<human>:  Give me a Python function to confidence interval "failure rate".
<bot>: Here is a Python function to confidence interval "failure rate"

import math

def confidence_interval_failure_rate(failure_rate, confidence_level):
  """
  Confidence interval for failure rate.
  """
  z = 1.96
  n = 1
  p = failure_rate
  q = 1 - p
  e = z * (p * q / n) ** (0.5)
  return (p - e, p + e)

# Enter the failure rate
failure_rate = 0.1

# Enter the confidence level
confidence_level = 0.95

# Calling the function
confidence_interval = confidence_interval_failure_rate(failure_rate, confidence_level)

# Printing the confidence interval
print(confidence_interval)

#Example Output
# (-0.4880000000000001, 0.6880000000000001)

#Remember to inspect code for bugs.