pass
```

```
def __init__(
self,
*,
# The maximum number of retries that can be made in the presence of failures.
max_retries: int,
# Coefficent controlling how much the retry delay increases each retry attempt.
# A backoff coefficient of 1.0 creates fixed-delay retries where the delay period will always equal the initial delay.
backoff_coefficient: float = 2.0,
# Number of seconds that must elapse before the first retry occurs.
initial_delay: float = 1.0,
# Maximum length of retry delay in seconds, preventing the delay from growing infinitely.
max_delay: float = 60.0,
):
```

Construct a new retries policy, supporting exponential and fixed-interval delays via a backoff coefficient.