import sys

sys_eps = sys.float_info.epsilon

eps = 1.0
while 1.0 + eps > 1.0:
    eps /= 2.0
eps *= 2.0

print(f"The calculated epsilon: {eps}")
print(f"    The system epsilon: {sys_eps}")

# with assign expression
eps = 1.0
while 1.0 + (eps := eps / 2.0) > 1.0: pass
eps *= 2.0

print(f"The calculated epsilon: {eps}")
print(f"    The system epsilon: {sys_eps}")